Regarding the work of carrying out related repairs in lakes in Bopal Ghuma area and other lakes located in the Thaltej ward of the North West Zone.

Name of Work : Regarding the work of carrying out related repairs in lakes in Bopal Ghuma area

and other lakes located in the Thaltej ward of the North West Zone.

Department name Engineering Department

Circle/Division North west Zone

IFB No/Tender Notice No. 01/2026-27

Name of Work Regarding the work of carrying out related repairs in

lakes in Bopal Ghuma area and other lakes located in

the Thaltej ward of the North West Zone.

Estimate contract value(INR) Rs.2,10,00,000.00

Period of Completion 11 Months (Ex.Monsoon)

Bidding Type Open/Limited

Tender Currency Type --------------

Tender Currency Settings --------------

Joint venture Applicable/Not Applicable

Rebate Applicable/Not Applicable

Amount Details:

Bid Document Fee: Rs.3600.00

Bid Document Fee Payable to: Municipal Commissioner, Ahmedabad

Bid Security/ EMD (INR) Rs.2,10,000.00

Bid Security/ EMD In Favor of Municipal Commissioner, Ahmedabad

Bid Document Downloading Start Dates Automatic System Generated

Bid Document Downloading Start Dates Automatic System Generated

Pre Bid Meeting ___/___/____ ;___;____ Hrs

Last Date & Time for Receipt of Bids

Bid Validity Period 180 Days

Remaks Submission of EMD.Tender fee and Other Documents

during office hours : On date 09.06.2026 & 17:00 Hrs. in

the Office of Assistant Manager (North West Zone Office,

Rajmata vijyaraje Sindhiya bhavan,Nr.Atithi dining

hall,Judjes bunglow road, Bodakdev

Bid Opening Date

Officer Inviting Bids: Assistant Manager (North West Zone)

Bid Opening Authority: Assistant Manager (North West Zone)

Address: Rajmata vijyaraje Sindhiya bhavan, Nr. Atithi dining

hall, Judjes bungalow road, Bodakdev

Contact details: 079-32981396

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AMC Finance dept. circular No – 03, Dt.28/04/2023

(A) Guarantees issued by following banks will be accepted as SD/EMD on permanent basis.

(1) All Nationalized Banks

(B) Guarantees issued by following banks will be accepted as SD/EMD for the period up to March –

2024. The validity cut-off date in the GR is with respect to the date of issue of Bank Guarantee

irrespective of the date of termination of Bank Guarantee. Guarantees issued or Authorized by

Ahmedabad Branch Only.

(1) Commercial Banks:

1 A U Small Finance Bank 12 Standard Chartered Bank

2 Axis Bank 13 Tamilnadu Mercantile Bank

3 City Union Bank 14 Bandhan Bank

4 DBS Bank India Limited 15 BNP Paribas

5 DCB Bank 16 CSB Bank

6 Equitas Small Finance Bank 17 HSBC Bank

7 Federal Bank 18 Karnataka Bank

8 HDFC Bank 19 Karur vysya Bank

9 ICICI Bank 20 South Indian Bank

10 IndusInd Bank 21 Utkarsh Small Finance Bank

11 Kotak Mahindra Bank

(2) Co-Operative & Rural Banks of Gujarat

1. The Ahmedabad Mercantile Co-operative Bank Limited

2. Kalupur Commerical Co-operative Bank Limited

3. Nutan nagrik Sahakari Bank Limited

4. Rajkot Nagarik Sahakari Bank Limited

5. Saraswat Co-operative Bank

6. Saurashtra Gramin Bank

7. The Gujarat State Co-Operative Bank

8. The Mehsana Urban Co-operative Bank Limited

9. The Surat District Co-operative Bank

10. The Surat Peoples Co-operative Bank

11. SVC Co-operative Bank LTD.

Seal and Signature of the Bidder Addl City Engineer

(NORTH WEST ZONE)

Special Note: The issuing branch of all bank guarantees shall of Ahmedabad City Only. Joint

venture and subcontracting shall not be allowed under this tender.

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AHMEDABAD MUNICIPAL CORPORATION

"North West Zone, Zonal Office", Nr. Atithi Hotel, Bodakdev Ahmedabad.

Municipal Commissioner invites Percentage Rate sealed tenders from interested contractors .

1 Name of work Regarding the work of carrying out related repairs in lakes in Bopal

Ghuma area and other lakes located in the Thaltej ward of the North

2 Time Limit 11 month (Ex.Monsoon)

3 Eligibility Criteria Register “B” Class in PWD in Govt. R&B/CPWD/AMC or equivalent

registration with any other state Govt. or institutions.

4 Estimated Cost put to tender Rs.2,10,00,000.00

5 Earnest Money Deposit Rs.2,10,000.00 Demand Draft, Pay order, or Cheque ,Bank Guarantee (As

per AMC Finance dept. circular No – 03, Dt.28/04/2023) in favour of

Municipal Commissioner, Ahmedabad) To be submitted as prescribed in

7.0 below. Demand Draft or Bank Guarantee shall be from Nationalized

Bank and valid for 120 days.

6 (A) Security Deposit: 5% of Tender Amount but Depends Upon AMC Circular Only.

(B) Retention 1. @ 2% of the value of work done will be deducted from each RA bill.

It will be released along with release of payment of Final Bill.

7 Tender fees Rs.3600.00 Demand Draft / Pay order in favour of Municipal

(Non refundable) Commissioner, Ahmedabad)

8 Submission of EMD and In separate sealed cover each for EMD and Tender Fees along with

Tender Fees Tender as described in the invitation of tender and submitted to

Assistant Manager (North West zone), Ahmedabad Municipal

Corporation, North West Zone, Zonal Office", Nr.Atithi Hotel, Bodakdev

9 Tenders issue date Tenders from the website http://amc.nprocure.com and

http://nprocure.com. shall be down loaded from

10 Last date of receiving Dt.08/06/2026 up to 18:00 Hrs The tenders received after this date

Tenders. and time will not be entertained under any circumstances.

11 Date of Opening Dt.10/06/2026 at 12:00 Hrs to Assistant Manager "North West Zone

Office", Rajmata vijyaraje sindhya bhavan, Near Atithi hotel, Bodakev,

12 Mode of sending the Tender Document shall be submitted in sealed envelope systems By RPAD/

Documents Speed post/ Hand Delivery/ Courier in sealed covers as described in

submission of the tender.

13 Terms, Condition, & All general condition of contract of Form B1 condition of contract shall

Specification be applicable.

14 liquidated damages- 10% of the Amount For Balance work After Date of Completion or

Compensation For Delay extended time Limit.

15 Goods & Service Tax (GST) Goods & Service Tax (GST) shall be applicable & bidder should submit

all necessary supporting documents as and when asked by AMC.

16 Defect liability period 12 months after completion of the work

Conditional tenders will not be accepted. Municipal Commissioner reserves the rights to reject any or all

the tenders without assigning any reasons thereof.

Conditional tenders will not be accepted. Municipal Commissioner reserves the rights to reject any or all the

tenders without assigning any reasons thereof.

Seal and Signature of the Bidder Addl. City Engineer

(North West Zone)

AHMEDABAD MUNICIPAL CORPORATION

Invitation for Bid (IFB)

1. The AHMEDABAD MUNICIPAL CORPORATION, (Hereinafter called “the Employer”) invites

sealed Tender document from reputed and qualified bidders for the construction of Works

detailed in the Table below:-

Sr. Name of Works Approximate Bid Security Completion

No. value of works (Rs.) Period

1 Regarding the work of carrying out related Rs.2,10,00,000.00 Rs.2,10,000.00 11 months

repairs in lakes in Bopal Ghuma area and other (Ex.Monsoon)

lakes located in the Thaltej ward of the North

2. Tender (a complete set of bidding document) fee shall be Rs.3600/- in the form of Demand

Draft / Pay Order from any Nationalized Bank in favor of MUNICIPAL COMMISSIONER,

Ahmedabad, payable at Ahmedabad, which shall be non refundable. The fees shall be paid

at the time of submitting the tender.

3. Interested bidders shall download the tender documents from website

http://amc.nprocure.com and http://nprocure.com. up to Dt.08/06/2026 at 18:00 hrs tender

fee as mentioned in clause 2 above shall be paid by the bidder at the time of bid submission.

4. All bids must be accompanied by Bid Security of the amount specified for the Works in the

above Table payable at Ahmedabad and drawn in favor of AHMEDABAD MUNICIPAL

CORPORATION, Ahmedabad. Bid Security will have to be in any one of the forms as specified

in Clause of ITB (Instructions to Bidders).

5. All Bids must be delivered to Assistant Manager "North West Zone, Zonal Office", Nr.Atithi

Hotel, Bodakdev Ahmedabad. Not later than 17:00 hrs on Dt.09/06/2026.

Seal and Signature of the Bidder Addl. City Engineer

(North West Zone)

AHMEDABAD MUNICIPAL CORPORATION

ENGINEERING DEPARTMENT

GENERAL CONDITION

1. Contractor shall produce the relevant registration certificate of AMC / State Govt /Central

2. Contractor shall register the work to labour commissioner as per labour act.

3. Contractor shall not sub-let the work without permission of the authority

4. Contractor should have sufficient skilled and unskilled laborers so that he shall start work at

different sites simultaneously. Contractor's having labour force available during festivals shall

only apply. Contractor cannot stop the work due to non availability of labour force.

In case progress is delayed, contractor shall be penalized 0.10% of Tender amount per day for

work done after time limit, maximum up to 10% for remaining value of work.

6. Advance payment / machinery advance will not be paid.

7. Payment of running bill will be made as per recent A.M.C. policy in force.

8. No extra payment will be made due to increase of central / state Govt. Taxes.

9. If the work is not completed within time limit the penalty will be recovered from immediate

bills of Contractors.

10. If the material i.e. MH cover C.C block etc. supplied from Municipal Corporation store then

contractor shall not claim for any extra rate for non execution of such item, partly/fully.

11. In the specifications, "as directed"/"Approved" shall be taken to mean, "as

directed"/approved" by the Engineer-in-charge.

12. Wherever a reference to any Indian Standard appears in the specifications, it shall be taken to

mean as a reference to the latest edition of the same in force on the date of agreement.

13. In "Mode of Measurement" in the specifications wherever a dispute arises in the absence of

specific mention of a particular point or aspect, the provisions on these particular points, or

aspects in the relevant Indian Standards shall be referred to.

14. All measurements and computations, unless otherwise specified, shall be carried out nearest to

the following limits:

(i) Length, width and depth (height)------- 0.01 Meter. (RMT)

(ii) Areas -----0.01 Sq. Mt. (SMT)

(iii) Cubic Contents ------0.01 Cu.Mt. (CMT)

17. The distance, which constitutes lead, shall be determined along the shortest practical route

and not necessarily the route actually taken. The decision of the Engineer-in-charge in this

regard shall be taken as final.

16. Where no lead is specified, it shall mean "all leads"

17. Lift shall be measured from plinth level.

18. Definite particulars covered in the items of work, through not mentioned or elucidated in it,

shall be deemed to be included there in.

19. Reference to specifications of materials as made in the detailed specification of the items of

work is in the form of a designation containing the number of the specification of the material

and prefix 'M' e.g. 'M-5'.

20. Approval to the samples of various materials given by the Engineer-in-charge shall not absolve

the contractor from the responsibility of replacing defective material brought on site or

materials used in the work found defective at a later date.

21. The contract rate of the item of work shall be for the work completed in all respects.

22. No collection of materials shall be made before it is got approved from the Engineer-in-charge.

23. Collection of approved materials shall be done at site of work in a systematic manner.

Materials shall be stone at site of work in a systematic manner. Materials shall be stored in

such a manner as to prevent damage, deterioration or intrusion of foreign matter and to-

ensure the preservation of their quality and fitness for the work.

24. Materials, if and when rejected by the Engineer-in-charge, shall be immediately removed from

the site of work within 24 hours.

25. No materials shall be stored prior to, during and after execution shall be kept in sufficient

numbers and in good working condition on the site of the work.

26. All works shall be carried out in workmanlike manners per the best techniques for the

particular item.

27. All tools, templates, machinery and equipment for correct execution of the work as well as for

checking lines, levels, alignment of the works during execution shall be kept in sufficient

numbers and in good working condition on the site of the work.

28. The mode, procedure and manner of execution shall be such that it does not cause damage or

over loading of the various components of the structure during execution or after completion

of the structure.

29. All necessary safety measures and precaution (including those laid down in the various relevant

Indian Standards) shall be taken to ensure the safety of men, materials and machinery on the

works as also of the work itself.

30. The testing charges of all materials shall be borne by the Contractor unless recovery at one

percent towards testing charges is separately made.

31. The tenderer is required to check the web site for Addendum if any, before 48 hours of tender

submission date and time. The tenderer who quotes the tender without attaching the

addendum will be rejected.

32. As per City Engineer’s circular no.-6/2011-12 Dt.24.6.2011 all terms & conditions will be

33. Contractor has to follow Planning Department Circular No 10 Dt. 07/09/2018 strictly.

34. As per AMC’s Finance department Crcular No.38, Dt.21/11/2022 and approval of competent

authority, rate of all the items are taken without GST and prevailing GST will be payable.

35. All the relevant prevailing AMC circulars/ its time to time revisions are applicable for this work

and all the bidders are bound to follow the same, so the bidder must check before applying for

INSTRUCTION TO TENDERERS

TENDER VALIDITY PERIOD:

The tender shall be kept valid for acceptance for a period of One Hundred Twenty Calendar

days (180) from opening of price bids.

SECURITY DEPOSIT

Within 10 days of receipt of Acceptance from the Corporation, the successful tender shall

furnish to the Corporation Security Deposit of 5% (Five percent) of the contract price Cheque or Bank

Guarantee, pay order, or demand draft of Nationalized Banks and Schedule Banks only.

CONTRACTOR'S SIGNATURE ADDL.CITY ENGINEER

& STAMP (North West Zone)

AHMEDABAD MUNICIPAL CORPORATION

Section I – INSTRUCTIONS TO BIDDERS (ITB)

1. Scope of Bid

1.1 The Ahmedabad Municipal Corporation hereinafter called "the Employer" invites Tender document

for the construction of works (as defined in these documents, hereinafter referred to as "the Works")

Detailed in the table given in the ITB.

1.2 The Works consist of:

a) “TENDER DOCUMENT FOR : Construction/Making of Walk Way and other necessary work in Different

Lake In Thaltej Ward North West Zone..

1.3 The works under this Contract shall be carried out in accordance with the bidding documents

constituting the contract and shall consist of various salient items as generally described below:

1.3.1 Road Works

A) Site clearance, removal of tree stumps and dismantling of obstructions etc.before commencement of

B) True and proper setting out and layout of the Works, setting of bench marks, provisions of all

necessary labor with instruments and appliances;

C) Widening and strengthening/reconstruction of the existing carriageway including raising;

D) Any other item of work as may be required to be carried out for completing the road works in all

respects in accordance with the provisions of the Contract.

2. Eligible Bidders

2.1 This invitation for bids is open to bidders who has necessary bid capacity and who meet the

following requirements:

A bidder shall not be under a declaration of ineligibility for corrupt or fraudulent practice.

The bidders shall have a registration with State PWD, and/or CPWD or AMC or equivalent. If

contractor is not registered with AMC in the relevant class, on award of contract he shall be required to

register himself with AMC within 3 month's time Bidders shall provide such evidence of their continued

eligibility satisfactory to the Employer, as the Employer shall reasonably request.

3. Eligible Material, Equipment and Services

3.1 At the Employer's request, the bidder having offered the lowest evaluated financial bid may be

required to provide evidence of the origin of materials, equipment, and services to the satisfaction of

4. Qualification of the Bidder

Experience of bidder

Experience of having successfully completed similar works during last 7 years ending last day of

month previous to the one inwhich applications are invited should be either of the following..

i. Three similar completed works costing not less than the amount equal to 40% of the

estimate put to tender 40% of the estimate put to tender.

ii. Two similar completed works costing not less than the amount equal to 50% of the estimate

put to tender 50% of the estimate put to tender.

iii. One similar completed works costing not less than the amount equal to 80% of the estimate

put to tender 80% of the estimate put to tender.

(Definition of similar works shall be as mentioned in Appendix-XI)

(Escalation factor as mentioned below shall be used to bring the value of such completed works to

the level of previous financial year)

Year Financial Year Enhancement Factor

Base (year of inviting tender) 2024-2025

Sub contractors experience and resources shall not be taken into account in determining the

bidder’s compliance with the qualifying criteria.

General information

All individual firms must complete the information in this form. Nationality information shall be

provided for all owner(s) or applicant(s) that are partnership or individually owned firms.

1 Name of firm:

2 Head office address:

3 Local office address (if any):

4 Telephone / Mobile no:

5 E-mail addresses:

6 Place of incorporation/registration:

7 Year of incorporation/registration:

additional information regarding litigation, debarment, arbitration, etc.

4.2 Disqualification

Even though the Bidders may meet the above criteria, they are subject to be disqualified for any

of the following reasons:

a) Misleading or false representation in the forms, statements and attachments submitted and

included in document.

b) Record of poor performance such as abandoning the work, rescinding of contract for which

the reasons are attributable to the non-performance of the contractor, consistent history of

litigation awarded against the applicant or financial failure due to bankruptcy.

c) Has been identified by the AMC as poor performer in implementation of ongoing AMC works

e.g. Works completed after notices issued by AMC or poor quality of work or completed after

time limit or not responsive to Engg.incharge instruction.

d) In case of one contractor remains lowest in most of the such North west Zone grouting

work tenders, then in such case, AMC can award such tender to other contractors.

5 Debarment/Black listing

Notwithstanding the above, the Employer may debar or blacklist any of the bidder(s) for their

misleading or false representations in the forms statements etc. for the period to be decided by

6. Cost of Bidding

6.1 The bidder shall bear all costs associated with the preparation and submission of his bid and

he Employer will in no case be responsible or liable for those costs.

7.1 The bidder is advised to visit and examine the Site of Works and its surroundings and obtain

for itself on its own responsibility all information that may be necessary for preparing the bid

and entering into a contract for construction of the Works. The costs of visiting the Site shall be

at the bidder's own expense.

7.2 The bidder and any of its personnel or agents will be granted permission by the Employer to

enter its premises and lands for the purpose of such inspection, but only upon the express

condition that the bidder, its personnel and agents, will release and indemnify the Employer

and its personnel and agents from and against all liability in respect thereof and will be

responsible for death or personal injury, loss of or damage to property and any other loss,

damage, costs and expenses incurred as a result of the inspection.

B. Preparation of Bids

8. Language of Bid

8.1 The bid, and all correspondence and documents related to the bid exchanged between the

bidder and the Employer shall be written in the English language. Supporting documents and

printed literature furnished by the bidder may be in another language provided they are

accompanied by an accurate translation of the relevant passages in the English language, in

which case, for purposes of interpretation of the bid, the English translation shall prevail.

9 Documents comprising the Bid

The bids shall be submitted in hard copy and two copies, one marked as “original” and other

marked as “Duplicate”, both of which comprise the following documents:-

Tender Document:

i) Bid Security for an amount as specified in the Invitation for Bids (IFB).

ii) Power of Attorney

iii) Information as specified.

iv) Any other material / information required to be submitted in accordance with these

Instructions to Bidders (ITB).

