Piyaj dharoi pipeline based Vijapur RWSS Ta:-Vijapur Dist:-Mehsana.

Estimated Cost: Rs. 1402385=39

Executive Engineer

Gujarat Water Supply & Sewerage Board

P.H. Works Division, MEHSANA

Volume-III, PRICE BID VKV RWSS

Name of Work:- “Repairing of Inlet pipe and flooring C.C. work in ESR at

Sardarpur, Fudeda and Hirpura Headworks Under M & R of Vijapur RWSS”

The bidder shall quote his firm and fixed price for the entire work under this

Contract, defined in more details in various sections of this bid document.

(1) The rates and prices shall be submitted in the electronic formats given by

n-procure which is called Schedule-B. Rates and prices received in any

other formats will be rejected and the Bids will be disqualified.

(2) It will be entirely at the discretion of the Employer to accept or reject

the bidder’s proposal, without giving any reasons whatsoever and the

bidder shall not be permitted to withdraw his bid on this account.

to be free supplied from the by client.

(4) In Schedule-B the Bidder shall quote prices for the items on lump sum /

unit rate as called for against the BOQ item.

quoted in Schedule-B only will be considered for price evaluation & shall

form a part of the Contract Agreement.

comparison and evaluation.

(7) The Bidder shall quote his prices for Operation & Maintenance in

Schedule-C. Bidder shall give year wise break up of cost for 5 years O&M

in Schedule-C/1 to Schedule-C/5 separately for Schedule-C. The total

shall be inline to the price quoted in Schedule-C. The total shall be

carried forward to Schedule-B for comparison and evaluation.

(8) Wherever for a particular item the quantities have been specified

payment shall be on unit rate basis and unit variation in quantity will be

paid with pro rata basis.

(9) Each item is to be individually priced online and the amounts shall be

the Schedules of prices shall be left blank except where the item

description requires the item to be priced on "as applicable” basis. The

item shall not be priced if it is “not applicable” to the bidder’s design, in

which case the bidder shall add the words “NOT APPLICABLE”. The

wording in the item description is for subject matter guidance only;

clause references are indicative only and all other relevant clauses shall

also be referred to. The prices shall allow for all the works covered under

the bid and all liabilities and contractual obligations whether separately

specified or not. Items against which no prices are quoted shall not be

separately paid for and the bidder shall be deemed to have covered the

Volume-III, PRICE BID VKV RWSS

cost of execution of such items (according to the requirements of the bid

document) in the prices quoted for other items.

executed for satisfactory working/safety of the system as specified, will

not be separately paid for by the Employer when executed and shall be

deemed to be already covered by other items and rates listed in the price

sheets No extra payment shall be given for any item which is required to

complete and perform the project.

fixed, during the pendency of the Contract. In case of any discrepancy

of the successful bidder shall be corrected accordingly. Only Price

Schedule–B after carried over and arithmetic corrections if any will be

considered for financial evaluation of the bid.

(12) Schedule ‘D gives the basis of interim payment for construction of civil

(13) The bidder shall be deemed to have allowed in his price for provision,

maintenance and final removal of all temporary works of whatsoever

nature required for construction including temporary bunds, diverting

water, pumping, de-watering etc. for the proper execution of works. The

rates shall also be deemed to include any works and setting out that may

be required to be carried out for laying out of all the works involved.

(14) Prices shall be filled online only.

Contract, the Specifications and other sections of these bid documents

and these documents are to be taken as mutually explanatory of one

(16) The bidder shall interpret the data furnished and carry out any additional

survey work, or investigation work required at his own cost.

(17) The prices quoted shall also include the cost of materials utilized for

(18) The bidder should acquaint himself with the site conditions including the

access to Work site. The successful bidder shall have to make suitable

access to work sites at his own cost. These accesses will be used by the

other contractors working for GWSSB.

only and the prices shall include all the equipments / materials /

accessories and services required as per the specifications. The bidder

(20) The amount to be quoted for O & M / year shall be as per Volume-II,

General Conditions of Contract, Clause No. 1, and Security Deposit.

(21) 1% of the value of work will be deducted from the Running bill against

labour cess which is non refundable.

(22) Third Party Inspection / CSC agency will be deployed by GWSSB and

charges of the same will be borne by GWSSB.

Volume-III, PRICE BID VKV RWSS

(23) Any expenditure incurred by inspection/ CSC agency for the work

misinformed by the contractor and charges of inspection/ CSC agency

without any work due to misinformation shall be recovered from the

(24) The rates quoted shall be exclusive of GST, but inclusive of all other

taxes, duties which shall not be paid extra. While GST will be paid for

admissible part of actual work done at the approved tender rates and

tender conditions of price variations. GST shall be paid as per prevailing

rates at the time of payment. The TDS shall be deducted at source as per

provision of IT rules and GWSSB Policy.