The Tender Document shall be hard bound. Bid security shall be furnished in “Original” set of

In case of any ambiguity the “Original” set of document shall prevail.

The bidder shall prepare and submit two copies of the bid in original and duplicate.

10.1 Unless stated otherwise in the bidding documents, the Contract shall be for the whole Works as

described in bidding documents, based on the percentage rate amount in the Bill of Quantities

submitted by the bidder.

10.2 The bidder shall fill in percentage rate above or below and total amount (both in figures and

10.2 The bidder shall fill in percentage rate above or below and total amount (both in figures and

words) for overall items of the Works provided in the Bill of Quantities along with total bid price

derived after application of percentage above or below (both in figures and words). Items (for

which rate has been provided) against which no quantity is entered will be paid for by the

Employer on actual measurement onsite when executed.

Any corrections should be initialed.

All pages of the Bill of Quantities shall be initialed and stamped.

11. Bid Validity

11.1 Bids shall remain valid for a period of 120 days (one hundred twenty days) after the deadline

date for bid submission specified in Clause. The Employer as non-responsive shall reject a bid

valid for a shorter period.

11.2 In exceptional circumstances, prior to expiry of the original bid validity period, the Employer

may request the bidders to extend the period of validity for a specified additional period. The

request and the responses there to shall be made in writing or by fax. A bidder may refuse the

request without forfeiting his bid security. A bidder agreeing to the request will not be required

or permitted to modify his bid but will be required to extend the validity of his Bid Security for

the period of the extension, and in compliance with Clause 14 in all respects.

12. Bid Security

12.1 The bidder shall furnish as part of its Bid, a Bid Security in the amount in the Invitation for Bid

(IFB) for particular work(s). The Bid Security shall be drawn in favor of MUNICIPAL

COMMISSIONER, Ahmedabad, and may be in one of the following forms:

a) Deposit-at-call Receipt from any Nationalized / Scheduled Bank approved by the Reserve

Bank of India (RBI).

b) Bank Guarantee from any Nationalized or RBI approved foreign bank having net worth of

more than Rs.500 crore of Indian operation and acceptable to Employer.

The format of Bank Guarantee shall be in accordance with the AMC requirement.

12.2 The Bid Security of the unsuccessful bidders, except for L1, L2 and L3 bidders will be returned as

promptly as possible.

12.3 The Bid Security of the successful bidder, along with second and third lowest tenders,

will be returned when the bidder has furnished the required performance security and signed

12.4 The Bid Security may be forfeited

a) If the bidder withdraws his bid during the period of bid validity;

b) If the bidder does not accept the correction of his bid price.

c) In the case of a successful bidder, if the bidder fails within the specified time limit to

i) Furnish the required Performance Security ii) sign the Agreement.

13. Format and Signing of Bid

13.1 The bidder shall prepare two copies of the documents comprising the bid as described in

Instructions to Bidders.

13.2 The bid shall be typed or written in indelible ink and shall be signed by a person or

persons duly authorized to sign on behalf of the bidder.

13.3 The bid shall contain no alterations, omissions or additions, except those to comply with

instructions issued by the Employer, or as necessary to correct errors made by the bidder, in

which case the person or persons signing the bid shall initial all such corrections.

C. Submission of Bids

14.1 The inner and outer envelopes shall

a) Be addressed to the Employer at the following address:

Assistant Manager(New West zone) , "New West Zone Office", Old Memnagar Nagar Palika

Building, Near Manav Mandir, Memnagar, Ahmedabad - 380

b) Bear the following identification:

(c) Indicate the name and address of the bidder.

TENDER FOR Construction/Making of Walk Way and other necessary work in Different Lake In Thaltej

Ward North West Zone..

14.2 If the envelope is not sealed and marked as above, the Employer will assume no responsibility

for the misplacement or premature opening of the bid.

15. Deadline for Submission of Bids

15.1 Bids must be received by the Employer at the address specified above not later than the time

and date specified.

15.2 The Employer may, at his discretion, extend the deadline for submission of bids by issuing an

amendment, in which case all rights and obligations of the Employer and the bidders previously

subject to the original deadline will thereafter be subject to the deadline as extended.

Any bid received by the Employer after the deadline for submission of bids shall not be opened.

17. Modification and Withdrawal of Bids

17.1 The bidder may modify or withdraw his bid after bid submission, provided that written notice of

the modification to the Employer prior to the deadline for submission of bids receives

withdrawal. Any MODIFICATIONS in respect of tender document shall be submitted in separate

sealed envelope duly marked so.

17.2 The bidder's modification or withdrawal notice shall be prepared, sealed, marked and delivered

with the outer and inner envelopes additionally marked "MODIFICATIONS" or "WITHDRAWAL"

as appropriate.

17.3 No bid shall be allowed to modify by the bidder after the deadline for submission of bids.

17.4 Withdrawal of a bid during the interval between the deadline for submission of bids and the

expiration of the period of bid validity may result in the forfeiture of the Bid deposit.

D. Bid Opening and Evaluation

18 Opening of Tender (Bid)

18.1 The Employer will open the outer envelope of all the bids received for the package (except those

received late) containing the sealed Tender volume and announce the names of (i) bidders, (ii)

bidders who have submitted modification of Tender bids, and (iii) bidders who have given notice

for withdrawal of their bids in the presence of bidders or their representatives who choose to

attend on the date and time mentioned in the ITB. In the event of specified date of bid opening

being declared as a holiday for the Employer, the Tender will be opened at the appointed time

and location on the next working day.

18.2 Bids for which acceptable notice of withdrawal has been submitted pursuant to Clause

mentioned previously shall not be opened.

18.3 Bidders detail and Tender fee, E.M.D. shall be opened first. The Employer at the opening will

announce bidder’s names, ‘Modification of Tender’, the presence/or absence of Bid Security,

the amount and validity of Bid Security furnished with each bid, is valid registration and such

other details, as the Employer may consider appropriate.

18.4 The bidders or their representatives who are present shall sign attendance sheet evidencing

their attendance.

18.5 The Employer shall prepare besides the record of bid opening, minutes of the Bid opening,

including the information disclosed to those present in accordance with Clause mentioned

19. Examination of Tender and Determination of Responsiveness of Tender

19.1 If the Bid Security furnished does not conform to the amount and validity period as specified in

the Invitation for Bid and has not been furnished in the form, the bid shall be rejected by the

Employer as non-responsive.

19.2 Subject to confirmation of the Bid Security by the issuing bank, the Tender volume

accompanied with valid Bid Security will be taken up for further evaluation. In case, the Bank

does not confirm the Bid Security, the bid shall be rejected as non-responsive and no further

evaluation carried out.

19.3 The tender volume will further be examined to determine whether the bid has been properly

signed, meets the eligibility and qualification criteria, has the required available bid capacity, is

accompanied by the requisite certificates, undertaking and other relevant information specified

in the bid documents and is substantially responsive to the requirement of the bidding

documents and provides any clarification for ascertaining the correctness of the

information/details that the Employer may require.

19.4 If the Tender volume is not substantially responsive, it will be rejected by the Employer and will

not subsequently be made responsive by correction or modification or withdrawal of the non-

conforming deviation or reservation.

20. Opening of Tender

20.1 The Employer will open the Tender volume of those bidders whose document has been

determined to be substantially responsive in accordance and who have the required available

bid capacity, in presence of the bidders or their representatives who choose to attend on the

date intimated to such bidders. In the event of specified date of Tender volume opening being

declared a holiday for Employer, the ‘Tender volume’ shall be opened at the appointed time

and location on the next working day.

20.2 The names of the bidders whose Tender volume is found to be substantially responsive, the bid

prices, the total amount of each bid, any discount, ‘modifications of B.O.Q and such other

prices, the total amount of each bid, any discount, ‘modifications of B.O.Q and such other

details, as the Employer may consider appropriate will be announced by the Employer at the

opening of the Tender volume. Any bid price, which is not read out and recorded at the bid

opening, will not be taken into account in Bid Evaluation.

20.3 The bidders or their representatives who are present shall sign attendance sheet evidencing

their attendance.

20.4 The Employer shall prepare besides the record of bid opening, minutes of the Tender volume

opening including the information disclosed.

21. Examination of Bids and Determination of Responsiveness of Bid

21.1 The Employer will determine responsiveness of each Tender volume with respect to filled

percentage above or below of total amount of Priced Bill of Quantities, Technical Specifications,

percentage above or below of total amount of Priced Bill of Quantities, Technical Specifications,

Drawings and other relevant requirement of bidding documents.

21.2 A substantially responsive Tender volume is one which conforms to all the terms, conditions and

specifications of the bidding documents, without material deviation or reservation. A material

deviation or reservation is one (i) which affects in any substantial way the scope, quality or

performance of the Works; (ii) which limits in any substantial way, inconsistent with the bidding

documents, the Employer's rights or the bidder's obligations under the Contract; or (iii) whose

rectification would affect unfairly the competitive position of other bidders presenting

substantially responsive Tender volume.

21.3 If the Tender volume is not substantially responsive, it will be rejected by the Employer and may

not subsequently be made responsive by correction or withdrawal of the non-conforming

deviation or reservation.

22. Correction of Errors

22.1 Tender volume determined to be substantially responsive will be checked by the Employer for

any arithmetic errors. Arithmetic errors will be rectified on the following basis:-

i) Where there is a discrepancy between the figures and words, for % and amount, the figure in

words will govern and

ii) Where there is discrepancy in total amount arrived by addition of percentage (above or

ii) Where there is discrepancy in total amount arrived by addition of percentage (above or

below), the amount arrived by addition percentage (above or below) as written in word shall

22.2 The amount stated in the Form of Bid will be adjusted by the Employer in accordance with the

above procedure for the correction of errors and shall be considered as binding upon the

bidder. If the bidder does not accept the corrected amount of bid, his bid will be rejected, and

his Bid Security may be forfeited.

23. Evaluation and Comparison of Tender volume

23.1 The Employer will evaluate and compare only those Tender volumes which are determined to

be substantially responsive in accordance with Clause 23 and qualified for award of Contract.

23.2 In evaluating the Tender volume, the Employer will determine for each Tender volume the

valuated Bid Price by adjusting the Bid Price as follows:-

a) Making any correction for errors;

b) Making appropriate adjustments to reflect any price modifications offered.

23.3 If the Bid of the successful Bidder is seriously unbalanced or extremely higher / lower in relation

to the Employer’s estimate of the cost of the items of the Works to be performed under the

Contract, the Employer may require the bidder to produce detailed price rate analysis for any or

all items of the Bill of Quantities, to demonstrate the internal consistency of those prices with

the construction methods and schedule proposed. In case, AMC finds rates extremely below

estimated SOR rate or Market Rate than Tender shall be rejected and second lowest tenderer

may be awarded the work.

23.4 A bid, which is unrealistically lower then estimate and which the bidder, could not substantiate

satisfactorily, may be rejected as non-responsive.

24 Clarification of Bids

24.1 To assist in the examination, evaluation and comparison of bids, the Employer may, at his

discretion, ask any bidder for authentication the correctness of the information/details

furnished by him in his bid. Such request by the AMC and the response by bidder shall be in

writing or by cable/fax, but no change in the price or substance of the bid shall be sought,

offered or permitted except as required to confirm the correction of arithmetical errors

discovered by the Employer in the evaluation of the bids.

24.2 No bidders shall contact the AMC staff on any matter relating to his bid from the time of bid

opening to the time contract is awarded.

24.3 Any effort by the bidder to influence the the AMC staff in the bid evaluation, bid comparison or

contract award decisions may result in the rejection of his bid.

25.1 Information relating to the examination, clarification, evaluation and comparison of bids and

recommendations for the award of a contract shall not be disclosed to bidders or any other

persons not officially concerned with such process until the award to the successful bidder has

been announced. Any effort by a bidder to influence the Employer's processing of bids or award

decisions may result in the rejection of his bid.

F. Award of Contract

26.1 The Employer will award the Contract to the bidder whose bid has been determined to be

substantially responsive to the bidding documents and who has offered the lowest Evaluated

Bid Price provided that such bidder has been determined to be (i) eligible in accordance with

the provisions of previous Clauses and (ii) qualified in accordance with the provisions of

previous Clauses.

27. Employer's Right to accept any Bid and Reject any or all Bids

27.1 The Employer reserves the right to accept or reject any bid and to annul the bidding process

and reject all bids, at any time prior to award of Contract, without thereby incurring any liability

to the affected bidder or bidders or any obligation to inform the affected bidder or bidders of

the grounds for the Employer's action.

28. Notification of Award

28.1 Prior to expiration of the period of bid validity prescribed by the Employer, the Employer will

notify the successful bidder by cable/fax and confirmed by registered letter that his bid has

been accepted. This letter (hereinafter and in the Conditions of Contract called "the Letter of

Acceptance") shall name the sum which the AMC will pay the Contractor in consideration of the

execution, completion and maintenance of the Works by the Contractor as prescribed by the

Contract (hereinafter and in the Conditions of Contract termed "the Contract Price").

28.2 The notification of award will constitute the formation of the Contract.

29. Signing of Agreement

29.1 At the same time that the Employer notifies the successful bidder that his bid has been

accepted, the Employer will direct him to submit the Performance Security and attend the

Employer's office on a date determined by the Employer for signing the Form of Agreement.

30. Performance Security

30.1 Within 10 (Ten) days of the date of receipt of the Letter of Acceptance, the successful bidder

shall deliver to the Employer, a Initial Performance Security in the form of a Bank Guarantee for

an amount equivalent to 5% (five percent) of the Contract Price plus additional security for

unbalanced bids in accordance with relevant Conditions of Contract.

30.2 The Performance Security to be provided by the successful bidder in the form of a bank

guarantee as per format shall be issued from any Nationalized / Scheduled bank.

31. Corrupt or Fraudulent Practices

31.1 The Employer will reject a proposal for award if he determines that the Bidder recommended

for award has engaged in corrupt or fraudulent practices in competing for the contract in

question. The Employer will declare the firm ineligible, either indefinitely or for a stated period

of time, to be awarded a contract by AHMEDABAD MUNICIPAL CORPORATION if it at any time

determines that the firm has engaged in corrupt or fraudulent practices in competing for the

contract, or during execution.

i) “corrupt practice” means behavior on the part of officials in the public or private sectors by

which they improperly and unlawfully enrich themselves and/or those close to them, or induce

others to do so, by misusing the position in which they are placed, and it includes the offering,

giving, receiving, or soliciting of anything of value to influence the action of any such official in

the procurement process or in contract execution; and

ii) “fraudulent practice” means a misrepresentation of facts in order to influence a procurement

process or the execution of a contract to the detriment of the Borrower, and includes collusive

practice among bidders (prior to or after bid submission) designed to establish bid prices at

artificial non-competitive levels and to deprive the Borrower of the benefits of free and open

Seal and Signature of the Bidder Addl. City Engineer

(North West Zone)

AHMEDABAD MUNICIPAL CORPORATION

Section II - CONDITIONS OF PARTICULAR APPLICATION

1. The selection process will lay high emphasis on the ability and competency of contractors to do

high quality work within the given time schedule.

2. The onus of providing, all necessary company / project related information, in appropriate

manner and medium, so as to demonstrate the competency of the bidder and to allow proper

evaluation, will rest entirely on the Bidder.

3. All information has to be typed or hand written legibly. All pages of the Bid have to be Initialed

4. ALL INFORMATION HAS TO BE SUBMITTED IN THE PRESCRIBED FORMAT ONLY.

Projects for which incomplete information has been provided will not be considered for

evaluation. The Bidder may attach separate sheets if so required. However, the final bound

document submitted, has to be submitted in vertical A4 size (210 mm X 297 mm) except Vol. V.

5. The scope of work, project description mentioned in the document is indicative and is likely to

change during detail design. Project brief, along-with the schematic drawings and colored

photographs, is provided to assist the bidder in understanding the fundamental and specific

requirements of the project.

6. Conditional tenders will not be accepted.

7. AMC’s decision for selection or rejection of the offers shall be final and binding to all.

8. Bidder should provide information as mentioned in the prescribed forms.

Information other than that related to this work shall not be considered for evaluation.

9. If Ahmedabad Municipal Corporation is convinced that the Bidder has resorted to material

misrepresentation or provided fraudulent information / statement, the said Bidder will be liable

for disqualification / rejection at any stage.

10. Proof for fulfillment of eligibility criteria should be submitted along with Tender volume. If the

Tender volume is submitted without valid documents and without proof of eligibility criteria

will be rejected.

11. Those who do not meet with the eligibility criteria need not submit the Tender document.

12. Tenders, which do not fulfill all or any of condition or are submitted incomplete in any respect

or are conditional tenders, will be rejected.

13. Municipal Commissioner reserves the rights to reduce/ increase the scope of work and contract

without assigning any reason thereof.

14. DEFECTS: For completion of any work/ part thereof, contractor will be required to request in

writing, to get completion certificate from Additional City Engineer . Date of completion for

start of defect liability period will be considered as the date mentioned in the completion

The contractor shall be required to make good all the damages / defects identified and

conveyed to him, during the entire defect liability period. The method and time limit of

rectification will be decided by the Engineer in charge. If he fails to carry out rectification as

per the instructions, the same will be carried out at his cost and it shall be recovered from the

amount retained.

16. All the material and other test expenses shall be borne by the contractor. Contractor shall have

to provide vehicle and other communication facilities to visit plant and testing laboratory.

17. Contractor shall have to make his own arrangements for water and electricity for the purpose

of construction work at site at his own expense.

18. If the contractor fails to execute the said works within prescribed time limit, the said work will

be carried out at the risk and cost by other contractors with 20 % supervision charges as may be

decided by the Additional City Engineer.

19. Safety and Signage

Contactor has to arrange for the complete safety of the persons working for project, users of

the road i.e. public and vehicles also. All the arrangements of traffic drums, metal / fiber cones,

traffic blinkers, traffic signs as per design, safety tapes etc. to be arranged at site. Necessary

florescent marking on traffic signs to be provided so that it should be visible at night. During

night working hours safety in charge personnel shall be provided with florescent jackets.

The Contractor has to make all the necessary arrangements for making all the temporary

diversions for proper working at site including traffic signage, safety cones, traffic blinkers,

barricading tapes, red and green flags/lights etc for making easy smooth and safe conditions

for the traffic. The Contractor shall and must provide above at his own cost. If the Contractor

fails to comply this clause, Rs. 500/- per day shall be recovered from his bill.

20. Tax, Duties on Materials

All charge on account of Octroi, excise duties, terminal tax, sales tax. Service tax, VAT,

govt.duties etc. on material procurement or any other component for the works from any

source shall be borne by the contractors.

21. Submission of project schedule:

Contractor has to submit the following documents along with the qualification data of the

tender failing in which shall lead to rejection of the tender.

Contractor shall submit the detailed Project schedule showing break up for the various tasks to be

performed in order of their occurrence during the project in Microsoft Project/Prima Vera format.