(25) The rates should be quoted exclusive of GST but inclusive of all other

taxes as per Volume-1 (B), General Conditions of Contract, Clause No.

(26) The process requires that the bidder shall quote his price for the work

prices shall remain firm and fix during the entire period of performance of

the contract except price variation allowed for supply of MS/DI/PVC/GI

pipe as per Volume-II Clause No. 59, General Conditions of Contract.

(27) Payment shall be made for the components for which lump sump prices

are quoted, as per the schedule of payment. Total cost will be worked out

on the basis of work done of individual items and rates quoted against

those particular items only.

(28) Royalties: The contractor shall be liable to pay the royalty of the

quarried materials/ minerals used in the construction of works at the

rates specified in the Narmada Water Resources, Water Supply & Kalpsar

Dept. Resolution No. GEN-2010-595- (6)- M.I.Cell ( K-1) Dt. 29-4-2011 (

Gujarati Version Copy enclosed) and shall be recovered from the running

bills of the work from time to time and remaining amount if any shall be

recovered from the final bill before releasing the security deposit of the

work. The contractor shall furnish the statement showing the quantity of

quarried materials / minerals from whom purchased ( with full address of

the seller) and copies of the bills for purchase to the Executive Engineer

of the in charge of the work. The contractor shall also furnish such

additional information as regards royalty payment to the competent

(29) Agency shall have to take Insurance policy and intimate to GWSSB along

with the evidence within time limit. In case of non compliance entire

responsibility shall be rest with the agency and required amount shall be

recovered from any due amount of the agency.

(30) GWSSB can recover penalty amount from the agency for not taking the

insurance. Though the penalty amount is recovered, responsibility of the

agency for taking insurance shall be continued and will not be escaped

from the responsibility.

(31) The contractor shall apply fair means of stock maintenance and shall

adopt accounting standard as may be prescribed under GST Act as

applicable in the state of Gujarat. For arriving at the difference in

procurement prices due to introduction of GST it will be open for the

Board to ask for original invoices, lorry receipt, weigh bridge slips,

Volume-III, PRICE BID VKV RWSS

payment details and such other documents as may be required for the

(32) The claim of contractor regarding GST shall have to be backed by

documentary evidence substantiating the actual payment of tax duly

certified by the competent tax authority. The final decision regarding the

quantum of claim amount to be recovered or reimbursed shall be of the

competent authority of the GWSSB and shall be binding on the contractor.

Signature of contractor Executive Engineer

Public Health Works Division

Volume-III, PRICE BID VKV RWSS

Bidders are required to fill up all the blank spaces in this Bid Form.

THE EXECUTIVE ENGINEER,

PUBLIC HEALTH WORKS DIVISION,

SUB: “Repairing of Inlet pipe and flooring C.C. work in ESR at Sardarpur, Fudeda

and Hirpura Headworks Under M & R of Vijapur RWSS”

The bidder shall quote his firm and fixed price for the entire work under this

Contract, defined in more details in various sections of this bid document.

1. Having visited the site and examined the Bid Documents, Drawings, Conditions of

execution of the above Contract, we the undersigned offer to design, Engineer,

procure, construct, complete, commission, operate and maintain the whole of

the said works for 2 years from the date of commissioning including defects

liability period as given in Conditions of Contract and in conformity with the

Annexure, Bidding Documents, including Addenda Nos.__________ (insert

numbers) for Lump sum fixed price of Rs._________________.

Rupees_____________________________________________) for Construction

including free trial run for three months or such other sum as may be ascertained

in accordance with the conditions.

2. I/We agree that

a) if we fail to provide required facilities to the Employer’s representative or any

other person/Agency by the Employer to perform on his behalf for carrying out

the inspection and testing of materials and workmanship.

b) if we incorporate into the Works, materials before they are tested and approved

by the Engineer’s representative.

c) if we fail to deliver pure water of required quantity according to the

conditions/stipulations of the Contract, the Engineer will be at liberty to take

any action including termination of Contract and impose at his absolute

discretion any penalties, and/or reject the work.

3. We undertake, if our Bid is accepted, to complete and deliver the works in

accordance with the Contract within 15 months, inclusive of monsoons, from the

date or receipt of Letter of Acceptance issued to us by you.

Volume-III, PRICE BID VKV RWSS

4. We agree to abide by this Bid for a period of 180 days from the Last date of

submission of the bill and it shall remain binding upon us and may be accepted at

any time before the expiry of that period.