22 For Flakiness and Elongation Index norms adopted by AMC shall be made applicable.

23. For non-bituminous, bituminous and concrete works, the black trap aggregates of required size shall

be procured from quarry situated in Sevaliya / Timba region or equivalent. Prior approval of source/

material by Additional City Engineer shall be required.

24. Contractor shall be responsible to obey all Labour Laws, Environmental and Safety Laws.(the existing laws

as well as framed from time to time). Any penalties laid due to violation of such laws shall be directly

deducted from the contractor's outstanding.

25. As per St. Committee's resolution 0.5% testing charges shall be deducted from each R.A.Bill

and the amount of actual Testing charges shall be adjusted in the final bill.

26. Special Clause: As per construction works welfare cess Act – 1996 non-refundable one

percent of tender amount shall be deducted against works welfare cess.

Seal and Signature of the Bidder Addl. City Engineer

(North West Zone)

AHMEDABAD MUNICIPAL CORPORATION

FORM OF BID AND APPENDIX TO BID

(The Appendix forms part of the Bid. Bidders are required to fill up all the blanks in the form of Bid)

NAME OF THE CONTRACT : Regarding the work of carrying out related repairs in lakes in

Bopal Ghuma area and other lakes located in the Thaltej ward of the North West Zone.

Addl.City Engineer (North West Zone)

"North West Zone, Zonal Office",

Nr. Atithi Hotel,

Ahmedabad. Gujarat

1. Having examined the Conditions of Contract, Specifications, Bill of Quantities, Drawings

and Addenda No._______ for the execution of the above named works, we, the

undersigned, offer to execute and complete such works and remedy any defects therein in

conformity with the Conditions of Contract, Specifications, Bill of Quantities, Drawings and

Addenda for the sum of Rs_______________ (Rupees______________________

My/our offer works out as under:

Amount put to tender _________ Amount put to tender Rs. _______________

Net Amount Net Amount

2. We acknowledge that the Appendix to Bid forms part of our Bid.

3. We undertake, if our Bid is accepted, to commence the Works on Site within the period

stated in the Appendix to Bid hereto after receipt of an order of the Engineer’s notice to

commence, and to complete and deliver the sections and the whole of the Works

comprised in the Contract within the period stated in the Appendix to Bid hereto.

4. If our Bid is accepted, we will furnish Performance Security (ies) in the form of Bank

Guarantee(s) to be jointly and severally bound on us in accordance with the Conditions of

5. We agree to abide by this Bid for the period of one hundred and twenty (120) days after

the date of bid opening, and it shall remain binding upon us and may be accepted at any

time before the expiry of that period.

6. Unless and until a formal Agreement is prepared and executed, this Bid, together with your

written acceptance thereof, shall constitute a binding contract between us.

7. We understand that you are not bound to accept the lowest or any Bid you may receive.

8. All the partners of our Joint Venture are legally and severally bound by this Bid1.

9. Municipal Commissioner, Ahmedabad has right to reject any or all bids without giving any

Dated this ____________ day of _______________

in the capacity of __________________ duly authorised2 to sign Bid for and on behalf

Address (in block capitals)

1. To be deleted if the bidder is not a Joint Venture.

Certified copy of Power of Attorney/Authorization for signature shall be furnished by the Bidder in

accordance with Clause 20 of Instruction to Bidders (Section I).

Seal and Signature of the Bidder Addl.City Engineer

(North West Zone)

AHMEDABAD MUNICIPAL CORPORATION

ENGINEERING DEPARTMENT

GENERAL SPECIFICATION

Time limit for the work shall be 11 month ( Ex.Monsoon) period after the order to start the works. Progress of work should

be in proportion to time limit.

The contractor shall be remain responsible for Workmen’s compensation if any accident. The contractor shall arrange for

barricading at night and arrangement of Pagi at night to direct the traffic. He shall be responsible for any damage to public.

If any incident happen, during the execution of work. In case of dispute for unseen or overlooked items the decision of the

Dy. City Engineer shall be final. The contractor shall have to give site clean of all rubbish during the work and at the time of

completion of work and hand over the site with final finishing of the work as directed. All the rejected materials shall be

removed from site within 24 hours by contractor at this risk and cost. Debris shall have to cart daily from site.

For mixing mortar either for masonry or for plaster or for any other purpose contractor shall have to prepare through of

bigger size and mix the mortar in the required proportion. In on case he shall be allowed to mix the mortar either on floor

or any finished surfaces. The contractor shall have to make his own arrangement for water required for the work.

If any extra item crops up during the progress of work the same shall be carried out by the contractor and he shall be paid

at the rate fixed by Add.C.E. as per the rate analysis based on latest SOR or if item is not available in SOR than based on

current market rates. In case of extra item decision of Add. City Engg. shall remain final regarding rate.

If in the interest of the Corporation it is necessary to change either any site or the design of the propose work the

contractor shall carry out the same at his quoted rates without charges any extra and the contractor will have to carry out

the works and he will be paid at the rate quoted by him. No claim for extra rate for subsequent changes in site and design is

The cubical contents of the cement bag shall be taken as 1-20 cft. Per bag and the contractors shall have to prepare the

measures boxes according to this measure.

Octroi exemption passes shall not be given for any materials required for the work. Contractor will be fully responsible for

compliance of the various provisions under contract Act. 1970 and the Rules framed the to under.

The tender for the work shall remain open for a period (120) days from the date of opening of the tenders for this work and

that the tenderer shall not be allowed to withdraw on modify the offer on his own during the period. If any tenderer

withdraw or makes any modifications or addition in the terms and conditions of his tender not acceptable to the Municipal

Corporation the Municipal Corporation shall without prejudice to any right or remedy be at liberty to forfeit in full the said

earnest money and black list the contractor.

If the work is not carried out within the specified time limit. from the date of order to start the work the penalty of Rs.- (As

per Form - B1) per day of delay shall be recovered from the immediate bills payable to the contractor. Contractor has to

make his own arrangement for procurement of steel and cement.

Contractors should note the following conditions carefully:-

1. Conditional tender shall not be accepted.

2. All tenders are to be submitted in duplicate without which the tenders are liable to be rejected.

3. In case of tender downloaded from website, tender fee & EMD should be submitted in form of demand draft or in cash.

4. Condition of Form - B1 Standard Specification of material & code of practice will be applicable. Form B1 can be is

available in website. Specification shall be as per ' R& B Dept. - Govt. of Gujarat booklets of Building Works & and Road

Works Specifications published by Gujarat Book Depot, Sector-21. Gandhinagar.

CONTRACTOR'S SIGNATURE ADDL.CITY ENGINEER

& STAMP (North West Zone)

AHMEDABAD MUNICLPAL CORPORATION

MAHANAGAR SEVA SADAN

NORTH WEST ZONE

Clause : 1 Contractor shall not employ any child having age 5 to 15 years as it is prohibited by Child Labour

Prohibition and Regulation Act 1986. Hon'ble Supreme Court has given certain guide lines and as per the

guide lines. If child labour is employed on the site work, the contractor shall have to deposit Rs.

(Rupees Tw enty thousand only) in the child labour welfare fund. If the employer refuses to deposit then

action will be taken for contempt of Supreme Court Judgement and also will be prosecuted by concerned

authority. Because of the breach of any provision of child labour prohibition and regulation Act 1986 by the

Contractor & Municipal Corporation becomes liable to pay any amount then the Municipal Corporation shall

recover the said amount from the contractor.

Clause : 2 The Standing Committee has decided to deduct 1/2% amount from each running bill as per its

Reso. No. 1783 Date 06--02-97, but the Municipal Corporation Board has recently decided that the actual

testing charge is taken and the remaining amount is refundable at the time of final bill (As per Muni. Board

Reso. No. 123 dated 25-02-97)

Clause : 3 Contractor has to follow prevailing Labour act and has to maintain labour register acordingly,and

has to follow other govt.rules.

Clause : 4 Quantity taken in tender are tentative and may differ as per execution of work. No claim shall be

entertain regarding QUANTITIES.

* MODIFICATION OF DOCUMENTS

Modification of specifications and correction/corrigendum in respect of the work if required will be made by

A.M.C. The same shall be placed on A.M.C website which may be downloaded by the tendrers enclosed

along with the tender duly signed. These shall form a part of tender. The tenderer shall not add or amend

the text of any of the documents except in so far as may be necessary to comply with any addendum.

* ADDENDAUM/CORRIGENDUM .

Addendum or corrigendum conveying any change or correction in respect of the work shall form the part of

the contract documents. The full consideration shall be given to such addendum or corrigendum or

correction before submission tender duly filled in by the contractor. Therefore, the contractor shall have to

watch such addendum or corrigendum or correction published by A.M.C through its website

www.egovamc.com. Tenderes shall verify the number of addendum issued and enclose the same with the

tender documents,failing which the tender shall be liable for rejection and no any complaint in respect to

this shall be entertained under any circumstances.

CONTRACTOR'S SIGNATURE ADDL.CITY ENGINEER

& STAMP (North West Zone)

VOLUME – I : TECHNICAL BID

PART - II : TECHNICAL SPECIFICATIONS

SECTION – ‘D’ : CIVIL WORKS

SR. SUB- ITEMS PAGE NO.

(a) DETAILS SPECIFICATIONS OF MATERIAL

(b) D–1 EXCAVATION FOR PIPELINE TRENCHES

(c) D–2 BACK FILLING

(d) D–3 SHORING AND STRUTTING

(e) D–4 GRANULAR/CEMENT CONCRETE BEDDING

(f) D–5 EXCAVATION OF ASPHALT PAVEMENT AND

REINSTATEMENT OF PAVEMENT

(g) D–6 LAYING OF PIPES AND FITTINGS/SPECIALS

(h) D–7 REINFORCED CEMENT CONCRETE PIPES (SOCKET &

(i) D–8 JUNCTION MANHOLE, SCRAPER MANHOLE, FRC

MANHOLE SEAT AND COVER & VENTILATING

(j) D–9 CONCRETE WORK

(k) D-10 DEWATERING

(l) D-11 TECHNICAL SPECIFICATIONS FOR LAKE WORKS

DETAILED SPECIFICATIONS OF MATERIALS

1.1 Water shall not be salty or brackish and shall be clean reasonably clear and free from

objectionable quantities of silt and tract of oil and injurious alkalis, salts, organic mater and

other deleterious materials which will either weaken the mortar or concrete or cause

efflorescence in R.C.C.. The container for transport, storage and handling of water shall be

clean. Water shall conform to the standards specified in I.S. 456-2000 (latest revision).

1.2 If required by the Engineer-in-charge it shall be tested by comparison with distilled water.

Comparison shall be made by means of standard cement tests for soundness, time of setting

and mortar strength as specified in I.S. 269-1976. Any indication of unsoundness, change in

time of setting of 30 minutes either more or decrease of more than 10 percent in strength of

mortar prepared with water sample when compared with the results obtained with mortar

prepared with distilled water shall be sufficient cause for rejection of water under test.

1.3 Water for curing mortar, concrete or masonry should not be too acidic and also not too

alkaline. It shall be free of elements which significantly affect the hydration reaction or

otherwise interfere with the hardening of mortar or concrete during curing or those which

produce objectionable stains or other unsightly deposits on concrete or mortar surfaces.

1.4 Hard and bitter water shall not be used for curing.

1.5 Potable water will be generally found suitable for curing mortar for preparing or concrete.

2.1 Cement shall be Sulphate Resistant Cement conforming to IS : 12330, Ordinary portland

cement as per I.S. 269-1976 or Portland slag cement as per I.S.455-1976.

2.2 Testing of Cement : It should be specifically noted that the cement brought by the

contractor at site of work shall be used after the same is tested at the approved laboratory

as per the direction of the Engineer-in-charge. Such approved laboratory may be located at

Ahmedabad. All the charges for transport and testing of the samples shall have to be borne

by the contractor. The frequency of testing of such materials shall be in accordance to the

relevant Indian standard as directed by the Engineer-in-charge.

3.1 Sand shall be natural sand, clean, well graded, hard strong, durable and gritty particles free

from injurious of dust, clay, kankar nodules, soft or flaky particles shale, alkali salts, organic

matter, loam, mica or other deleterious substances and shall be got approved from the

Engineer-in-charge. The sand shall not contain more than 8 percent of silt as determined by

field test. If necessary the sand shall be washed to make it clean.

3.2 COARSE SAND :

The fineness modulus of coarse sand shall not be less than 2.5 and shall not exceed 3.0. The

sieve analysis of coarse shall be as under:

I. S. Sieve Percentage by I. S. Sieve Percentage by

Designation weight passing Designation weight passing

sieve through sieve.

3.3 FINE SAND :

The fineness modulus shall not exceed 1.0. The sieve analysis of fine sand shall be as under

I. S. Sieve Percentage by I. S. Sieve Percentage by

Designation weight passing Designation weight passing

through sieve through sieve.

2.36 mm 100 300 Micron 5 -

M-4 STONE GRIT :

4.1 Grit shall consist of crushed or broken stone and be hard, strong dense, durable, clean, of

proper gradation and free from skin or coating likely to prevent proper adhesion of mortar.

Grit shall for as possible flaky elongated pieces shall be avoided.

It shall generally comply with the provisions of I. S. 383-1970. Unless special stone of

particular quarried is mentioned. Grit special stone of particular quarries is mentioned. Grit

shall be obtained from the best black trap or equivalent hard stone as approved by the

Engineer - in - charge. The grit shall have no deleterious reaction with cement.

4.2 The grit shall conform to the following gradation as per sieve analysis:

I. S. Sieve Percentage passing I. S. Sieve Percentage Passing

Designation through sieve Designation through sieve

4.3 The crushing strength of grit will be such as to allow the concrete in which it is used to build

up the specified strength of concrete.

4.4 The necessary tests for grit shall be carried out as per the requirements of I. S. 2386 (Parts I

to VIII) 1963, as per instruction of the Engineer-in-charge. The necessity of test will be

decided by the Engineer-in-charge.

M-5A STONE COARSE AGGREGATE FOR NOMINAL MIX CONCRETE :

5A.1 Coarse aggregate shall be of machine crushed stone of black trap or equivalent and be hard,

strong, dense, durable, clean and free from skin and coating likely to prevent proper adhesion

5A.2 The aggregate shall generally be cubical in shape. Unless special stones of particular quarries

are mentioned, Aggregates shall be machine crushed from the best black trap or equivalent

hard stone as approved. Aggregate shall have no deleterious reaction with cement. The size

of the coarse aggregate for plain cement concrete and ordinary reinforced cement concrete

shall generally be as per the table given below. However in case of reinforced cement

concrete the maximum limit may be restricted to 6 mm less than the minimum lateral

clear distance between bars or 6 mm. less than the cover whichever is smaller.

I.S. Sieve Percentage Passing for I.S. Sieve Percentage Passing for

Designation single sized aggregates Designation single sized aggregates

of nominal size of nominal size

NOTE :- The percentage may be varied by the Engineer-in-charge when considered

necessary for obtaining better density and strength of concrete.

5A.3 The grading test shall be taken in the beginning and at the charge of source of materials. The

necessary tests indicated in I.S. 383-1970 I. S. 456-1978 shall have to be carried out to

ensure the acceptability. The aggregates shall be stored separately and handled in such a

manner as to prevent the inter mixed on different aggregates. If the aggregates are covered

with dust, they shall be washed with water to make them clean.

M-5B BLACK TRAP OR EQUIVALENT HARD STONE COARSE :

5B.1 Aggregate for Design Mix concrete : Coarse aggregate shall be of machine crushed stone of

black trap or equivalent hard stone and be hard, strong, dense, durable clean and free from

skin and coating likely to prevent proper adhesion of mortar.

5B.2 The aggregates shall generally be cubical in shape. Unless special stones of particular

quarries are mentioned, aggregates shall be machine crushed from the best, black trap or

equivalent hard stones as approved. Aggregate shall have no deleterious reaction with

5B.3 The necessary tests indicated in I. S. 383-1970 and I.S.456-1978 shall have to be carried out

to ensure the acceptability of the material.

5B.4 If aggregate is covered with dust it shall be washed with water to make it clean.

M-6 CEMENT MORTAR:

6.1 Water shall conform to specification M-1. Cement shall confirm to specification M-2, sand

shall confirm to M-3.

6.2 Proportion of Mix :

6.2.1 cement and sand shall be mixed to specified proportion, sand being measured by measuring

boxes. The proportion of cement will be by volume on the basis of 50 Kg/bag of cement

being equal to 0.0342 cum. The mortar may be hand mixed or machine mixed as directed.

6.3 Preparation of Mortar:

6.3.1 In hand mixed mortar cement and sand in the specified proportions shall be thoroughly

mixed dry on a clean impervious platform by turning over at least 3 times or more till a

homogenous mixture of uniform colour is obtained. Mixing platform shall be so arranged

that no deleterious extraneous material shall get mixed with mortar or mortar shall flow out.

While mixing, the water shall be gradually added and thoroughly mixed to form a stiff

plastic mass of uniform colour so that each particle of sand shall be completely covered with

a film of wet cement. The water cement ratio shall be adopted as directed.

6.3.2 The mortar so prepared shall be used within 30 minutes of adding water. Only such quantity

of mortar shall be prepared as can be used within 30 minutes.

M-7 BRICK BATS AGGREGATE :

7.1 Brick bat aggregate shall be broken from well burnt or slightly over burnt and dense brick. It

shall be homogeneous in texture roughly cubical in shape, clean and free from dirt of any

other foreign material. The brick bats shall be of 40 mm to 50 mm size unless otherwise

specified in the item. The underburnt of overburnt brick bats shall not be allowed.

7.2 The brick bats shall be measured by volume by suitable boxes or as directed.

8.1 The bricks shall be hard or machine moulded and made from suitable soils and kiln burnt.

They shall be free from cracks and flaws and nodules of free lime. The shall have smooth

rectangular faces with sharp corners and shall be of uniform colour.

The bricks shall be moulded with a frog of 100 mm x 40 mm and 10 mm to 20 mm deep on

one of its flat sides. The bricks shall not break when thrown on the ground from a height of

8.2 The size of modular bricks shall be 190 mm x 90 mm.

8.3 The size of the conventional bricks shall be as under :

8.4 Only bricks of one standard size shall be used on one work. The following tolerance shall

be permitted in the conventional size adopted in a particular work.

Length : = 1/8" (3.0 mm) Width : = 1/16" (1.50 mm)

Height : = 1/16" (1.50 mm)

8.5 The crushing strength of the bricks shall not be less than 35 Kg/Sq.cm. The average water

absorption shall not be more than 20 percent by weight. Necessary tests for crushing strength

and water absorption etc. shall be carried out as per I.S. 3495 (Part-I to IV) -

M-8A FLY-ASH LIME BRICKS :

The fly ash lime bricks shall conform to Grade-1 or Grade-2 of IS-3812-1981. The frog of

the 80 to 100 mm x 40 mm x 10 to 20 mm size.

The size of modular bricks shall be 190 mm x 90 mm x 90 mm.

The size of conventional brick shall be 225 mm x 110 mm x 75 mm.

Only bricks of one standard size shall used on one work. The following tolerances shall

permitted in the conventional size adopted in a particular work:

Length : + 3 mm

Height : + 2 mm

The physical characteristic of bricks shall be as follows.