5. In the event of our Bid being accepted, we agree to enter into a formal Contract

Agreement with you incorporating the conditions of Contract there to annex but

until such agreement is prepared this Bid together with your written acceptance

thereof shall constitute a binding Contract between us.

6. We agree, if our Bid is accepted, to furnish performance /Security in the forms

and of value specified in the Clause 1 of Volume-II, “General Conditions of

7. We have independently considered the amounts of liquidated damages shown in

Appendix to Bid and agree that they represent a fair estimate of the damages

likely to be suffered by you in the event of the work not being completed by us

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

(Name of the Person)

Company Seal _____________________

Duly authorized to sign Bid for and on behalf of (fill in block capitals)

Witness Signature ___________________________

Volume-III, PRICE BID VKV RWSS

NAME OF SCHEME – Piyaj Dharoi Pipeline Based Vijapur RWSS Ta:-Vijapur Dist:-Mehsana

Name of Work:- “Repairing of Inlet pipe and flooring C.C. work in ESR at

Sardarpur, Fudeda and Hirpura Headworks Under M & R of Vijapur RWSS”

The bidder shall quote his firm and fixed price for the entire work under this

Contract, defined in more details in various sections of this bid document.

Schedule showing the approximately the materials to be supplied to the contractor

from government stores for the work to be executed and the rate at which they are

Rate at which the material

Place of Delivery

Sr. will be charged to the

Particular Qty. (Transportation

given separately)

1. The person or the firm submitting the tender should see that the rates of above

schedule are filled up by the Executive Engineer or in charge of the work before

issuing the tender.

2. The contractor should have to make his own arrangement for loading,

unloading and carting the materials from store to site of work at his own

unloading and carting the materials from store to site of work at his own cost.

3. The materials shall be issued free of cost by the Department. However, recovery

with be effected at the double rate of issue rate, in case of non return of balance

materials by the contract.

4. Approved vendor List for purchase of materials/Equipment required for the

work if Required.

5. All the surplus materials supplied by the deptt. As mentioned in schedule-A

should be handed over to the Department by the contractor at the Govt. stores as

6. The materials mentioned in schedule-A shall have to be checked for their

correctness and soundness by the contractor before taking the delivery of the

materials from the Government.

7. Necessary cement will be purchased by the agency at their own cost from open

market as per specification.

8. The persons of firm submitting the Tender should see that rates in the above

schedule are filled up by the Executive Engineer, on the issue of form prior to the

submission of the Tender.

Volume-III, PRICE BID VKV RWSS

9. Contractor should return the balance materials in good and acceptable condition,

otherwise recovery at the double rates will be affected in view of Clause 12.4.

Signature of contractor Executive Engineer

Public Health Works Division

Volume-III, PRICE BID VKV RWSS

SUMMARY (SCHEDULE-B)

Name of Work:- “Repairing of Inlet pipe and flooring C.C. work in ESR at Sardarpur, Fudeda

and Hirpura Headworks Under M & R of Vijapur RWSS”

Sr. No. Name of Work Amount Rs.

I / We am / are willing to carry out the work at______________________________% above / Below

percent (should be written in figure and words) of the estimated rates mentioned above amount of my /

our tender works out as under.

Estimated amount put to tender : Estimated amount put to Tender

Deduct________% Below Add________% above

Signature of contractor Executive Engineer

Public Health Works Division

Volume-III, PRICE BID VKV RWSS

ITEM DESCRIPTION Qty. Unit Rate Amount

1 Demolition and disposal of unserviceable materials with

all lead and lift.(i) Lime concrete.

2 Filling in foundation and plinth with murrum or selected

soil in layers of 20 cm thickness including watering 335.78 Cum 267.08

ramming and consoliating etc. complete.

3 Providing and laying cement concrete1:5:10 (1

Cement : 5 coarse sand : 10 hand broken stone

aggregate 40mm nominal size) and curing complete 17.720 Cum 2456.02

excluding cost of form work in. (A) Foundation and

4 Providing and laying cement concrete 1:2:4 (1- Cement

: 2- Coarse sand : 4- graded stone aggregates 20 mm

nominal size) and curing complete excluding cost of 35.44 Cum 3551.61

formwork in (A) Foundation and Plinth

5 Providing and laying cement concrete flooring 1:2:4 (1-

cement : 2-coarse sand : 4-graded stone aggregate

20mm nominal size) laid in one layer and finished with

a floating coat of neat cement. (B) 50mm thick.