The minimum compressive strength of fly ash lime bricks shall not be less than

Kg/Sq.Cm. and the test shall be conform to IS-3495 (Part-I):1992.

The average drying shrinkage of the brick when tested by the method described in IS 4139-

1989 being shall not exceed 0.15 percent.

The averages water absorption not more than 20 percentage by mass and the test shall

conform to IS-3495 (Part-3):1992.

M-9 MILD STEEL BARS :

9.1 Mild steel bars reinforcement for R.C.C. work shall conform to I.S. 432 ( Part-II ) 1966 and

shall be tested quality. It shall comply with relevant part of I.S.456-1978.

9.2 All the reinforcement shall be clean and free from dirt, paint, grease, mill scale or loose of

thick rust at the time of placing.

9.3 For the purpose of payment the bar shall be measured correct upto 10 mm length and weight

payable worked out the rate specified below :

1. 6 mm 0.22 Kg./Rmt. 8. 20 mm 2.47 Kg./Rmt.

2. 8 mm 0.39 Kg./Rmt. 9. 22 mm 2.98 Kg./Rmt.

3. 10 mm 0.62 Kg./Rmt. 10. 25 mm 3.35 Kg./Rmt.

4. 12 mm 0.89 Kg./Rmt. 11. 28 mm 4.83 Kg./Rmt.

5. 14 mm 1.21 Kg./Rmt. 12. 32 mm 6.31 Kg./Rmt.

6. 16 mm 1.58 Kg./Rmt. 13. 36 mm 7.31 Kg./Rmt.

7. 18 mm 2.00 Kg./Rmt. 14. 40 mm 9.86 Kg./Rmt.

M-10 TMT FE-500D STEEL BARS FOR REINFORCEMENT :

10.1 Reinforcement bars shall conform to IS-432, IS-226 or IS-1786 and welded wire fabrics to IS

: 1566. Only TMT bars for reinforcement in RCC duct shall be used which shall be clean,

free from pitting, oil, grease, paint, loose mill scale, rust, dirty dust or any other such

substance that will destroy or reduce bond.

It permitted by the Engineer-in-charge reinforcement shall be done in accordance with IS-

2751 or IS-9147 as applicable.

10.2 Other provision and requirements shall conform to specification No. M-7 for mild steel bars.

M-11 MILD STEEL BINDING WIRE :

11.1 The mild steel wire size and quality shall conform to I.S. 280-1972.

11.2 The use of black wire will be permitted for binding reinforcement bars. It shall be free from

rust, oil paint grease, loose mill scale or any other undesirable coating which may prevent

adhesion of cement mortar.

M-12 STRUCTURAL STEEL :

12.1 All structural steel conform to I.S.226 - 1975. The steel shall be free from the defects

mentioned in I.S. 226-1975 and shall have a smooth finish. The material shall be free from

loose mill scale, rust pits or other defects affecting the strength and durability. Rivet bars

shall conform to I.S. 1148-1973.

12.2 When the steel is supplied by the contractor test certificate of the manufacturers shall be

obtained according to I.S. 226-1975 and other relevant Indian Standards.

M-13 SHUTTERING :

13.1 The shuttering shall be either of wooden planking of 30 mm. minimum thickness with or

without steel lining or of steel plates stiffened by steel angles. The shuttering shall be

supported on battens and beams and props of vertical ballies properly cross braced together

so as to make the centering rigid. In places of bullie props, brick pillar of adequate section

built in mud mortar may be used.

13.2 The form work shall be sufficiently strong and shall have camber, so that it assumes correct

shape after deposition of the concrete and shall be able to resist forces caused by vibration of

live load of men working over it and other incidental loads associated with it. The

shuttering shall have smooth and even surface and its joints shall not permit leakage of

13.3 If at any stage of work during or after placing concrete in the structure, the form sags or

bulges out beyond the required shape of the structure, the concrete shall be removed and

work redone with fresh concrete and adequately rigid form work. The complete form work

shall be got inspected by and got approved from the Engineer-in-charge, before the

reinforcement bars are placed in position.

13.4 The props shall consist of bullies having 100 mm minimum diameter measured at mid length

and 80 mm at thin end and shall be placed as per design requirement. These shall rest

squarely on wooden sole plates 40 mm thick and minimum bearing area of 0.10 Sq.m. laid

on sufficiently hard base.

13.5 Double wedges shall further be provided between the sole plate and the wooden props so as

to facilitate tightening and easing of shuttering without jerking the concrete.

13.6 The timber used in shuttering shall not be so dry as to absorb water from concrete and swell

or bulge nor so wet to shrink after erection. The timber shall be properly sawn and planned

on the sides and the surface coming in contract with concrete. Wooden form work with

metal sheet lining or steel plates stiffened by steel angles shall be permitted.

13.7 As far as practicable, clamps shall be used to hold the forms together and use of nails and

spikes avoided.

13.8 The surface of timber shuttering that would come in contact with concrete shall be well

wetted and coated with soap solution before the concreting is done. Alternatively coat of raw

linseed oil or oil of approved manufacture may be applied in place of soap solution. In case

of steel shuttering either soap solution or raw linseed oil shall be applied after thoroughly

cleaning the surface. Under no circumstances black or burnt oil shall be permitted.

13.9 The shuttering for beams and slabs shall have camber of 4 mm per meter (1 in 250) or as

directed by the Engineer-in-charge so as to offset of subsequent deflection for cantilevers the

camber at free end shall be 1/50 of the projected length or as directed by the Engineer-in-

M-14 HARD DRAWN WIRE :

The Hard drawn steel wire should confirming to IS-432 (Part 2), Hard drawn steel wire shall

be manufacture and its chemical composition should be as per para 3.0. The finished wire

should be free from defects and finished in a workman like manner. Nominal sizes,

Tolerances, Physical requirements are as per IS : 432 (Part-II) latest edition. Hard drawn

steel wire should be tested as specified in IS : 432 (Part-II) latest edition.

CONTRACTOR'S SIGNATURE ADDL.CITY ENGINEER

& STAMP (North West Zone)

D-1 : EXCAVATION FOR PIPELINE TRENCHES

D.1.1 GENERAL :

D.1.1.1 Any soil which generally yields to the application of pickaxes and shovels or jumpers

or scarifies phawaraa rakes or any such excavating implement or organic soil, gravel,

silt, sand, tuff loam, clay, peat etc., fall under this category.

D.1.2 CLEARING OF SITES :

D.1.2.1 The site on which the drain is to be laid as shown on plan and the area required for

setting out and other operation shall be cleared and all obstructions, loose stones and

materials, rubbish of all kinds, stumps, brushwood as well as all trees, shall be

removed as directed. The roots shall be entirely grubbed up.

D.1.2.2 The products of the clearing to be stacked in such a place and in such a manner, as

directed by the Engineer-in-charge.

D.1.2.3 In Jungle clearings, all trees not specially marked for preservation, bamboos,

Junglewood and brushwood shall be cut and their roots grubbed-up. All wood and

material from the clearing shall be the property of Corporation and shall be arranged

as directed the Corporation Engineer or his authorised agent. The materials found to

be usefully by the Engineer will be conveyed and properly stacked as directed within

the specified limit. Useless materials will be burnt or otherwise disposed off as

directed, by the Engineer-in-charge.

D.1.2.4 All holes or hollows, whether originally existing or produced by drawing-up roots,

shall be carefully filled up with earth, well rammed and leveled off, as may be

D.1.3 SETTING OUT :

D.1.3.1 All the centre line of drain trenches shall be given by the Engineer-in-charge and it

will be the responsibility of the contractor to install substantial reference marks,

bench marks etc. and maintain them as long as required true to line, level, curve &

slopes. The contractor shall assume full responsibility for alignment, elevation and

dimensions of each and all parts of the work. The labour, materials etc. required for

setting out and establishing bench marks and other reference marks shall be arranged

by the contractor at his own cost.

D.1.4 EXCAVATION :

D.1.4.1 The excavation for the drain trenches shall include removal of all materials of

whatsoever nature and whether wet or dry, necessary for the laying of pipe lines and

sub-structure exactly in accordance with lines, levels, grades and curves shown on the

plans L-sections or as directed by the Engineer-in-charge. Trenches shall be

excavated to the exact width at of lowest portion of the trench and the side slopes as

(1:0.5). The contractor shall notify the Engineer before starting excavation to enable

him to take cross sectional levels for purpose of measurements before the ground is

D.1.4.2 Excavation shall be carried out in stratas specified in item of schedule `B'. The lift

will be also as specified in Schedule `B'. Tunneling in case of laying of deep sewers

in place of open excavation shall be allowed up to 2 metre length with the permission

by the Engineer-in-charge. Contractor shall, as far as possible avoid tunneling at the

joints of pipes. In such case, the levels and gradients of drain to be laid shall be

properly attained and shall be got thoroughly checked by the contractor through the

Engineer-in-charge. Payment of tunneling shall be made as per the rate for open

excavation including dewatering etc. as mentioned in the item specification. No

deduction or extra payment shall be made in case of tunneling. Excavated material

shall be stacked at a minimum distance of 1.5 meters away from the edge of the

trench or as directed. Sight rails and boning rods shall be used for checking the

gradients of bed or trenches. Before the trench excavation is started, sight rails made

of good timber shall fixed truly vertical at a uniform height, above the invert as per

the instruction of the Engineer-in-charge. The centre line shall be clearly marked on

the sight rails. Depth of excavation shall be checked by boning rods of suitable size

and length as per instructions of the Engineer-in-charge. All the sight rails shall be

painted alternatively with two different colours so as to provide better visibility.

D.1.4.3 The bottom of the trenches shall be leveled both longitudinally and transversely or

stepped as directed by the Engineer. The contractor shall, at his own cost, remove

such portion of boulders or rock, as required to make the bottom of the trench level.

No filling shall be allowed to being the bottom of the trench in level. If by

contractor's mistake, Excavation is made deeper that shown on the plan ordered by

the Engineer, the extra depth stuff duly watered and rammed as directed by the

Engineer as at the cost of the contractor. All rock or other hard foundation shall be

cleared off, all soft and loose material cut to a firm surface, either level, stepped as

directed by the Engineer. The Engineer may order such changes in the dimensions

and elevation of bottom of trenches and may be deemed necessary to secure

satisfactory laying of pipe lines. The contractor shall at his own expense, make

provision for all pumping, dredging bailing out of draining water and the trenches

shall be kept free of water, during construction work.

D.1.4.4 After each excavation is completed, the contractor shall notify the Engineer to that

effect and no trench will be allowed to be filled up until the Engineer or his

authorised agent approved the depths and dimensions of excavation and the nature of

the strata met with and the level and/or measurements are recorded.

D.1.4.5 The work measured shall be maintained till completion and in case of collapse of

sides or bottom of trenches due to any reasons, it shall be made good without any

D.1.5 PROTECTION :

D.1.5.1 The drain trenches, shall be strongly fenced and red light signals shall be kept at night

in charge of watchmen to prevent accidents. Sufficient care and protective measure

shall be taken to see that the excavation shall not affect or damage the adjoining

structure. The contractor shall be entirely responsible for any injury to life and

damage to the properties etc. Necessary protection work such as guide ropes, crossing

places, barricades, caution Boards etc. shall be provided by the Contractor. The

wooden planks for crossing trenches by public as per requirement shall be provided

by the contractor without any extra cost.

D.1.6 ADDITIONAL REQUIREMENTS :

D.1.6.1 At the joints the trench shall be excavated to an additional depth of 15 cms. and width

of 30 cms. and length of 15 cms. beyond the edge of collar on both the sides or as

directed by Engineer-in-charge. The rate includes for such extra excavation made at

the joints. The trenches shall be excavated perfectly in straight line. The bottom of

trench shall be kept as per invert level or as directed. In obtaining formation on the

bottom trench, the usual method of sight rails and boning rods shall adopted. The

contractor shall have to provide and fix and maintain sight rails and boning rod

without any extra cost.

D.1.6.2 If contractor fails or makes delay to give the hydraulic test of the pipe line laid line

any of the section, without any genuine reasons, he shall be responsible to get re-

excavate any part of the length of trenches refill in such case (i.e. before testing for

safety of pedestrian and / or vehicular traffic) as found necessary be the Engineer-in-

charge without any extra cost, if found necessary and as directed by the Engineer-in-

charge. The contractor shall have to excavated the refilled trenches, during hydraulic

test without any extra cost.

D.1.6.3 In case of excavation across a road, permission of road authorities shall have to be

obtained. At all road crossings, trenches shall be excavated only for half width of the

road and pipe shall be laid. The other half shall be excavated only after back filling

over the laid pipe line making it suitable for the traffic. The contractor shall provided

diversion when the pipe line is to be laid along the road as required and shall

maintain the diversion or any part of it, of damaged without any extra cost. At all

road crossings, the pipe shall be laid below the crust of the road.

D.1.6.4 The contractor shall break the road surface by Excavation of chiseling to the exact

width and length as shown on the drawing or as directed by the Engineer-in-charge.

Separate provision for additional labour in breaking, removing of pavement is made

and under these item quantities of excavation shall be including depth of such

pavement removed.

D.1.6.5 The excavated stuff shall be deposited in uniform layers to avoid mixing with other

kind of materials at no objectionable place or as directed by the Engineer-in-charge.

D.1.6.6 The contractor shall have to make his own arrangements for taking trial pits etc. at his

own cost, as directed by the Engineer-in-charge.

D.1.6.7 If necessary, temporary arrangements shall have to be made to divert or convey

across all natural water ways or build up drains etc. without any extra cost.

D.1.6.8 All water pipes, cables, any structure shall be protected by the contractor as directed

by the Engineer-in-charge, if met during excavation. Any damage caused shall be

rectified without any extra cost.

D.1.6.9 Breaking of brick structures/R.C.C. works, cement concrete etc. coming in

excavation shall be considered as excavation in strata shown in the item, as above and

will be paid at the same rate.

D.1.6.10 All safety precautions shall have to be made by the Contractor including shoring and

D.1.6.11 The excavation in narrow streets, lanes shall have to be carried out with full

precautions so as that no property may be damaged. Any compensation to be paid to

the other party will be paid by the contractor for which the Ahmedabad Municipal

Corporation will not be responsible.

D.1.6.12 All obstacles, structures etc. shall be removed and made good without further claim

D.1.7 CLASSIFICATION OF STRATA :

D.1.7.1 The decision regarding classification of strata shall rest with the Engineer-in-charge

and his decision shall be final and binding to the contractor.

D.1.7.2 All the materials encountered in the excavation shall be classified as under.

D.1.7.3 All sorts of soil, sand, gravel and other similar soft and loose materials these will

include all materials of an earthy or sandy nature which can be easily ploughed or

small shingle and gravel which can be easily removed of shall boulders not exceeding

0.30 Cu.m. or 30 litres (about one Cft.) occurring in such strata will be included in

the rate for this item.

D.1.7.4 Soft Murrum :

D.1.7.4.1 This shall include materials which can be easily removed with the shovel after

loosening with a pick.

D.1.7.5 Hard Murrum :

D.1.7.5.1 This shall include all kinds of disintegrated rock or shale or inundated clay from

boulders, larger that 0.30 Cu.m. or 30 litres (about one Cft.) and which can be

removed with pick and shovel though not without some difficulty any which do not

require blasting.

D.1.7.6 Hard Murrum and Boulders :

D.1.7.6.1 This shall include all kinds of disintegrated rock or shale or inundated clay

interspersed with boulders less than half (0.5) a cubic meter (about half Ci.cft.) and

large than 0.30 Cu.m. or 30 litres (approx. one Cft.) which do not normally required

blasting and can be removed with pick, bar wedge and hammer.

Boulders bigger than 0.5 Cu.m. will be paid for as soft or hard rock according to as it

is soft or hard-rock.

D.1.7.7 Soft Rock :

D.1.7.7.1 This shall include all materials which is rock or hard conglomerate, all decomposed

and watered rock, highly fissured rock, old masonry and also soft rock boulders

bigger than 0.5 Cubic meter and other verities of rock which do not require blasting

and which can be removed with rock, crow bars, wedges and hammer with some

D.1.7.8 Hard Rock (Blasted)

D.1.7.8.1 This shall include all rocks, occurring in masses which could best be removed

blasting and where in the opinion of the Engineer, blasting is necessary and is

D.1.7.9 Hard Rock (Chiseled, Wedge or Line Drilled)

D.1.7.9.1 This shall include all rock, occurring in masses or boulders bigger than half cubic

meter size each, which can best be removed by blasting but which owning to the

proximity or structures, possibility of shattering the rock below or for any other

reasons should be cut by means of cold chisels of wedges or line drilling.

D.1.7.10 Laterite :

D.1.7.10.1 This shall include laterite rock soft and hard which can be removed with hammer,

chisels, crow or by blasting. Latteritic murrum which has not hardened into stone

shall be classified as hard murrum.

D.1.7.10.2 The classification of various, stratas met with during excavation will be decided by

the Engineer-in-charge and his decision shall be final and binding on the contractor.

D.1.7.10.3 Rock referred to above would include Besalt, Trap, Granite, Quartzite, Gneiss,

laterite and other types.

D.1.7.10.4 The use of explosive in excavation will not be considered as a reason for other

classification then the above unless clearly necessary in the opinion of Engineer-in-

D.1.8 DEWATERING :

D.1.8.1 Unless specially provided for as a separate item in the contract, the rate of excavation

would include bailing or pumping out all water which may accumulate in the

excavation during the progress of the work, either, by percollation, seepage, springs,

rain or any other cause and diverting surface flow if any, by earthen bunds shall be

removed as soon as the work is completed.

D.1.8.2 Unless specially provided as a separate item of contract, pumping of water from

trenches etc. shall be carried out by the Contractor at his cost and he should arrange

for required number of dewatering sets for the above. He should take precaution to

prevent any damage to the foundation, trench, concrete, or masonary or any adjacent

structure. The excavation shall be kept free from water by the contractor (1) during

inspection and measurement (2) when concrete and/or masonary are in progress and

till the construction work reaches above, the natural water level had (3) till the

Engineer considers that the mortar is sufficiently set.

D.1.9 DISPOSAL OF EXCAVATED STUFF :

D.1.9.1 The surplus excavated earth, after backfilling the trenches shall have to be removed

from the site as directed.

D.1.9.2 After compaction and consolidation, if any short fall of earth is found then contractor

has to bring the same to the required quantity in order to meet shortfall at his own

cost. More over, if any settlement of road after reinstatement is observed during the

defect liability period of the work. Contractor shall be fully responsible for the

defective work and patches / depression / settlement shall be repaired with quarry

spoil or metal at contractor's own cost. If contractor fails to repair the patches/

depression / settlement in time, corporation will repair it at all risk and cost of

No bulkage shall be payable for carted material. Contractor should quote the rates

Surplus earth shall not be disposed off in a way that leads to nuisance to the public or

D.1.9.3 The site should be cleared off all debries on completion of work.

D.1.10 MEASUREMENT AND PAYMENT :

D.1.10.1 The payment of a various classes of excavation, depending upon the depth of

excavation, shall be made at the unit rate per cubic meter for the quantity actually

excavated and accepted by the Engineer limited to dimensions shown in the

sanctioned plans L-Section or as directed by the Engineer. Excavation in excess of

the sanctioned dimensions shall not be measured nor paid for and if so ordered by the

Engineer. The contractor shall have to fill up the excess depth with selected

excavated stuff duly watered and rammed as directed by the Engineer-in-charge

without any extra payment to the Contractor.

D.1.10.2 Dimension shall be measured correct to two places of decimals of a meter and

individual quantity shall be calculated to two places of decimals of a cubic meter.

D.1.10.3 The rate for the item of excavation shall include (Unless and otherwise mentioned).

(a) Clearing of site.

(b) Setting out work including all materials and labour.

(c) Dewatering of excavation pit trench during the progress of work.

(d) Light compaction of bottom of the trench if required.

(e) Excavation & removal, sorting and stacking of all excavated stuff as directed.

(f) Necessary protection arrangements including labour, materials equipment etc.

to ensure safety and protection against risk or accident.

(g) Providing facilities for inspection and measurements at any time by the

concerned Corporation Officials.

(h) Compensation for injury to life and damage to property if caused during

progress of work.

D.10.3.1 The measurement of item shall exclude the quantity of excavation carried out for

D.1.10.4 Penalty :

Penalty for no barricading shall be Rs. 200 per Rmt. In case the contractor does not

provided barricading and other safety measures. The same shall be carried out by

AMC at risk and cost of contractor. 1.5 times the actual cost incurred shall be

D-2 : BACKFILLING

D.2.1.1 All fill material will be subject to Engineer’s approval. If any material is rejected by

Engineer, contractor shall remove the same forthwith from the site at no extra cost to

the owner. Surplus fill material shall be deposited / disposed off as directed by

Engineer after the fill work is completed upto a distance of 5 Km for which separate

payment will be paid under the corresponding item.

D.2.1.2 No earth fill shall commence until surface water discharges and streams have been

properly intercepted or otherwise dealt with as directed by Engineer.

D.2.2.1 To the extent available, selected surplus soils from excavated materials shall be used

as backfill. Fill material shall be free from clods, salts, sulphates, organic or other

foreign material. All clods of earth shall be broken or removed. Where excavated

material is mostly rock, the bounders shall be broken into pieces not larger than

mm size, mixed with properly graded fine material consisting of murrum or earth fill

up the voids and the mixture used for filling.

D.2.3 If any selected fill material is required to be borrowed, Contractor shall make

arrangements for bringing such material from outside borrow pits. The material and

source shall be subject to prior approval of Engineer. The approved borrow pit area

shall be cleared of all bushed, roots of trees, plants, rubbish etc, top soil containing

salts / sulphate and other foreign material shall be removed. The materials so

removed shall be burnt or disposed off as directed by Engineer. Contractor shall

make necessary access to borrow areas and maintain the same, if such access road

does not exist, at his cost.

D.2.4 FILLING IN PITS AND TRENCHES AROUND FOUNDATIONS OF

STRUCTURES, WALLS ETC.

D.2.4.1 As soon as the work in foundations has been accepted and measured, the spaces around the

foundations, structures, pits, trenches etc. shall be cleaned of all debris, and filled with earth

in layers not exceeding 20 cm, each layer being watered, rammed and properly

consolidated, before the succeeding one is laid. Each layer shall be consolidated to the

satisfaction of Engineer. Earth shall be rammed with approved mechanical compaction

machines if instructed. Usually no manual compaction shall be allowed unless Engineer is

satisfied that in some cases manual compaction by tampers cannot be avoided. The final

backfill surface shall be trimmed and leveled to proper profile as directed by Engineer or

indicated on the drawing.

D.2.5 FILLING IN TRENCHES

D.2.5.1 Filling in trenches for pipes and drains shall be commenced as soon as the joints of

pipes and drains have been tested and passed. The backfilling material shall be

properly consolidated by watering and ramming, taking due care that no damage is

caused to the pipes.

D.2.5.1.2 Where the trenches are excavated in soil, the filling from the bottom of the trench to

the level of the centreline of the pipe shall be done by hand compaction with selected

approved earth in layers not exceeding 8 cm; backfilling above the level of the

centreline of the pipe shall also be done with selected earth by hand compaction or

other approved means in layers not exceeding 20 cm.

D.2.5.1.3 In case of excavation of trenches in rock, the filling upto a level 30 cm above the top

of the pipe shall be done with fine materials, such as earth, moorum etc. The filling

up of the level of the centreline of the pipe shall be done by hand compaction in

layers not exceeding 20 cm. Also the filling above the centreline of the pipe shall be

done by hand compaction or approved means in layers not exceeding 20 cm. The

filling from a level 30 cm. Above the top of the trench shall be done by hand or other

approved mechanical methods with broken rock filling of size not exceeding 20 cm

mixed with fine material as available to fill up the voids.

D.2.5.1.4 Filling of the trenches shall be carried simultaneously on both sides of the pipe to

avoid unequal pressure on the pipe.

D.2.6 GENERAL SITE GRADING

D.2.6.1 Site grading shall be carried out as indicated in the drawings and as directed by

Engineer. Excavation shall be carried out as specified in the specification. Filling

and compaction shall be carried out as specified elsewhere unless otherwise indicated

D.2.6.2 If no compaction is called for, the fill may be deposited to the full height in one

operation and levelled. If the fill has to be compacted, it shall be placed in layers not

exceeding 200 mm and leveled uniformly and compacted as indicated in before the

next layer is deposited.

D.2.6.3 To ensure that the fill has been compacted as specified, field and laboratory tests shall

be carried out by Contractor at his cost.

D.2.6.4 Field compaction test shall be carried out at different stages of filling and also after

the entire height has been completed. This shall hold good for embankments as well.

D.2.6.5 Contractor shall protect the earth fill from being washed away by rain or damaged in

any other way. Should any slip occur, Contractor shall remove the affected material

and make good the slip at his cost.

D.2.6.6 The fill shall be carried out to such dimensions and levels as indicated on the

drawings after the stipulated compaction. The fill will be considered as incomplete if

the desired compaction has not been obtained.

D.2.6.7 If specifically permitted by Engineer, compaction can be obtained by allowing loaded

trucks conveying fill or other material to ply over the fill area. Even if such a method

is permitted, it will be for contractor of demonstrate that the desired / specified

compaction has been obtained. In order that the fill may be reasonably uniform

throughout, the material should be dumped in place in approximately uniform layers.

Traffic over the fill shall then be so routed to compact the area uniformly throughout.

D.2.6.8 If so specified, the rock as obtained from excavation may be used for filling and

leveling to indicate grades without further breaking. In such an event, filling layers

not exceeding 50 cms approximately. After rock filling the void in the rocks shall be

filled with finer materials such as earth, broken stone etc. and the area flooded so that

the finer materials fill up the voids. Care shall be taken to ensure that the finer fill

material does not get washed out. Over the layer so filled, a 100 mm thick mixed

layer of broken materials and earth shall be laid and consolidation carried out by a

tonne roller. No less than twelve passes of the roller shall be accepted before

subsequent similar operations are taken up.

D.2.6.9 Fill Density

D.2.6.9.1 The compaction, only where so called for, in the schedule of quantities / items shall

comply with the specified (Standard Proctor / modified Proctor) density at moisture

content differing not more than 4 percent from the optimum moisture content.

Contractor shall demonstrate adequately at his cost, by field and laboratory tests that

the specified density has been obtained.

D.2.6.10.1 Lead for deposition / disposal of excavated material, shall be as specified in the

respective item of work. For the purpose of measurement of lead, the area to be

excavated or filled or area on which excavated material is to be deposited / disposed

off shall be divided into suitable blocks and for each of the blocks, the distance

between centerlines shall be taken as the lead which shall be measured by the shortest

straight line route taken by Contractor. No extra compensation is admissible on the

grounds that the lead including that for borrowed material had to be transported over

marshy or ‘katcha’ land / route.

D.2.6.11 Measurement and Payment

D.2.6.11.1 Backfilling as per specifications on the sides of foundations of columns, footings,

structures, walls, tanks, rafts, trenches etc. with excavated material shall be done. As

a rule, material to be backfilled shall stacked temporarily within the basic lead of

meters unless otherwise directed by the Engineer. If Engineer directs / permits a lead

of over 90 meters for such material, the conveyance of the material for the extra

distance over the basic lead of 90 meters for backfilling will be paid for.

D.2.6.11.2 Actual quantities of consolidated back filing shall be measured and paid in cubic

Penalty for improper watering and compaction will be Rs. 350/Tanker required and

rent for roller @ Rs. 20 per sq.m.

In case the watering and compaction of the backfilled material is not as per the

specifications, AMC will carry out the same through own resources. A rate of Rs.

350 per water tanker and Rs. 20 per sq.m. for rolling and compacting will be

recovered from the contractor.

CONTRACTOR'S SIGNATURE ADDL.CITY ENGINEER

& STAMP (North West Zone)

D-3 : SHORING AND STRUTTING

D.3.1 GENERAL :

D.3.1.1 This item is applicable only when the trench having more than 4.0 mt. depth and if

the sides of trenches cannot be sloped or stepped due to any reason and the

Engineer-in-charge feel the necessity for safety of trench and adjacent property and

traffic. The Contractor should have to take previous approval from Engineer-in-

charge before commencing this item.

D.3.2 MATERIALS :

D.3.2.1 Sheathing, planks, wales, struts etc. required for shoring and strutting shall be of

approved quality of wood or structural steel as per requirements of IS-3764-1966.

D.3.3 WORKMANSHIP :

D.3.3.1 The Contractor before execution shall get approval of design of shoring from

Engineer-in-charge. The shoring shall be of sufficient strength to resist side

pressure and ensure safety from slips and below and to prevent damage to work and

to prevent injury to persons. It shall be removed after getting permission of Engineer-

in-charge, after all items for which it is required area completed. Shoring and

strutting shall conform to IS - 3764 - 1966 or its latest version.

D.3.3.2 The sheeting shall be placed against the side of trench so that length of each piece of

sheeting is vertical. The sheeting shall be held securely in place against the Wales

by ensuring that sheeting is kept firmly placed against the wall of the trench.

Where the trench is excavated in loose, sandy or soft soil or soil which has been

previously excavated or soil which is under hydrostatic pressure, each piece of

sheeting shall be driven into the bottom of trench so has to be firmly held in place.

D.3.3.3 Where two or more pieces of sheeting are used one above another, the sheeting

shall be so arranged that the lower piece of sheeting overlap the lowest Wales

supporting the pieces of sheeting next above next above it. These pieces of sheeting

shall be firmly driven in to the soil and securely supported by Wales and struts as the

trench is made deeper.

D.3.3.4 The wales shall be supported parallel to the bottom or the proposed bottom of the

trench. Each wale shall be supported on cleats spliced to the sheathing or by posts set

on the wales next below it and in the case of lowest wale on the bottom of the

trench itself. Where necessary, wedges may be provided between a wale and

sheathing is supports to that roughly uniform support is given to all individual pieces

D.3.3.5 Struts shall be horizontal and at right angles to the wales of sheathing supported

thereby. Struts shall be cut to the proper length required to fit in tightly between

wales, where necessary, the struts shall be held securely in place by wedges,

driven between struts and the wales. Struts shall be placed on cleats spliced or

bolted to posts supporting wales.

D.3.3.6 The sizes and spacing of sheathing, wales struts and wedges used for shoring and

timbering for different depth shall conform the requirement of IS-3764-1966 or its

latest version.

D.3.3.7 The extra width of excavation that may be deemed necessary for the purpose of

shoring and strutting will be under-stood to be covered in the rate for item of

shoring and strutting for drain side.

D.3.3.8 The contractor shall have to make all the necessary arrangements while removing

shoring strutting. However, if contractor fails to remove the shoring strutting safely,

the corporation shall not be responsible for any type of damages and contractor shall

have to bear all the cost for the same and the corporation shall not pay any extra

payment for the same.

D.3.3.9 Shoring and strutting shall be close or open depending on the nature of soil and the

depth of trench. The type of shoring and strutting shall be determined by the

Engineer in charge. It shall be the responsibility of the contractor to take all

necessary steps to prevent the sides of trenches from collapse. Engineer in charge

should take guidance from IS : 3764-1966 for designing the shoring and strutting

arrangements and specifying the profile of excavation.

D.3.4 Measurement :

D.3.4.1 The item includes all labours, materials, equipments, tools etc. complete for whole

the period for satisfactory completion of the item.

D.3.4.2 No extra payment shall be given for extra excavation that required to do shoring or

D.3.4.3 The rate shall be for a unit of one square meter.

D.3.4.4 No payment shall be made to any wood which has been left out by the contractor

while removing the shoring, strutting etc.

CONTRACTOR'S SIGNATURE ADDL.CITY ENGINEER

& STAMP (North West Zone)

D-4 : GRANULAR /CEMENT CONCRETE BEDDING

(A) PROVIDING BEDDING INCL. RAMMING, WATERING, CONSOLIDATING

ETC. FILLING IN TRENCH WITH AVAILABLE SAND WITHIN 2 KM.

D.4.0 WORKMANSHIP

D.4.1 The sand / granular material to be use for bedding shall be free from salts,

organic or other foreign matter. All clods of sand shall be broken.

D.4.2 As soon as the work in trench has been completed and measured the site of

trench shall be cleared of all debris, brick bats, mortar dropping etc. sand filled

with sand in layers not exceeding 20 cms. Each layer shall be adequately

watered, rammed and consolidated before the succeeding layer is laid. The

sand shall be rammed with iron rammers where feasible and with the butt ends of

crowbars, where rammer cannot be used.

D.4.3 The finished level of bedding shall be kept to shape intended to be given to

D.4.4 The consolidation may be done by hand rammers, where so specified. The extent of

consolidation required shall also be as specified.

D.4.5 The sand /granular material shall be allowed to be used in bedding the trenches.

Under no circumstances black cotton soil be used for bedding.

D.4.6 MODE OF MEASUREMENTS & PAYMENT :

The payment shall be made for bedding the granular material as per drawings. No

deduction shall be made for shrinkage or voids, if consolidated as instructed above.

The rate shall be for a unit of one cubic meter.

(b) Providing and casting situ cement concrete (1:4:8) bedding using granite

quartizite trap metal of size 25 mm to 40 mm including consolidation, curing etc.

D.4.7 The concrete bedding of proportion (1:4:8) shall be according to specification of Item

of concrete works.

D.4.8 MODE OF MEASUREMENTS & PAYMENT :

The payment shall be made for concrete bedding as per drawings. No deduction shall

be made for shrinkage or voids, if consolidated as instructed above.

The rate shall be for a unit of one cubic meter.

D-5 : EXCAVATION OF ASPHALT PAVEMENT & REINSTATEMENT

(A) EXCAVATION OF ASPHALT PAVEMENT

D.5.1 Under this item contractor shall demolish existing asphalt or WBM pavement met

with during laying of RCC pipe.

D.5.2 Only area of pavement intercepted in pipe laying shall be demolished. If excess area

is demolished same shall be reinstated by the contractor.

D.5.3 Demolished material like asphalt pavement lump and metal shall be stacked

separately as directed by the Engineer, so that it can be reused in doing the pavement

on completion of laying the pipe.

D.5.4 Work done to the extent of requirement for laying of drain and as per specifications

shall be measured in sq.m. and paid at the tender rate.

(B) REINSTATEMENT OF ASPHALT PAVEMENT :

The scope includes the reinstatement of asphalt / cement concrete / WBM / murrum /

earth surfaces of design thickness crossing the sewerage pipelines.

D.5.7 Reinstatement

After the work of laying and jointing of pipeline is completed, the earthwork, murrum

surface and asphalt surface will be reconstructed as per the designed thickness as

directed and/or using with old soling and metalling material. Any extra spoul or metal

required shall be brought to contractor at own cost. The prepared surface shall be

grouted with asphalt. The surface will be maintained till the work is completed. The

measurement will be paid on square meter basis for all the types of surfaces

constructed including earthwork.

D.5.8 The payment for reinstatement of asphalt road payment will be made on sq.mt. basis of

the work carried out as per the design and direction of engineer –in-charge

D.5.9 Penalty for incomplete reinstatement work shall be recovered @ 1.5 times the actual

expense incurred by AMC.

D-6 : LAYING OF PIPES AND FITTINGS/SPECIALS

The specification covers the requirements for laying of pipes and fittings/specials

below ground. The two parts are complementary and are to be read together for a

correct interpretation of the provisions of this specification.

D.6.1 APPLICABLE CODES

The laying of pipes and fittings/specials shall comply with all currently applicable

statutes, regulations, standards and codes. In particular, the following standards,

unless otherwise specified herein, shall be referred to. In all cases, the latest revision

of the standards/codes shall be referred to. If requirements of this specification

conflict with the requirements of the standards/codes, these specifications shall

D.6.2 CODES OF PRACTICE

a) IS: 783 -Code of practice for laying of concrete pipes

b) IS: 3114-Code of practice for laying of cast iron pipes

c) IS: 3764-Excavation work - Code of Safety

d) IS: 4127-Code of practice for laying of glazed stoneware pipes

e) IS: 5822-Code of practice for laying of electrically welded steel pipes for

f) IS: 6530-Code of practice for laying of asbestos cement pressure pipes

D.6.3 CARTING AND HANDLING

Pipes and fittings/specials shall be transported from the factory to the work sites at

places along the alignment of pipeline as directed by Owner/ Engineer. Contractor

shall be responsible for the safety of pipes and fittings/specials in transit,

loading/unloading. Every care shall be exercised in handling pipes and

fittings/specials to avoid damage. While unloading, the pipes and fittings/specials

shall not be thrown down from the truck on to hard surfaces. They should be

unloaded on timber skids with steadying ropes or by any other approved means.

Padding shall be provided any other approved means. Padding shall be provided

between coated pipes, fittings/ specials and timber skids to avoid damage to the

coating. Suitable gaps between pipes should be left at intervals in order to permit

access from one side to the other. In case of spigot socket pipes, care should be taken

regarding orientation of pipes while unloading. As far as possible pipes shall be

unloaded on one side of the trench only. The pipes shall be checked for any visible

damage (such as broken edges, cracking or spalling of pipe) while unloading and

shall be sorted out for reclamation. Any pipe, which shows sufficient damage to

preclude it from being used, shall be discarded. Dragging of pipes and

fittings/specials along concrete and similar pavement with hard surfaces shall be

prohibited. Pipes can be brought to site only after the mandatory tests i.e. are

completed and pipe lots accepted. i.e. Cube tests, T.E.B., Hydrostatic, water

absorption test.

Each stack of pipes shall contain only pipes of same class and size, with consignment

or batch number marked on it with particulars of suppliers wherever possible.

Storage shall be done on firm level and clean ground and wedges shall be provided at

the bottom layer to keep the stack stable. The stack shall be in pyramid shape or the

pipes laid length-wise and crosswise in alternate layers. The pyramid stack shall be

made for smaller diameter pipes for conserving space in storing them. The height of

the stock shall not exceed 1.5m.

Fittings/specials shall be stacked under cover and separated from pipes.