6 DI/D.F pipes for ESR/Reservoir

Providing and fixing flanged D.I.D.F./Class K-9 pipes

vertically for RCC, Reservoir incl. providing clamps at

every 3 mt incl. jointing materials such as nuts, bolts,

rubber packing, hydraulic tesing and necessary

scaffolding etc. complete.

Manufacture, Supply & Delivery of ductile Iron flange

socket spigot bends, tees, reducers or any other

specials as per BS-EN-545/1995 class-A series K12

suitable for use with DI pipes manufactured as per

IS:8329/1994 delivery of specials is to be made to

GWSSB store or site of works any where in Gujrat

including all taxes, loading, unloading, carting,

stacking, insuarance, inspection charges, octroi etc.

Socket & spigot type

8 Labour charges for repairing leakage in CI/DI pipeline

of following diameter at different places including

Volume-III, PRICE BID VKV RWSS

necessary excavation manually or by mechanise

excavation, removing of mud, dewatering, cleaning of

pipe, cutting of pipe, Jointing & repairng using CID

joints, rubber rings, nut bolts, hiring excavator,

Hydra/Crain, dewatering machine, fuel, operator etc

complete (including cost of jointing material but

excluding cost of pipe) if necessary & labours required

with providing material such couplers, solution etc.

comp. (incl. all material but Exclu. cost of pipe)

9 Removing of Existing Pipeline

Removing of existing pipeline incl. removal of specials,

valves jointing material including carting and stacking

of removed material from site of work to the department

store as directed excl. excavation and refilling

D.I./C.I. S & S Spun pipes suitable for tyton joints

9.1 250mm dia DI pipe 54.20 RMT 56.00

9 450mm dia DI pipe 29.40 RMT 126.00

10 Providing and fixing double scaffolding system (cup lock 656.26 Sq.Mt. 338.25

type) on the extenor side, up to seven story height made

with 40 mm dia M.S. tube 1.5 m centre to centre, horizontal

& vertical tubes joining with cup & lock system with M.S.

tubes, M.S. tube challies, M.S. clamps and M.S. staircase

system in the scaffolding for working platform etc. and

maintaining it in a serviceable condition for the required

duration as approved and removing it there after. The

scaffolding system shall be stiffened with bracings, runners,

connection with the building etc wherever required for

inspection of work at required locations with essential

safety features for the workmen etc. complete as per

directions and abproval of Engineer-in-charge. The

elevational area of the scaffolding shall be measured for

payment purpose. The payment will be made once

irrespective of duration of scaffolding. Note: - This item to

be used for maintenance work judicially, necessary

deduction for scaffolding in the existing item to be done.

11 L, L & J of DI/CI Pipe (Flanged Joint)

Providing and making flanged DI / CI pipes of all classes /

specials etc. including cost of all jointing materials rubber

packing, nut bolts, including lowering, laying jointing labour

hydraulic testing etc. complete.

11.1 250mm dia DI Pipe 54.20 RMT 1007.00

11.2 450mm dia DI Pipe

12 Providing & Fixing 50 C.M. wide M.S. ladder fabricated from

M.S. falts 10 mm X 75 mm with 20 mm dia steel bar steps in

double rows @ 30C.M. C/C. with welding and anchoring

coats anticorosive paint.

Volume-III, PRICE BID VKV RWSS

13 Providing & Fixing M.S grills of required pattern to wooden

frames of windows etc. with M.S Flats at required spacings

and frame alround,square or round bars with round headed

bolts and nuts or by screws (B) Ornamental Grill

14 Providing, installing & commissioning Flash mixer impeller

with motor, gear arrangement & electrical cable, 2.00 EACH 77371.00

connections, control panels etc.(size as per design)

Rupees Fourteen Lac Two Thousand Three Hundred Eighty Five & Paise Thirty Nine

I / We am / are willing to carry out the work at______________________________% above

/ Below percent (should be written in figure and words) of the estimated rates mentioned

above amount of my / our tender works out as under.

Estimated amount put to tender: Estimated amount put to Tender

Deduct________% Below Add________% above

Executive Engineer

SIGNATURE OF CONTRACTOR Public Health Works Division

Volume-III, PRICE BID VKV RWSS

ITEM NO. 1 Demolition and disposal of unserviceable materials with all lead and lift.(i)

1. The Dismantling of cement concrete/Lime Concret foundation or the

concrete worse shall be done as per instruction of Engineer incharge.

2. The Dismantling work shall be done properly as per site condition & without

Damage to other civil work.

3. The carting disposing of the dismantle material should be done by contractor

as per instruction.

4. During performing above operation any damage occur to any useful property

than its repairing cost will have to born by contractor .

5. Payment will be done on Cmt. Basis.

ITEM NO. 2 Filling in foundation and plinth with murrum or selected soil in layers of

cm thickness including watering ramming and consoliating etc. complete.

1.0. Workmanship:

1.1. The earth to be used for. filling shall be free from salts, organic or other foreign

matter. All clods of earth shall be broken.

1.2. As soon as the work in foundation has been completed and measured, the site of

foundation shall be cleared of all debris, brick bats, mortar dropping etc; and

filled with earth in layers not exceeding 20 Cms. Each layer shall be adequately

watered, rammed and consolidated before the succeeding layer is laid. The earth

shall be rammed with iron rammers where feasible and with the butt ends of

crow-bars, where rammer cannot be used.

1.3. The plinth shall be similarly filled with earth in layers not exceeding 20 Cms.

adequately watered and consolidated bramming with iron or wooden rammers.

When filling reaches finished level, the surface shall be flooded with water

for atleast 24 hours and allowed to dry and then rammed and consolidated.

1.4. The finished level of filling shall be kept to shape intended to be given to floor.

1.5. In case of large heavy duty flooring like factory flooring, the consolidation

may be done by power rollers, where so specified. The extent of

consolidation required shall also be as specified.

1.6. The excavated stuff of the selected type shall be allowed to be used in

filling the trenches and plinth. Under no circumstances black cotton soil be

used for filling the plinth.

2.0. Mode of Measurement and Payment:

2.1. The payment shall be made for filling in foundation and plinth. No deduction shall be

made for shrinkage or voids, if consolidated as instructed above.

Volume-III, PRICE BID VKV RWSS

2.2. Mode Of Payment:- The rate-shall be for a unit of one Cubic Metre as per Price Bid.

ITEM NO. 3 Providing and laying cement concrete1:5:10 (1 Cement : 5 coarse sand :

hand broken stone aggregate 40mm nominal size) and curing complete

excluding cost of form work in. (A) Foundation and plinth

1.0. Materials:

1.1. Water shall conform to M-l. Cement shall conform to M-3. Sand shall conform to M-6.

Stone aggregate 40 mm. nominal size shall conform to M-12.

2.0. Workmanship:

2.1.1. Before starting concrete bed of foundation treaches shall be cleared of all

loose materials, levelled, watered and rammed as directed.

2.2. Proportion of Mix :

2.2.1. The Proportion of cement, sand and coarse aggregate shall be one part of cement,

parts of sand, 8 parts of stone aggregates and shall so measured by volume.

2.3.1. The concrete shall be mixed in a mechanical mixer at the site of work. Hand

mixing may however be lowed for smaller quantity of work if approved by the

Engineer-in-charge. When hand mixing is permitted by the Engineer-in-charge in

case of break-down of machineries and in the interest of the work, it shall be

carried out on a water tight platform and care shall be taken to ensure that

mixing is continued until the mass is uniform in colour and consistency. However

such cases 10% more cement than otherwise required shall have to be

used without any extra cost. The mixing in mechanical mixer shall be

done for a period 1 to 2 minutes. The quantity of water shall be

sufficient to produce a dense concrete of required workability for the

2.4. Transporting & Placing the concrete :

2.4.1. The concrete shall be handled from the place of mixing to the final position in not

more than 15 minutes by the method s directed and shall be placed into its

final position, compacted and finished within 30 minutes of mixing with

water i.e. before the setting commences.

2.4.2. The concrete shall be laid in layers of 15 cms. to 20 cms.

2.5. Compacting:

2.5.1. The concrete shall be rammed with heavy iron rammers and rapidly to get the

required compaction and allow all the interestices to be filled with mortar.

Volume-III, PRICE BID VKV RWSS

2.6.1. After the final set, the concrete shall be kept continuosly wet, if required by ponding

for a period of not less than 7 days from the dale of placement.

3.0. Mode of Measurement and Payment:

3.1. The concrete shall be measured for its length, breadth and depth, limiting

dimensions to those specified on plans or directed.

3.2. Mode Of Payment:- The rate-shall be for a unit of one Cubic Metre as per Price Bid.

ITEM NO. 4 Providing and laying cement concrete 1:2:4 (1- Cement : 2- Coarse sand : 4-

graded stone aggregates 20 mm nominal size) and curing complete

excluding cost of formwork in (A) Foundation and Plinth

1.0. Materials : Water shall conform to M-l. Cement shall conform to M-3. Sand shall

conform to M-6. Grit shall conform to M-8. Graded stone aggregate 20 mm.

nominal size shall conform to M-12.