Rubber rings shall be stored in a clean, cool store away from windows, boiler,

electrical equipment and petrol, oils or other chemicals. Particularly in the field

where the rubber rings are being used it is desirable that they are not left out on the

ground in the sun or overnight under heavy frost or snow conditions.

Before excavating the trench the alignment of pipeline shall be approved by

Owner/Engineer. The excavation of trenches and pits for machineholes/ chambers

shall be carried out in accordance with the Technical Specification: Section-D1 and

shall be done such that it does note get far ahead of the laying operating as approved

by Owner/Engineer.

To protect persons from injury and to avoid damage to property, adequate barricades,

construction signs, red lanterns and guards as required shall be placed and maintained

during the progress of the construction work and until it is safe for the traffic to use

the roadways. The relevant Indian Standards and the rules and regulations of local

authorities in regards to safety provisions shall be observed.

Suitable barricading shall be provided along the sides of trenches and pits. The posts

of fencing shall be of timber securely fixed in the ground not more than 3 m apart and

they shall not be less than 75 mm in diameter or less than 1.2m above surface of the

ground. There shall be two rails, one near the top of the post and the other about

450mm above the ground and each shall be from 50 mm to 70mm in diameter and

sufficiently long to run from post to post to which they shall be bound with strong

rope. The method of projecting rails beyond the post and trying them together where

they meet will not be allowed on any account. All along the edges of the excavation

trenches a bank of earth about 1.2m high shall be formed where required by owner/

engineer for further protection.

The road metal and also the rubble packing shall first be stripped off for the whole

width of the trench/pit and separately deposited in such place or places as may be

determined by Owner/Engineer.

During excavation, large stones and rubble shall be separated and removed from the

excavated soil and stacked separately. The material from excavation shall be

deposited on either side of the trench leaving adequate clear distance from the edges

of the trench and pit, or as may be necessary to prevent the sides of the trench pit to

slip or fall, or at such a distance and in such a manner as to avoid covering fire

hydrants, sluice valves, machineholes covers etc. and so as to avoid abutting the wall

or structure or causing inconvenience to the public and other service organizations or

otherwise as Owner/engineer may direct.

Contractor shall take into account additional excavation if any as Owner/ Engineer

may require in order to locate the position of water pipes, drains, sewers etc. or any

other works which may be met with, in or about the excavation of trenches/pits while

quoting the rates for excavation. Such service lines if met with during excavation

shall be properly maintained by Contractor, by means of shoring, strutting, planking

over, padding or otherwise as Owner/Engineer may direct, and shall be protected by

the Contractor from damage during the progress of the work. All precautions shall be

taken during excavation and laying operations to guard against possible damage to

any existing structure/pipeline of water, gas, sewage etc.

If the work for which the excavation has been made is not completed by the expected

date of the setting of monsoon as stipulated in “Data Sheet -A” or the setting in of

rain whichever is earlier, or before the day fixed by Owner/ Engineer for filling in

any excavation on account of any festival or special occasion. Contractor shall

backfill such excavation and consolidates the filling.

Utmost care shall be taken to see that the width of the trench at the top of pipe is not

more than that specified in drawing. In case additional width is required it shall be

provided only in the top portion from the ground level up to 300-mm above the top of

pipe. If any extra width is provided in the area below this portion, Contractor shall

have to provide remedial measures in the form of lime concrete or rubble masonry

otherwise at the discretion and to the satisfaction of Owner/Engineer. If rock is met

with, it shall be removed to 15 cm below the bottom of pipes and fittings/specials and

the space resulting shall be refilled with granular materials and properly consolidated.

Bottom of trenches/pits shall be saturated with water well rammed wherever Owner/

Engineer may consider it necessary to do so.

Wherever a socket or collar of pipe or fitting/special occurs, a grip is to be cut in the

bottom of the trench or concrete bed to a depth of at least 75 mm below the bed of the

pipe so that the pipe may have a fair bearing on its shaft and does not rest upon its

socket. Such grip shall be of sufficient size in every respect to admit the hand all

around the socket in order to make the joint and the grip shall be maintained clear

until the joint has been approved by Owner/Engineer.

When welding is to be carried out with the pipes and specials in the trench, additional

excavation of not more than 60 cm in depth and 90 cm in length shall be made at

joints in order to facilitate welding.

The excess excavated material shall be carried away from site of works to a place up

to a distance as directed by Owner/Engineer. This shall be done immediately so as

not to cause any inconvenience to the public or traffic. If the instructions from

Engineer are not implemented within seven days from the date of instructions to cart

the materials and to clear the site, the same shall be carried out by Owner/Engineer

and any claim or dispute shall not be entertained in this respect.

D.6.6 DEWATERING

During the excavation, if subsoil water is met with Contractor shall have to provide

necessary equipment and laborers for dewatering the trenches/pits by bailing out

water or water mixed with clay; if pumping out subsoil water is found to be

necessary, Contractor shall provide sufficient number of pumps for the same. In both

the above cases the excavation shall be done to the required level and the pipes shall

be laid to proper alignment and gradient. Contractor shall also make necessary

arrangement for the disposal of drained water to nearby storm water drain or in a pit

if allowed by Owner/Engineer. In no case the water shall be allowed to spread over

the adjoining area. Before discharging this water into public sewer/drain, Contractor

shall take necessary permission from the local authorities.

D.6.7 SPECIAL FOUNDATION IN POOR SOIL

Where the bottom of the trench and sub-grade is found to consist of material which is

unstable to such a degree that in the opinion of Owner/Engineer, it cannot be

removed and replaced with an approved material thoroughly compacted in place to

support the pipe properly, a suitable foundation for the pipes, consisting of piling,

timbers or other materials, in accordance with relevant drawings and as instructed by

Owner/Engineer shall be constructed.

D.6.8 WOODEN SHORING

Contractor shall suitably design polling bards, walling and struts to meet different soil

conditions that might be encountered in excavating trenches/ pits. The horizontal

and vertical spacing of struts shall be such that not only the sides of trenches shall be

prevented from collapse but also easy lowering of pipe in trenches shall be ensured

without creating undue obstructions for the excavation of the work. Any

inconvenience and/or delay that might be caused in lowering pipes in trenches as a

result of adopting improper spacing of struts by Contractor shall be his sole

responsibility. No part of shoring shall be at any time be removed by Contractor

without obtaining permission from Owner/Engineer. While taking out shoring planks

the hollows of any form must simultaneously be filled in with soft earth well rammed

with rammers and with water.

Owner/Engineer may order portions of shoring to be left in the trenches/pits at such

places, where it is found absolutely necessary to do so to avoid any damage, which

may be caused to buildings, cables, gas-mains, water mains, sewers etc. in close

proximity of the excavation, by pulling out the shoring from the excavations.

Contractor shall not claim, on any reason whatsoever, for the shoring which may

have been left in by him at his won discretion.

D.6.9 STEEL PLATE SHORING

Where the subsoil conditions are expected to be of a soft and unstable character in

trench/pit excavation, the normal method of timbering may prove insufficient to

avoid subsidence of the adjoining road surfaces and other services. In such

circumstances Contractor will be required to use steel trench sheeting or sheet piling

adequately supported by timber struts, walling etc., as per the instructions, manner

and method directed by Owner/ Engineer. Contractor shall supply, pitch, drive and

subsequently remove trench sheeting or piling in accordance with other items of the

D.6.10 BONING STAVES AND SIGHT RAILS

In laying the pipes and fittings/specials the centre for each machinehole/chamber or

pipeline shall be marked by a peg. Contractor shall dig holes for and set up two

posts (about 100 x 100 x 1800 mm) at each machinehole/chamber or junction of

pipelines at nearly equal distance from the peg and at sufficient distances there from

to be well clear of all intended excavation, so arranged that a sight rail when fixed at

a certain level against the post shall cross the centre line of the machinehole/chamber

or pipelines. The sight rail shall not in any case be more than 30m apart.

intermediate rails shall be put up if directed by Owner/Engineer.

Boning staves of 75mm x 50 mm size shall be prepared by Contractor in various

lengths, each length being of a certain whole number of meters and with a fixed tee

head and fixed intermediate cross pieces, each about 300 mm long. The top-edge of

the cross piece must be fixed below the top-edge of the cross piece must be fixed

below the top-edge of the tee-head at a distance equal to the outside diameter of the

pipe or the thickness of the concrete bed to be laid as the case may be. The top of

cross pieces shall indicate different levels such as excavation for pipeline, top of

concrete bed, top of pipe etc. as the case may be.

The sight rail of size 250-mm x 40 mm shall be screwed with the top edge resting

against the level marks. The centre line of the pipe shall be marked on the rail and

this mark shall denote also the meeting point of the centre lines of any converging

pipes. A line drawn from the top edge of one rail to the top edge of the next rail shall

be vertically parallel with the bed of the pipe, and the depth of the bed of pipe at any

intermediate point may be determined by letting down the selected boning staff until

the tee head comes in the line of sight from rail to rail.

The post and rails shall be perfectly square and planned smooth on all sides and

edges. The rails shall be painted white on both sides and the tee-heads and crosspiece

of the boning staves shall be painted black.

For the pipes converging to a machinehole/chamber at various levels, there shall be a

rail fixed for every different level. When a rail comes within 0.60 M of the surface of

the ground, a higher sight-rail shall be fixed for use with the rail over the next point.

The posts and rails shall in no case be removed until the trench is excavated, the pipes

are laid and Owner/Engineer gives permission to proceed with the backfilling.

The type of bedding for pipes shall be as per Drawing and Schedule-B.

D.6.12 LAYING OF PIPES AND FITTINGS/SPECIALS

All precautions shall be taken during excavation and laying operations to guard

against possible damage to any existing structure/pipeline of water, gas, sewage etc.

After excavation of trenches, pipes shall not be lowered unless the dimensions of

trenches and bedding work for pipes at the bottom of the trenches are approved and

measured by Owner/Engineer. Pipes and fittings/specials shall be carefully lowered

in the trenches. Special arrangements such as cranes, tripods with chain pulley block

for lowering the pipes and fitting/specials shall be made by Contractor. In no case

pipes and fittings/specials shall be dropped. Slings of canvas or equally non-abrasive

material of suitable width or special attachment to fit the ends of pipes and

fittings/specials shall be used to lift and lower the coated pipes and fittings/specials.

The pipes and fittings/specials shall be inspected for defects and is rung with slight

hammer preferably while suspended to detect cracks. If doubt persists, further

confirmation shall be done by pouring a little kerosene /dye on the inside of the pipe

at the suspected spot. No sign of kerosene/dyke should appear on the outside surface.

Pipes and fittings/specials damaged during lowering or aligning shall be rejected by

Owner/Engineer.

All the pipes are to be laid perfectly true both in alignment and to gradient specified.

In case of spigot and socket pipe the socket end of the pipe shall face upstream,

except when the pipeline runs uphill in which case the socket ends should face the

upgrade. The laying of pipes shall always proceed upgrade of a slope. After placing

a pipe in the trench, the spigot end shall be centered in the socket and the pipe forced

home and aligned to required gradient. The pipes shall be secured in place with

approved backfill material tamped under it except at the socket. Pipes and

fittings/specials, which do not allow a sufficient and uniform space for joints, shall be

removed and replaced with pipes and fittings/specials of proper dimensions to ensure

such uniform space. Precautions shall be taken to prevent dirt from entering the

jointing space. At times when pipe laying is not in progress, the open ends of pipe

shall be closed by a watertight plug or other means approved by Owner/Engineer.

During the period that the plug is on, the Contractor shall take proper precautions

against floating of the pipe owing to entry of water into the trench. Wherever it is

necessary to deflect pipe from a straight line, either in the vertical or horizontal plane,

to avoid obstructions or where long radius curves are permitted the deflection

allowed at joints shall not exceed 2½%. In case of pipes, with joints to be made with

loose collars, the collars shall be slipped on before the next pipe is laid. The pipes

shall be laid such that the marking on pipes appears at the top of the pipes.

The cutting of pipe for inserting valves, fittings or specials shall be done in a neat and

workman like manner without damage to the pipe so as to leave a smooth end at right

angles to the axis of the pipe. For this purpose, pipe-cutting machine shall be used.

D.6.13 JOINTING

Jointing for pipes and fittings/specials shall be as per IS-783 (latest revision) done in

accordance with the relevant specifications depending upon the type of pipes being

Basic requirements for jointing the pipes are

a) Cleanliness of all parts , particularly joint surface.

b) Correct location of components.

c) Centralization of spigot within socket.

d) Provision of the correct gap between the end of the spigot and the back of the

socket to ensure flexibility at each joint.

e) Any lubricant used shall be approved as to composition and method of

D.6.14 TESTING AND COMMISSIONING

Testing and commissioning of pipes shall be as per IS-783 (latest Revision) clause

15.5 done in accordance with the relevant specifications.

CONTRACTOR'S SIGNATURE ADDL.CITY ENGINEER

& STAMP (North West Zone)

D-7 REINFORCED CEMENT CONCRETE PIPES

SOCKET & SPIGOT

This specification covers the requirements for manufacturing, testing, supplying,

jointing and testing at work sites of Reinforced Cement Concrete (RCC) pipes, of

both pressure and non pressure varieties used for pumping mains and gravity, sewers

and storm water drains. Laying of pipes and fittings/specials are covered in Technical

Specifications: Section-D6. The two parts are complementary and are to be read

together for a correct interpretation of the provisions of this specification.

D.7.1 APPLICABLE CODES

The manufacturing, testing, supplying, jointing and testing at work sites of RCC

pipes shall comply with all currently applicable statutes, regulations, standards and

codes. In particular, the following standards, unless otherwise specified herein, shall

be referred. In all cases, the latest revision of the codes shall be referred to. If

requirements of this specification conflict with the requirements of the codes and

standards, this specification shall govern.

D.7.2 MATERIALS

a) IS: 458 - Specification for precast concrete pipes (with and without reinf.)-2021

b) IS: 3597 -Method of tests for concrete pipes.

c) IS: 5382 -Specification for rubber sealing rings for gas mains, water mains and

d) IS: 516 -Method of test for strength of concrete.

D.7.3 CODE OF PRACTICE

a) IS: 456 -Code of practice for plain and reinforced concrete

b) IS: 783 -Code of practice for laying of concrete pipes

Design of RCC pipes including reinforcement details and the ends of pipes shall be in

accordance with the relevant clauses of IS: 458-2021.

D.7.5 MANUFACTURING

Pipe should be with ISI mark confirming to IS-458-2021. Pipe can be

manufactured by spinning process or by vibrated casting process.

The method of manufacture shall be such that the form and the dimensions of the

finished pipes are accurate within the limits specified in relevant clause of IS:

The surfaces and edges of the pipes shall be well defined and true, and their ends

shall be square with the longitudinal axis. The ends of the pipes shall be further

reinforced by an extra ring of reinforcement to avoid breakage during transportation.

The RCC pipes and rubber rings shall be systematically checked for any

manufacturing defects by experienced supervisors so as to maintain a high standard

Owner/Engineer shall at all reasonable times have free access to the place where the

pipes and collars/rubber rings are manufactured for the purpose of examining and

testing the pipes and collars/rubber rings and of witnessing the test and

All tests specified either in this specification or in the relevant Indian Standards shall

be performed by the supplier/contractor at his own cost and in presence of

Owner/Engineer if desired. For this, sufficient notice before testing of the pipes and

fittings shall be given to Owner/Engineer.

If the test is found unsatisfactory, Owner/Engineer may reject any or all pipes of that

lot. The decision of Owner/Engineer in this matter shall be final and binding on

Contractor and not subject to any arbitration or appeal.

D.7.6 MATERIALS

Cement used for the manufacture of RCC pipes should be OPC and shall confirm to

relevant IS codes.

Aggregates used for the manufacture of RCC pipes shall conform to IS:383. The

maximum size of aggregate should not exceed one-third the thickness of the pipe or

20 mm, whichever is smaller.

Mixing and Curing Water

Water shall be clean, colorless and free from objectionable quantities of organic

matter, alkali, acid, salts or other impurities that might reduce the strength, durability

or other desirable qualities of concrete and mortar.

Reinforcement used for the manufacture of the RCC pipes shall be mild steel Grade I

or medium tensile steel bars conforming to IS: 432 (Part-I) or hard-drawn steel wire

conforming to IS: 421 (Part-2). Reinforcement cages for pipes shall be as per

relevant requirements of IS:

Concrete used for the manufacture of RCC pipes shall conform to IS: 456. The

minimum cement content and minimum compressive strength of concrete shall be as

per relevant requirements of IS:458 (Latest Edition). Compressive strength tests shall

be conducted on 15 cm cubes in accordance with the relevant requirements of IS:

Rubber ring chords used in pipe joints shall be EPDM rubbering as per IS 5382 :

Pipes manufactured in compliance with IS:458 (Latest Edition) shall be either water

cured or steam cured for minimum stipulated curing period in accordance with

relevant requirements of the latest revised IS:458 (Latest Edition).

D.7.8 DIMENSIONS

The internal diameter, wall thickness and length of barrel and collar of pipes,

reinforcement (longitudinal and spiral), type of ends and minimum clear cover to

reinforcement and strength test requirements shall be as per the relevant

clauses/tables of IS: 458 for different classes of pipes.

Table – 3 of IS-458-2021

Design and Strength Test Requirements of Concrete Pipes of Class NP3

Reinforced Concrete, Medium Duty, Non-Pressure Pipes made by spinning process

Internal Barrel Reinforcements Strength Test Requirements

Diameter Wall for Three Edge Bearing Test

of Pipes in Thickness Longitudinal, Mild Spirals, Load to Produce Ultimate

mm Steel or Hard Drawn Hard 0.25 mm Crack Load

Steel Draws kN/linear metre

Minimum Kg/linear Kg/linear kN/linear

number metre metre metre

1. If mild steel is used for spiral reinforcement, the weight specified under col.5 shall be

increased to 140/125.

2. The longitudinal reinforcement given in this table is valid for pipes upto 2.5 m. effective

length for internal diameter of pipe upto 250 mm and upto 3 m. effective length for higher

diameter pipes.

3. Total mass of longitudinal reinforcement shall be calculated by multiplying the values given

in col.4 by the length of the pipe and then deducting for the cover length provided at the two

4. Concrete for pipes shall have a minimum compressive strength of 35 N/mm2 at 28 days.

Table – 5 of IS- 458-2021

Design and Strength Test Requirements of Concrete Pipes of Class NP3

Reinforced Concrete, Medium Duty, Non-Pressure Pipes Made by Vibrated Casting Process

Internal Minimum Reinforcements Strength Test Requirements

Diameter Barrel for Three Edge Bearing Test

of Pipes in Wall Longitudinal, Mild Spirals, Load to Produce Ultimate

mm Thickness Steel or Hard Drawn Hard 0.25 mm Crack Load

Steel Draws kN/linear metre kN/linear

Minimum Kg/linear Kg/linear

number metre metre

Note : Concrete for pipes shall have a minimum compressive strength of 35 N/mm 2 at

Table – 6 of IS-458-2021

Design and Strength Test Requirements of Concrete Pipes of Class NP4

Reinforced Concrete, Heavy Duty, Non-Pressure Pipes

Internal Minimum Reinforcements Strength Test Requirements

Diameter Barrel for Three Edge Bearing Test

of Pipes in Wall Longitudinal, Mild Spirals, Load to Produce Ultimate

mm Thickness Steel or Hard Drawn Hard 0.25 mm Crack Load

Steel Draws kN/linear metre kN/linear

Minimum Kg/linear Kg/linear

number metre metre

Note : 1. If mild steel is used for spiral reinforcement, the weight specified under col.5 shall be

increased to 140/125.