2.1. The concrete mix is not required to be designed by preliminary tests. The proportion of

the concrete mix shall be 1 : 2 : 4 (1 cement: 2 coarse sand ; 4 graded stone

aggregate 10 mm. nominal size) by volume. Concrete work shall have exposed

concrete surface or as specified in the item.

2.2. The designation ordinary M-100, M-150, M-200, M-250 specified as per. I.S.

Corresponding approximately to 1 : 3 : 6, 1 : 2 : 4, 1 : 1 1/2 : 3 and 1:1:2 nominal

mix of ordinary concrete by volume respectively.

2.3. The ingredients required for ordinary concrete containing one beg of cement of

50 Kg. by weight (0.0342 Cu. M.) for different proportions of mix shall be as

Total quantity of dry

aggregate by volume per

Grade of Kgs. of cement to be Proportion of fine

concr taken as the sum of aggregate to coarse

ete individual volume of fine aggregate

and coarse aggregates,

M-100 (1 : 3: 6) 300 Liters Generally 1 : 2 for fine 34 Liters

aggregate to coarse

M-150 (1 : 2 : 4) 2.20 Liters aggregate by volume 32 Liters

but subject to and upper

M-200 (1 :1 1/2 160 Liters limit of 1 : 1 1/2 and

Volume-III, PRICE BID VKV RWSS

:3) lower limit 1 :

M-250 ( 1:1:2) 100 Liters 27 Liters

2.4. The water cement ratios shall not more than those specified in the above table.

The cement content of the mix specified in the Table shall be increased if the

quantity of water in a mix has to be increased to overcome the difficulties of

placement and compaction so that the water-cement-ratio specified in the Table

is not exceeded.

2.5. Workability of the concrete shall be controlled by maintaining a water-cement-ratio

that is bound to give a concrete mix which is just sufficiently wet to be placed

and compacted without difficulty with the means available.

2.6. The maximum size of coarse aggregate shall be as large as possible within the limits

specified but in no case greater than one fourth of the minimum thickness of

the member, provided that the concrete can be placed without difficulty

so as to surround all reinforcement thoroughly and to fill the comers of the

2.7. For reinforced concrete work, coarse aggregates having a nominal size of 20 mm. are

generally considered satisfactory.

2.8. For heavily reinforced concrete members as in the case of ribs of main beams,

the nominal maximum size of coarse aggregate should usually be restricted to

5 mm. less than the minimum, clear distance between the main bars, or 5 mm.

less than the minimum cover to the reinforcement whichever is smaller.

2.9. Where the reinforcement is widely spaced as in solid slabs, limitations of size of the

aggregate may not be important and the nominal maximum size may sometimes

be as great as OF greater than the minimum cover.

2.10. Admixture may be used in concrete only with approval of Engineer-in-charge

based upon the evidence that with the passage of time, neither the

compressive strength of concrete is reduced nor are other requisite qualities of

concrete and steel impaired by the use of such admixtures.

3.0. Workmanship:

3.1. Proportioning : Proportioning shall be done by volume, except cement which shall be

measured in terms of bags of 50 Kg. weight. The volume of one such bag being

taken as 0.0342 Cu. metre. Boxes of suitable sizes shall be used for measuring

sand aggregate. The size of the boxes (internal) shall be 35 cms. x 25 cms. and

40 Cms. deep. While measuring the aggregate and sand, the box shall be filled

without shaking ramming or hammering. The proportioning of sand shall be on

the basis of its dry volume and in case of damp sand, allowances for bulkage shall

Volume-III, PRICE BID VKV RWSS

3.2.1. For all work, concrete shall “be mixed in a mechanical mixer which alongwith other

aecessories shall be kept in first class working condition and so maintained

throughout the construction. Measured quantity of aggregate, sand, cement

required for each batch shall be poured into the drum of the mechanical mixer

while it is continuously running. After about half a minute of dry mixing,

measured quantity of water required for each batch of concrete mix shall be

added gradually and mixing continued for another one and a half minute. Mixing

shall be. continued till materials are uniformly distributed and uniform colour of

the entire mass is obtained and each individual particle of the coarse aggregate

shows complete coating of mortar containing its proportionate amount of

cement. In no case shall the mixing be done for less than 2 minutes after all

ingredients have been put into the mixer.

3.2.2. When hand mixing is permitted by the Engineer-in-charge for small jobs or for certain

other reasons, it shall be done on the smooth watertight platform large

enough to allow efficient turning over the ingredients of concrete before

and after adding water. Mixing platform shall be so arranged that no

foreign material gets mixed with concrete nor does the mixing water flow

out. Cement in required number of bags shall be placed in a uniform layer on top

of the measured quantity of fine and coarse aggregate, which shall also be

spread in a layer of uniform thickness on the mixing platform. Dry coarse and

fine aggregate arid cement shall then be mixed thoroughly by turning over to get

a mixture to uniform colour. Specified quantity of water shall then be added

gradually through a rose-can and the mass turned over till a mix of

required consistency is obtained. In hand mixing, quantity of cement shall be

increased by 10 percent above that specified.

3.2.3. Mixers which have been out of use for more than 30 minutes shall be throughly

cleaned before putting in a new batch. Unless otherwise agreed to by the

Engineer-in-charge the first batch of concrete from the mixture shall

contain only two thirds of normal quantity of coarse aggregate. Mixing

plant shall be thoroughly cleaned before changing from one type of

cement to another.

3.3. Consistency: 3.3.1. The degree of consistency which shall depend upon the nature of

the work and methods of vibration of concrete, shall be determined by regular

slump tests in accordance with I.S. 1199-1959. The slump of 10 mm. to 25 mm.

shall be-adopted when vibrators are used and 80 mm. when vibrators are not

4.4. Inspection:

3.4.1. Contractor shall give the Engineer-in-charge due notice before placing any

concrete in the forms to permit him to inspect and accept the false work

and forms as to their strength, alignment, and general fitness but such inspection

shall not relieve the contractor of his responsibility for the safety of men,

machinery, materials and for results obtained. Immediately before concreting,

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all forms shall be thoroughly cleaned.

3.4.2. Centering design and its erection shall be got approved from the Engineer-in-charge.

One carpenter with helper shall invariably be kept present throughout the

period of concreting. Movement of labour and other persons shall be

totally prohibited for reinforcement laid in position. For access to different

parts, suitable mobile platforms shall be provided so that steel reinforcement in

position is not disturbed. For ensuring proper cover, mortar blocks of suitable

size shim be cast and tied to the reinforcement. Timber, kapachi or metal pieces

shall not be used for this purpose.

3.5. Transporting and laying:

3.5.1. The method of transporting and placing concrete shall be as approved. Concrete shall

be so transported and placed that no contemination segregation or loss of its

constituent material takes place. All form work shall be cleaned and made free

from standing water, dust, show or ice immediately before placing of concrete.

No concrete shall he, placed in any part of the structure untill the approval of

the Engineer-in-charge has been obtained.

3.5.2. Concreting shall proceed continuously over the area between construction

joints. Fresh concrete shall not be placed against concrete which has been in

position for more than 30 minutes unless a proper construction joint is formed.

Concrete shall be compacted in its final position within 30 minutes of its

discharge from the mixer. Except where otherwise agreed to by the Engineer-in-

charge concrete shall be deposited in horizontal layers to a compacted depth of

not more than 0.45 metre when internal vibrators are used and not exceeding

0.30 metre in all other cases.

3.5.3. Unless otherwise agreed to by the Engineer-in-charge, concrete shall not be dropped

into place from a height exceeding 2 metres. When truoking or chutes arc used

they shall be kept close and used in such a way as to avoid segregation. When

concreting has to be resumed on a surface which has hardened, it shall

be roughened, swept clean, thoroughly wetted and covered with a 13 mm.

thick layer of mortar composed of cement and sand in the same ratio as in the

concrete mix itself. This 13 mm. layer of mortar shall be freshly mixed and

placed immediately before placing of new concrete. Where concrete has not

fully hardened, all laitance shall be removed by scrubbing the wet surface with

wire or bristle brushes, care being taken to avoid dislodgernent of any

panicles of coarse aggregate. The surface shall then be thoroughly wetted,

all free water removed and then coated with neat cement grout. The first layer

of concrete to be placed on this surface shall not exceed 150 mm. in thickness

and shall be well rammed against old work, particular attention being given to

corners and close spots.

3.5.4. All concrete shall be compacted to produce a dense homogeneous mass with

the assistance of vibrators unless, otherwise permitted by the Engineer-in-

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charge for exceptional cases, such as concreting under water, where vibrators

cannot be used. Sufficient vibrators in serviceable condition shall be kept at site

so that spare equipment is always available in the event of breakdowns.

Concrete shall be judged to be compacted when the mortar fills the spaces

between the coarse aggregate and begins to cream

up to form an even surface. Compaction shall be completed before the initial setting starts

i.e. within 30 minutes of addition of wafer to dry mixture. During compaction, it

shall be observed that needle vibrators are not applied on reinforcement which is

likely to destroy the bond between concrete and reinforcement.