2. The longitudinal reinforcement given in this table is valid for pipes upto 2.5 m.

effective length for internal diameter of pipe upto 250 mm and 3 m. effective length

for higher diameter pipes.

3. Total mass of longitudinal reinforcement shall be calculated by multiplying the

values given in col.4 by the length of the pipe and then deducting for the cover length

provided at the two ends.

4. Concrete for pipes shall have a minimum compressive strength of 35 N/mm2 at

Table – 8 of IS-458-2021

Design and Strength Test Requirements of Concrete Pipes of Class NP4

Reinforced Concrete, Heavy Duty, Non-Pressure Pipes

made by Vibrated casting process

Internal Minimum Reinforcements Strength Test Requirements

Diameter Barrel for Three Edge Bearing Test

of Pipes in Wall Longitudinal, Mild Spirals, Load to Produce Ultimate

mm Thickness Steel or Hard Drawn Hard 0.25 mm Crack Load

Steel Draws kN/linear metre kN/linear

Minimum Kg/linear Kg/linear

number metre metre

Note : Concrete for pipes shall have a minimum compressive strength of 35 N/mm 2 at

The tolerances regarding overall length, internal diameter of pipes or sockets and

barrel wall thickens shall be as per relevant clause of IS:

D.7.9 WORKMANSHIP AND FINISH

Pipes shall be straight and free from cracks except that craze cracks may be permitted.

The ends of the pipes shall be square with their longitudinal axis so that when placed

in a straight line in the trench no opening between ends in contact shall exceed 3 mm

in pipes up to 600 mm diameter (inclusive), and 6 mm in pipes larger than 600 mm

The outside and inside surfaces of the pipes shall be smooth, dense and hard, and

shall not be coated with cement wash or other preparation unless otherwise agreed to

between Owner/Engineer and the manufacturer or supplier.

The pipes shall be free from defects resulting from imperfect grading of the

aggregate, mixing or moulding.

The pipes shall be free from local dents or bulges greater than 3 mm in depth and

extending over a length in any direction greater than twice the thickness of barrel.

The deviation from straight in any pipe throughout its effective length, tested by

means of a rigid straight edge parallel to the longitudinal axis of the pipe shall not

exceed, for all diameters 3 mm forever meter run.

All pipes for testing purposes shall be selected at random from the stock of the

manufacturer and shall be such as would not otherwise be rejected under the criteria

of tolerances as mentioned in IS:458 (Latest Edition).

During manufacture, tests on concrete shall be carried out as per IS:456. The

manufacturer shall supply, when required to do so by Owner/Engineer the results of

compressive tests of concrete cubes and split tensile tests of concrete cylinders made

from the concrete used for the pipes. The manufacturer shall supply cylinders or

cubes for test purposes required by the Owner/Engineer and such cylinders or cubes

shall withstand the tests prescribed by the manufacturer for the hydrostatic test

pressure. For non-pressure pipes, 2 percent of the pipes shall be tested for hydrostatic

The specimen of pipes for the following tests shall be selected in accordance with

relevant Clause of IS:458 (Latest Edition)and tests in accordance with the methods

described in IS:3597.

i) Hydrostatic test

ii) Three edge bearing test

iii) Absorption test

Note: Three edge bearing strength to produce 0.25 mm crack in case of special

design of pipes shall be as per IS:458:2003.

For Inspection at manufacturing site 24 hrs. access shall be provided to AMC

Engineers as well as engineer appointed by PMC/TPI agency. Apart from this AMC

will establish its own pipe testing facility where pipes will be randomly tested. The

cost of transporting the pipe to the testing facility & testing charges shall be borne by

the contractor.

D.7.11 SAMPLING AND INSPECTION

In any consignment, all the pipes of same class and size and manufactured under

similar conditions of production shall be grouped together to constitute a lot. The

conformity of a lot to the requirements of this specification shall be ascertained on

the basis of tests on pipes selected from it.

The number of pipes to be selected from the lot for testing shall be in accordance with

Table 15 of IS:458 (Latest Edition).

Pipes shall be selected at random. In order to ensure randomness, all the pipes in the

lot may be arranged in a serial order and starting from any pipe, every ‘n’th pipe be

selected till the requisite number is obtained, n being the integral part of N/n, where

N is the lot size and n is the sample size.

All pipes selected as per IS : 458 shall be inspected for dimensional requirements,

finish and deviation from straight. A pipe failing to satisfy one or more of these

requirements shall be considered as defective.

The number of pipes to be tested for tests under IS : 458 shall be in accordance with

column 4 of Table 15 of IS:458 (Latest Edition). These pipes shall be selected from

pipes that have satisfied the requirements mentioned in Clause above.

A lot shall be considered as conforming to the requirements of IS:458 (Latest Edition)

of the following conditions are satisfied.

(m) The number of defective pipes shall not be more than the permissible number

given in column 3 of Table 15 of IS:458 (Latest Edition).

(n) All the pipes tested for various tests as per IS-458 shall satisfy corresponding

requirements of the tests.

(o) In case the number of pipes not satisfying requirements of any one or more

tests, one or two further samples of same size shall be selected and tested for

the test or tests in which failure has occurred. All these pipes shall satisfy the

corresponding requirements of the test.

The following information shall be clearly marked on each pipe :

b) Internal diameter of pipe

c) Class of pipe

d) Date of manufacture, and

e) Name of manufacturer or his registered trademark or both.

D.7.13 LAYING OF PIPES

The laying of RCC pipes shall conform to Technical Specifications: Section-D-6.

D.7.14 JOINTING

Jointing of RCC pipes shall be done with OPC cement only and as per the

requirements of following specifications and as per the relevant IS. The type of joints

shall be as below. After jointing, extraneous material, if any, shall be removed from

the inside of the pipe and the newly made joints shall be thoroughly cured. In case,

rubber-sealing rings are used for jointing, these shall conform to IS 5382 and shall be

of such type as mentioned in IS-458:2003.

D.7.15 FLUSH JOINT (INTERNAL)

This joint shall be generally used for culvert pipes of 900-mm diameter and over. The

ends of the pipes are specially shaped to form a self-centering joint with an internal

jointing space 13-mm wide. The finished joint is flush with both inside and outside

with the pipe wall. The jointing space is filled with cement mortar in the proportion

as specified in IS-458-2003, mixed sufficiently dry to remain in position when forced

with a trowel or rammed.

FLUSH JOINT (EXTERNAL)

This joint is suitable for pipes which are too small for jointing from inside. This joint

is composed of specially shaped pipe ends. Each end shall be butted against each

other and adjusted in correct position. The jointing space shall then be filled with

cement mortar as specified in IS-458-2003, sufficiently dry and finished off flush.

Great care shall be taken to ensure that the projecting ends are not damaged as no

repairs can be readily affected from inside the pipe.

SPIGOT AND SOCKET JOINT (FLEXIBLE)

The RCC pipe with the rubber ring accurately positioned on the spigot shall be

pushed well home into the socket of the previously laid pipe by means of uniformly

applied pressure with the aid of a jack or similar appliance. The RCC pipes shall be

of spigot and socket type and rubber rings as specified in IS-458-2003, shall be used,

and the manufacturers instructions shall be deemed to form a part of these

specifications. The rubber rings shall be lubricated before making the joint and the

lubricant shall be soft soap water or an approved lubricant supplied by the

Socket & Spigot NP3 & NP4 pipe with rubber ring roll on joint for diameter upto

mm should be provided as per table 14 pf IS 458 :

Socket & spigot NP3 & NP4 pipe with rubber ring confined joint for diameter

mm to 2200 mm should be provided as per Table -17 of IS 458:2003.

D.7.16 CLEANING OF PIPES

As soon as a stretch of RCC pipes has been laid complete from Machinehole to

Machinehole or for a stretch as directed by Owner/Engineer, contractor shall run

through the pipes both backwards and forwards a double disc or solid or closed

cylinder 75 mm less in diameter than the internal diameter of pipes. The open end of

the incomplete stretch of pipeline shall be securely closed as may be directed by

Owner/Engineer to prevent entry of mud or silt etc.

If as a result of the removal of any obstructions Owner/Engineer considers that

damages may have been caused to the pipelines, he shall be entitled to order the

stretch to be tested immediately. Should such test prove unsatisfactory, contractor

shall amend the work and carry out such further tests as are required by

Owner/Engineer.

It shall also be ascertained by contractor that each stretch from Machinehole to

Machinehole or the stretch as directed by Engineer is absolutely clear and without

any obstruction by means of visual examination of the interior of the pipeline suitably

enlightened by projected sunlight or otherwise.

D.7.17 TESTING AT WORK SITE

After laying and jointing of RCC pipes is completed the pipeline shall be tested at

work site as per the following specifications and as directed by Owner/Engineer. All

equipment for testing at work site shall be supplied and erected by contractor. Water

for testing of pipes shall be arranged by him. Damage during testing shall be

contractor’s responsibility and shall be rectified by him to the full satisfaction of

Owner/Engineer. Water used for test shall be removed from pipes and not released to

the excavated trenches.

After the joints have thoroughly set and have been checked by Owner/Engineer and

before backfilling the trenches, the entire section of the sewer or storm water drain

shall be proved by contractor to be water tight by filling in pipes with water to the

level of 1.50 m above the top of the highest pipe in the stretch and heading the water

up for the period of one hour. The apparatus used for the purpose of testing shall be

approved by Owner/Engineer. Contractor if required by Owner/Engineer shall

dewater the excavated pit and keep it dry during the period of testing. The loss of

water over a period of 30 minutes should be measured by adding water from a

measuring vessel at regular 10 minutes intervals and noting the quantity required to

maintain the original water level. For the approval of this test the average quantity

added should not exceed 1 litre/hour/100 linear metres/10 mm of nominal internal

diameter. Any leakage including excessive sweating which causes a drop in the test

water level will be visible and the defective part of the work should be removed and

In case of pressure pipeline the completed stretch of pipeline shall be tested for site

test pressure as specified in IS-458-2003. The site test pressure should not be less

than the maximum operating pressure plus the calculated surge pressure, but in no

case should it exceed the hydrostatic test pressure as specified in IS:458 (Latest

D.7.18 MEASUREMENT

All RCC pipes shall be measured according to the work actually done and no

allowance will be made for any waste in cutting to the exact length required. The

measurement for pipes shall be in running meter nearest to a cm. of length along the

centre line of pipe as actually laid at work sites.

The rate for providing, laying and jointing of RCC pipes shall be deemed to include

the cost of rubber rings, jointing material, testing and extra excavation required for

ordinary bedding of pipes and also for pipe sockets, if any.

 If any damage is caused to the pipeline during the execution of work or while

cleaning/testing the pipeline as specified. Contractor shall be held responsible for

the same and shall replace the damaged pipeline and retest the same at his own

cost to the full satisfaction of Engineer.

 Water for testing of pipeline shall be arranged by Contractor at his own cost.

 Pipes shall be brought on site proportionate to the required progress for Thirty

CONTRACTOR'S SIGNATURE ADDL.CITY ENGINEER

& STAMP (North West Zone)

D-8 : JUNCTION MACHINEHOLE, SCRAPER MACHINEHOLE, FRC

MACHINEHOLE SEAT AND COVER & VENTILATING COLUMN

D.8.0 MATERIALS :

Water shall conform to M-1, Cement Conform to M-2, Stone coarse aggregate of

mm nominal size shall conform to M-5A, Grit shall conform to M-4, Steel

reinforcement shall conform to M-9-12. Flyash brick shall conform to M-8A,

Cement mortar of specified proportion shall conform to M-6.

Machinehole cover with frame of required size and weight shall be procured by the

D.8.1 WORKMANSHIP :

The machinehole of different types and sizes as specified shall be constructed in

sewer line at such place and to such levels and dimension as shown in drawing or as

Excavation :- The excavation for construction of machinehole including

dismantling of all types of roads surface guarding, barricading, lightening the

trenches, dewatering if required, removing and replacing, shifting of

telephone/electric cables, pipe line etc. and all other safety provisions like shoring

and strutting etc. till refilling of trenches and completion of machinehole

construction, stacking of excavated stuff within the specified lead, back filling of

selected excavated earth, watering and consolidation etc. complete shall be carried

out as per relevant specification of Excavation.

Concrete work :- Brick bats cement concrete (1:5:10) for C.C. channel (1:2:4)

finished, slab in C.C. 1 : 1.5 : 3 by volume with necessary centering and shuttering

work shall be provided. It should be placed deemed and or vibrated and cured as

directed by engineer in charge.

D.8.2 REINFORCEMENT :

All the reinforcement bars shall be accurately placed in exact position shown on the

drawings and shall be securely held in position during placing of of concrete by

annealed No. 1 binding wire not less than 1 mm is size and by using stay block or

chair spacers, metal hangers, supporting wires or other approved devices it

sufficiently close intervals. Bars shall not be allowed to sag between supports nor

displaced during concrete of any other operation of the work. Reinforcement after

being placed in position shall be maintained in a clean condition until completely

embedded in concrete. Special care shall be exercised to prevent any

displacement of reinforcement in concrete already placed. To prevent

reinforcement from corrosion, concrete cover shall be provided as indicated on

Bars shall be bent cold to specified shape and dimensions or as directed, attain proper

radius of bends, Bars shall not be bent or straightened in a manner that will injure the

material. Bars bend during transport of handling shall be straightened before being

used on the work. Unless other wise specified for mild steel a `U' type hook at the

end of each bar shall invariably be provided to main reinforcement.

In case which are not round and in case of deformed bars, the diameter shall be

taken as the diameter of circle having an equivalent effective area. The cold twisted

steel bars shall be used or without hooks at the ends. Deformed bars without hooks

shall however, comply with relevant anchorage requirements.

Bars crossing each other where required shall be secured by binding wires

(annealed) of size not less than 1 mm in such a manner that they do not slip over

each other at the time of fixing and concreting.

As far as possible bars of full length shall be used. In case this not possible

overlapping of bars shall be done as directed. The overlaps shall be staggered for

different bars and located at points along the span where shear not bending moment

When permitted or specified on the drawings joints of reinforcement bars

shall butt welded so as to transmit their full stresses. Welded joints shall preferably

located at points when steel will not be subject to more than 75 percent of the

maximum permissible stresses and welds so staggered that at any one section not

more than 20 percent of the rods are welded. It shall be ensured that no voids are

left in welding and when welding is done in two or three stages, previous surface

shall be cleaned properly. Ends of the bars shall be cleaned of all loose scale, rust,

grease, paint and other foreign matter before welding. Only competent welders shall

be employed on the work.

D.8.3 BRICK MASONARY WORK :

Before masonary is to be laid on concrete footing the top of concrete shall be

cleaned and moistened. The contractor shall obtain the Engineer's approval for one

foundation, bed, before foundation masonary is started.

Wetting of Bricks : The brick required for masonary shall be throughly wetted with

clean water for amount two hours before use or as directed. The cassation of

bubbles, when the bricks are wetted with water is an indication of through wetting

Brick shall be laid in English bond unless directed otherwise. Half or out bricks shall

not be used except when necessary to complete to bond. Closers in such case shall

be cut to required size and used bear the ends of walls.

A layer of mortar shall be spread on full width for suitable length of the lower course,

each brick shall first be properly bedded and set home by gently tamping with handle

of trowel of wooden mallet. Its inside face shall be flushed with mortar the next

brick is laid and pressed again it. On completion of course, the vertical joints

shall be fully sealed from the top with mortar.

The wall shall be taken up truly in plumb. All corners shall be laid truly horizontal

and all vertical joint shall be truly vertical. Vertical joints in alternate course shall

generally be directly one over the other. The thickness of brick course shall be kept

The bricks shall be laid with from up wards. A set of tools comprising of wooden

straight edges, monsoon spirit level, square half meter rub, and pins string and

plumb shall be kept on the site of work for frequent checking during the progress of

Both the faces of walls of thickness greater than 23 cms. shall be kept in proper

place. All the connected brick work shall be kept not more than one meter over the

rest of the work. Where this is not possible the work shall be raked back according

to bond (and not left toothed) at an angle not stoper than 45 degrees.

All fixtures like pipe inlet and outlet, PVC steps, machinehole cover and frame etc.

which are required to be built in wall shall be embeded in cement mortar.

Brick shall be so laid that all joints shall not exposed 12 mm. The face joints shall be

raked out as directed by raking tool daily during the progress of work, when the

mortar in still green so as to provided key for plaster or ponting to be done.

For the face of brick work, plastering is to be done joints shall be racked out to a

depth not less than thickness of joints. The face of brick work shall be cleaned

and mortar dropping removed on very same day that brick work is laid.

D.8.4 PLASTER WORK :

The surface shall be cleaned of all dust, loose mortar droppings, traces of algae

afflorseence and other foreign mortar by water or by brushing. Smooth surface shall

be roughened by wire brushing of it is not hard any by backing if it is har. In case

of concrete surface, if a chemical retarder has been applied to the form work. The

surface shall be roughened by wire brushing and all the resulting dust and loose

particles cleaned off and care shall be taken that done of the reerarders is left on the

surface. Trimming of projections on brick/concrete surface where necessary shall

be carried out to get an even surface.

The work shall be soaked but only damped evenly before applying the plaster. If the

surface become dry, such areas shall be moistened again.

The plaster about 15 x 15 cms. shall be first applied horizontally and vertically

at not more than 2 meters intervals over the entire surface to serve as gauge. The

surface of these gauges shall be truly in plane of the finished plastered surface.

The mortar shall than be applied in uniform surface slightly more than the

specified thickness, then brought to a true surface be working a wooden straight

edge reaching acress the gauges with small upward and sideways movements at a

time. Finally, the surface shall be finished off true with a trowel of wooden float

accordingly excessive trowelling of over working the float shall be avoided. All

corners arrises angles and junctions shall be truly vertical of horizontal as the case

may be and shall be carefully finished. Rounding or chambering conners, arrises

junctions etc. shall be carried out with proper templates the size required.

Cement mortar for plaster shall be used within half an hour after addition of

water. And mortar for plaster which is partially set shall be rejected and removed

forthwith from the site.

In suspending the work at the end of the day, the plaster shall be left out clean to the

line both horizontally and vertically, when recommending the plaster the edge of the

old work shall be scraped clear and wetted with cement putty before plaster is

applied to the adjustment areas to enable the two to properly together. Plastering

work shall be closed at the end of the day on the body of the wall and nearer than

cm. to any corners of arises. It shall not be closed on the body of features such as

plaster bends and cornices not at the corners or arises. Horizontal joints in

plaster work shall not also occure on walls and copings these invariably leads to

leakage. No portion of the surface shall be deft out initially to be packed up latter

D.8.5 FIXING OF M.S. STEEL HDPE COATED STEPS AND MACHINEHOLE

During the construction of masonary wall of the machinehole the cement mortar of

required proportion shall be used for embedding the M.S Steel HDPE coated steps in

the wall masonary. The spacing of steps in the masonary shall be 300 mm centre

to centre in the staggered position in the vertical direction with two staggered

rows at 385 mm centre to centre in the horizontal direction the top of the

machinehole shall not be more than 300 mm above the benching and the centre line

of two staggered raws shall be the centre line of the shorter side of machinehole

frame in the roof of chamber.

During fixing of the steps, the wall should not be damaged and shall not vibrate or

shall not shake during ascents and descents otherwise they shall have to be

refixed correctly as per the drawings or as mentioned above.

Machinehole frame shall be firmly and securely laid on top of shafts of conical tops

in 25 mm thick cement mortar and shall be embeded in 200 mm the cement

concrete of proportion 1:2:4 (1 Cement : 2 coarse sand : 4 Kapchi as aggregate of

mm nominal size) in such a way that the top of M.H. frame shall be flush with

concrete surface and top surface neatly finished 15 mm thick with cement mortar

1:3 in conformity with ground or road levels.

D.8.6 OTHER REQUIREMENTS :

As per line and level and size of the machinehole pit shall be excavated as per

drawing or as ordered by the Engineer.

The foundation concrete 1:5:10 with required thickness as per drawing or as

directed shall be laid after compacting the bottom of the pit. The cement concrete

shall conform to specified specification of Cement Concrete.

The clear inside chamber size of opening shall be as per the drawing or as directed

by the Engineer-in-charge.

The masonary wall shall be plastered inside with 15 mm thick 1:3 cement mortar and

outside 15 mm thick in C.M. (1:3) above coping level. The off set for the concrete

foundation shall be 300 mm on all sides beyond walls of chamber.

Whenever pipes enter or leave the masonary chamber bricks on edge must be so

laid around the upper half of the pipes so as to form the arch to prevent the weight of

the masonary chamber over it.

On the top of masonary walls 1:5 cement mortar shall be laid and then R.C.C. slab of

grade 1:2:4 necessary and as directed by the Engineer with coarse aggregate of trap

metal of 20 mm nominal shall be laid necessary from work and centering shall have

to be provided by the contractor at his own cost as per relevant specification of

cement concrete.

In the bottom of machinehole the channel and benching shall be done in C.C. 1:2:4

(1 Cement : 2 Coarse sand : 4 graded stone aggregate of 20 mm nominal size)

rising at a step in line from edge of the channel, the channel of the bottom of the

chamber shall be plastered 15 mm thick in C.M. 1:3 (1 Cement : 3 fine sand) and

steel trowel smooth.

Channels shall be in semi circular in the bottom half and a diameter equal to the

sewer. Above the horizontal diameter, the side shall be extended vertically to the

same level as the crown of the out going pipe and the top edge shall be suitably

rounded off. The branch channels shall also be similarly constructed with respect

to the benching but at their junctions with the main channel an appropriate fall

suitably rounded off in the direction of flow in the main channel shall be given.

For conical shaft of machinehole necessary conical portion shall be treated from

750 mm below the bottom of concrete of slab for fixing of machinehole cover and

The item includes curing of all the cement work for 14 days.

D.8.7 MODE OF MEASUREMENTS & PAYMENTS :

Payment shall be made on the basis as per number of masonary machineholes

chamber Constructed with all constructing materials labours, excavation refilling

curing, finishing, providing and fixing M.S Steel HDPE coated steps, constructing

laying half round gutter, fixing R.C.C. machinehole cover etc. complete in all

The item will be paid per No. of construction of complete masonary machinehole

chamber as shown in the drawing upto the depth specified and shown in the type

design drawing.

The measurements shall be made for such number of chambers construction. The

surplus excavated stuff shall be disposed of as directed by Engineer-in-charge.

The depth of machineholes shall be the distance between the top of machinehole

and the invert level of the main drain. The rate includes all labours, materials, tools

and plant etc. required for satisfactory completion of this item as directed above.

The item includes :-

(i) Excavation for machinehole

(ii) Bed concrete, slab concrete and copping with necessary reinforcement.

(iii) Necessary brick work with cement plaster inside and outside.

(iv) Providing and fixing M.S Steel HDPE coated steps

(v) Carting, conveying and fixing of machinehole frame cover with necessary

concrete and finishing.

(vi) Refilling with necessary watering and consolidation.

(vii) Curing for 14 days.

D.8.8 FIBRE REINFORCED CONCRETE :

Frame and Cover – The fibre reinforced concrete frame and cover shall be

mm dia. Heavy duty type (circular-HD-20) as per IS:12592-2002. The dimensions

of frame shall as per table-1 of clause 5.2 of IS-12592. The load test shall be as per

table-2 of IS : 12592-2002.

Table No. 2 – Test Load and Diameter of Block

Grade of Type Load Diameter of

LD-2.5 Rectangular, square or circular 25

MD-10 Rectangular or circular 100

HD-20 Rectangular, square or circular 200

EHD-35 Rectangular, square or circular 350

The cover should have suitable lifting arrangement. The FRC frame and cover shall

be paid on number basis of completed item at site.

D.8.9 PRECAST RCC MACHINEHOLE:

The Precast RCC Machinehole should be constructed in RCC M 40 grade concrete.

Specifications for material used for Precast machinehole shall be as per detail

specification of material. Specification for concrete work and reinforcement work

shall be as per D-9. For all the requirement of Precast reinforced concrete

machineholes shall be as per ASTM Designation : C478-09 should be followed. The

payment shall be made on number basis. The same rate shall be applicable for depth.

+ 0.5 m. than mentioned in the item.

D.8.10 MILD STEEL VENTILATING COLUMN

Vent column shall be erected at such places as shown on relevant drawings (the

detailed drawings will be furnished during execution of the work) and as directed by

the Engineer-in-charge.

Mild steel Vent Column

Mild steel vent column shall be of 150 mm diameter and 12 m. height from ground

level with C. I. Ornamental cap. This shall be fixed firmly and encased in cement

concrete of M15 grade as shown on relevant drawing with necessary mild steel bolts,

plates etc. for foundation. The Vent Column shall be painted with one coat of silver

paint over one coat of red lead oxide paint. The Vent Column shall be connected to

machinehole by 150 mm diameter glazed stoneware pipe encased by M10 concrete of

150 mm thickness all around as per drawing and as directed by Engineer-in-charge.

Jointing Stoneware Pipes

The salt glazed stoneware pipes and fittings shall conform to IS : 651. The spigot and

socket joints of stoneware pipes shall be of rigid type and shall be caulked with tarred

gasket (prepared ready for use before being brought on the work) in one length for

each joint and sufficiently long to entirely surround the spigot end of the pipe. The

gasket should be driven upto one fourth depth of socket by means of caulking tools.

After the pipes are thoroughly cleaned and moistened, mixture of one part of cement

and one part of clean fine sand tempered with just sufficient water to have a

consistency of semi-dry condition should be foreced into the joint and well rammed

with caulking tools, so that the whole space around the spigot and socket is

completely filled with lightly caulked mortar and the joints shall be finished off with

a splayed fillet sloping at 45 degrees to the side of the pipe. The joint shall be

thoroughly cured. The laying, jointing and testing of stoneware pipes and fittings

shall be as per IS :

The rate quoted in Schedule of Quantities and Rates for mild steel Vent Column shall

deem to include the cost of Vent Column with C. I. Ornamental cap and / or base

including M. S. bolts and plates, necessary excavation, dewatering, backfilling,

foundation, stoneware pipe connection to machinehole inclusive of concrete

encasement, painting, erecting etc. complete. The measurement for Vent Column

shall be per number basis. The measurement for Vent Column shall be per number

If any damage is caused to the other services such as water supply pipeline, sewer,

cable etc. during the construction of machineholes and erection of Vent Columns,

Contractor shall be held responsible for the same and shall replace the damaged

services at his own cost to the full satisfaction of the Engineer-in-charge.

CONTRACTOR'S SIGNATURE ADDL.CITY ENGINEER

& STAMP (North West Zone)

D-9 : CONCRETE WORKS

D.9.1.1 This Specification covers the general requirements for concrete using on-site production

facilities including requirements in regard to the quality, handling, storage of ingredients,

proportioning, batching, mixing, transporting, placing, curing, protecting, repairing,

finishing and testing of concrete; form work; requirements in regard to the quality,

storage, bending and fixing of reinforcement; grouting as well as mode of measurement

and payment for complete works.

D.9.1.2 It shall be very clearly understood that the specifications given herein are brief and do not

cover minute details. However, all work shall have to be carried out in accordance with

the relevant standards and codes of practices or in their absence in accordance with the

best accepted current engineering practices or as directed by Engineer from time to time.

The decision of Engineer as regards the specification to be adopted and their

interpretation and the mode of execution of work shall be final and binding on Contractor

and no claim whatsoever will be entertained on this account.

D.9.2 APPLICABLE CODES AND SPECIFICATIONS

D.9.2.1 The following specifications, standards and codes, including all official amendments /

revisions and other specifications and codes referred to therein, should be considered a

part of this specification. In all cases the latest issue / edition / revision shall apply. In

case of discrepancy between this specification and those referred to herein below or other

specifications forming a part of this bid document, this specification shall govern.

D.9.2.2 Code for Materials

1. IS : 269 - Specification for 33 grade ordinary portland cement

2. IS : 455 - Specification for portland slag cement

3. IS : 1489 - Specification for portland pozzolana cement

4. IS : 8112 - Specification for 43 grade ordinary portland cement.

5. IS : 12330 - Specification for sulphate resisting portland cement

6. IS : 383 - Specification for coarse and fine aggregates from

natural sources for concrete.

7. IS : 432 - Specification for mild steel and medium tensile steel

(Part 1 and 2) bars and hard drawn steel wires for concrete

8. IS : 1786 - Specification for high strength deformed steel bars

and wires for concrete reinforcement.

9. IS : 1566 - Specification for hard drawn steel wire fabric for

concrete reinforcement.

10. IS : 9103 - Specification for admixtures for concrete.

11. IS : 2645 - Specification for integral cement water proofing

12. IS : 4990 - Specification for plywood for concrete shuttering

13. IS : 12269 - Specification for 53 grade ordinary portland cement.

D.9.2.3 Code for Material Testing

1. IS : 4031 - Methods of physical tests for hydraulic cement.

(Parts 1 to 15)

2. IS : 4032 - Methods of chemical analysis of hydraulic cement.

3. IS : 650 - Specifications for standard sand for testing of

4. IS : 2430 - Methods for sampling of aggregates for concrete.

5. IS : 2386 - Methods of test for aggregates for concrete.

6. IS : 3025 - Methods of sampling and test (physical and

chemical) water used in industry.

7. IS : 6925 - Methods of test for determination of water soluble

chlorides in concrete admixtures.

D.9.2.4 Code for Materials Storage

1. IS : 4082 - Recommendations on stacking and storing of

construction materials at site.

D.9.2.5 Code for Concrete Mix Design

1. IS : 10262 - Recommended guidelines for concrete mix design.

2. SP : 23 - Handbook on Concrete Mixes.

D.9.2.6 Code for Concrete Testing

1. IS : 1199 - Method of sampling and analysis of concrete.

2. IS : 516 - Method of test for strength of concrete

3. IS : 9013 - Method of making, curing and determining

compressive strength of accelerated cured concrete

test specimens.

4. IS : 8142 - Method of test for determining setting time of

concrete by penetration resistance.

5. IS : 9284 - Method of test for abrasion resistance of concrete.

6. IS : 2770 - Methods of testing bond in reinforced concrete.

D.9.2.7 Code for Equipment

1. IS : 1791 - Specification for batch type concrete mixers.

2. IS : 2438 - Specification for roller pan mixer.

3. IS : 4925 - Specification for concrete batching and mixing plant.

4. IS : 5892 - Specification for concrete transit mixer and agitator.

5. IS : 7242 - Specification for concrete spreaders.

6. IS : 2505 - General Requirements for concrete

vibrators : Immersion type.

7. IS : 2506 - General Requirements for screed board concrete

8. IS : 2514 - Specification for concrete vibrating tables.

9. IS : 3366 - Specification for pan vibrators.

10. IS : 4656 - Specification for form vibrators for concrete.

11. IS : 11993 - Code of practice for use of screed board concrete

12. IS : 7251 - Specification for concrete finishers.

13. IS : 2722 - Specification for portable swing weigh batchers for

concrete (single and double bucket type).

14. IS : 2750 - Specification for steel scaffoldings.

D.9.2.8 Codes of Practice

1. IS : 456 - Code of practice for plain and reinforced concrete.

2. IS : 457 - Code of practice for general construction of plain and

reinforced concrete for dams and other massive

3. IS : 3370 - Code of practice for concrete structures for storage of

(Parts 1 to 4) liquids.

4. IS : 3935 - Code of practice for composite construction.

5. IS : 2204 - Code of practice for construction of reinforced concrete

6. IS : 2210 - Criteria for the design of reinforced concrete shell

structures and folded plates.

7. IS : 2502 - Code of practice for bending and fixing of bars for

concrete reinforcement.

8. IS : 5525 - Recommendation for detailing of reinforcement in

reinforced concrete works.

9. IS : 2751 - Code of practice for welding of mild steel plain and

deformed bars used for reinforced concrete

10. IS : 9417 - Specification for welding cold worked bars for

reinforced concrete construction.

11. IS : 3558 - Code of practice for use of immersion vibrators for

consolidating concrete.

12. IS : 3414 - Code of practice for design and installation of joints in

13. IS : 4326 - Code of practice for earthquake resistant design and

construction of building.

14. IS : 4014 - Code of practice for steel tubular scaffolding.

15. IS : 2571 - Code of practice for laying in-situ cement concrete

16. IS : 7861 - Code of practice for extreme weather concreting.

(Part – 1) - Recommended practice for hot weather concreting.

(Part – 2) - Recommended practice for cold weather concreting.

D.9.2.9 Code for Construction safety

1. IS : 3696 - Safety code for scaffolds and ladders.

(Parts I and III)

2. IS : 7969 - Safety code for handling and storage of building

3. IS : 8989 - Safety code for erection of concrete framed

D.9.2.10 Code for Measurement

1. IS : 1200 - Method of measurement of building and engineering

(Part 1 to 28) works.

2. IS : 3385 - Code of practice for measurement of Civil

Engineering works.

D.9.3.1 Engineer shall have the right at all times to inspect all operations including the sources of

materials, procurement, layout and storage of materials, the concrete batching and mixing

equipment, and the quality control system. Such an inspection shall be arranged and

Engineer’s approval obtained, prior to starting of concrete work. This shall, however, not

relieve Contractor of any of his responsibilities. All materials which doe not conform to

this specification shall be rejected.

D.9.3.2 Materials should be selected so that they can satisfy the design requirements of strength,

serviceability, safety, durability and finish with due regards to the functional

requirements and the environmental conditions to which the structure will be subjected.

Materials complying with codes / standards shall generally be used, other materials may

be used after approval of the Engineer and after establishing their performance

suitability based on previous data, experience or tests.

D.9.4 MATERIALS

D.9.4.1.1 Unless otherwise specified or called for by the Engineer, cement shall be Ordinary

Portland cement (latest edition) for entire work.

D.9.4.1.2 Where Portland pozzolana or slag cement are used, it shall be ensured that consistency of

quality is maintained, there will be no adverse interactions between the materials and the

finish specified is not marred.

D.9.4.1.3 Only one type of cement shall be used in any one mix. The source of supply, type or

brand of cement within the same structure or portion thereof shall not be changed without

approval from Engineer.

D.9.4.1.4 Cement which is not used within 90 days from its date of manufacture shall be tested at a

laboratory approved by Engineer and until the results of such tests are found satisfactory,

it shall not be used in any work.

D.9.4.2 Aggregates (General)

D.9.4.2.1 General

D.9.4.2.1.1“Aggregate” in general designates both find and coarse inert materials used in the

manufacture of concrete (vide BIS 456 & BIS 383) and conforming to tests as per BIS

2386 (Part I to VI).

D.9.4.2.1.2“Coarse Aggregate” is aggregate most of which is retained when passed through on

D.9.4.2.1.3All fine and coarse aggregates proposed for use in the works shall be subject to the

Engineer-in-Charge’s approval and after specific materials have been accepted, the

source of supply of such materials shall not be changed without prior approval of the

Engineer-in-charge.

D.9.4.2.1.4Aggregates shall consist of crushed stone from a source known to produce satisfactory

aggregate for concrete and shall be chemically inert, non-flaky, strong, hard, durable

against weathering, or limited porosity and free from deleterious materials that may cause

corrosion of the reinforcement or may impair the strength and or durability of concrete.

The grading of aggregates shall be such as to produce a dense concrete of specified

strength and consistency that will work readily into position without segregation and

shall be based on the “mix design” and preliminary tests on concrete specified later. The

aggregates shall be brought from the source as mentioned in Volume–I Clause C.1.39.

D.9.4.2.2 Sampling and testing

D.9.4.2.2.1Samples of the aggregates for mixed design and determination of suitability shall be

taken under the supervision of the Engineer-in-charge and delivered to the laboratory,

well in advance of the scheduled placing of concrete. Records of tests, which have been

made on proposed aggregates and on concrete made from this source of aggregates shall

be furnished to Engineer-in-charge in advance of the work, for use in determining

aggregate suitability. The costs of all such tests, sampling etc. shall be borne by the

D.9.4.2.3 Storage of aggregates

D.9.4.2.3.1All coarse and fine aggregates shall be stacked separately in stock piles in the material

yard near the work site in bins properly constructed to avoid inter mixing of different

aggregates. Contamination with foreign material and earth during storage and while

heaping the materials shall be avoided. The aggregates must be of specified quality not

only at the time of receiving at site but more so at the time of loading into mixer. Rakers

shall be piled in layers not exceeding 1.20 m in height to prevent coning or segregation.

Each layer shall cover the entire area of stock pile before succeeding layers are started.

Aggregates that have become segregated shall be rejected.

D.9.4.2.4 Specific Gravity

D.9.4.2.4.1Aggregates having a specific gravity below 2.4 (saturated surface dry basis) shall not be

D.9.4.3 Fine Aggregate

D.9.4.3.1 Fine aggregate shall consist of natural or crushed sand conforming to IS 383 conforming

to tests as per IS 2386 part I to IV. The sand shall be clean, sharp, hard, strong and

durable and shall be free from dust, vegetable substances, adherent coating, clay, alkali,

organic matter, mica, salt or other deleterious substances, which can be injurious to the

setting qualities / strength/ durability of concrete.

D.9.4.3.2 Screening and Washing : Sand shall be prepared for use by such screening or washing, or

both, as necessary, to remove all objectionable foreign matter while separating the sand

grains to the required size fraction.

D.9.4.3.3 Foreign Material limitations : The percentage deleterious substances in sand delivered to

the mixer shall not exceeding the following :

Sr. Foreign Material Percentage by weight

No. Uncrushed Crushed

1 Material finer than 75 micron IS sieve 3.0