3.6. Curing: Immediately after compaction, concrete shall be protected from weather,

including rain, running water, shocks, vibration, traffic, rapid temperature

changes, frost and drying out process. It shall be covered with wet

sacking, hassain or other similar absorbant material approved, soon after the

initial set and shall be kept continuously wet for a period of not less than 14 days

from the date of placement. Masonary work over foundation concrete may be

started after 48 hours of its laying but curing of concrete shall be continued for a

minimum period of 14 days.

3.7. Sampling and Testing of concrete :

3.7.1. Samples from fresh concrete shall be taken as per I.S. 1199-1959 and cubes shall be

made, cured and tested at 7 days or 28 days as per requirements in accordance

with I.S. 516-1959. A random sampling procedure shall be adopted to ensure that

each concrete batch shall have a resonable chance of being tested i.e. the

sampling should be spread over the entire period of concreting and cover all

mixing units. The minimum frequency of sampling of concrete of each

grade shall be in accordance with following :

Quantity of concrete Quantity of concrete in

No. of samples No. of samples

in the work the works

51 and above 4 + one additional for each additional 50 M. or part thereof.

NOTE : At least one sample shall be taken from each shift. Ten test specimens

shall be made from each sample, five for testing at 7 days and the remaining

five at 28 days. The samples of concrete shall be taken on each day of the

concreting as per above frequency. The number of specimens may be

suitably increased as deemed necessary by the Engineer-in-charge when

procedure of tests given above reveals a poor quality of concrete and in other

3.7.2. Tire average strength of the group of cubes cast for each day shall not be less than

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the specified cube strength of 150 Kg/Cm at 28 days. 20% of the cubes cast for

each day may have value less than the specified strength provided the lowest

value is not less than 85% of the specified strength. If the concrete made

in accordance with the proportions given for a particular grade docs not

yield the specified strength, such concrete shall be classified as belonging to the

appropriate lower, grade concrete made in accordance with the proportions

given for a particular grade shall not, however, be placed in a higher grade on

the ground that the test strength are higher than the minimum specified.

3.8. Stripping:

3.8.1. The Engineer-in charge shall be informed in advance by the contractor of his intention

lo strike the form work. While fixing the time for removal of form work, due

consideration shall be given to local conditions, character of the structure, the

weather and other condition that influence the setting of concrete and pf the

materials used in the mix. In normal circumstances (generally where

temperatures are above 20 ° C) and where ordinary concrete is used,

forms may be struck after expiry of periods specified item of form work.

3.8.2. All form work shall be removed without causing any shock or vibration as would

damage the concrete. Before the soffit and struts are removed, the concrete

surface shall be exposed, where necessary in order to ascertain that the

concrete has sufficiently hardened. Centring shall be gradually and

uniformly lowered in such manner as to permit the concrete to take

stresses due to its own weight uniformly and gradually. Where internal metal ties

are permitted, they or their removable parts shall be extracted without

causing any damage to the, concrete and remaining holes filled with

mortar. No permanently embeded metal part shall have less than 25 mm. cover

to the finished concrete surface. Where it is intended to re-use the form work,

it shall be cleaned and made good to the satisfaction of the Engineer-in-

charge. After removal of form work and shuttering, the Executive Engineer

shall inspect the work and satisfy by random checks that concrete

produced is of good quality.

3.8.3. Immediately after the removal of forms, all exposed bolts etc., passing through the

cement concrete member and used for shuttering or any other purpose shall be

cut inside the cement concrete member to a depth of at least 25 mm. below

the surface of the concrete and the resulting holes be filled by cement mortar.

All fine caused by form joints, all cavities produced by the removal of form ties

and all other holes and depressions honeycomb spots, broken edges or corners

and other defects shall be thoroughly cleaned, saturated with water and

carefully pointed and rendered true with mortar of cement and fine

aggregate mixed in the proportions used in the grade of concrete that is-being

finished and of as dry consistency as is possible to use. Considerable pressure

shall be applied in filling and pointing to ensure thorough Riling in all voids.

Surfaces which are pointed shall be kept moist for a period of 24 hours. If rock

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pockets/honeycombs in the opinion of the Engineer in- charge are of such an

extent or character to effect the strength of the structure materially or to

endanger the, life of the steel reinforcement, he may declare the

concrete defective and require the removal and replacement of the portions of

the structure affected.

4.0. Mode of Measurement and Payment:

4.1. The consolidated cubical contents of concrete work as specified in item shall be

measured. The concrete laid in excess of section shown on drawings or as

directed shall not be measured. No deduction shall be made for (a) Ends of dis-

similar materials such as joits, beams, posts, girders, rafters, purline trusses,

corbels and steps etc upt 500 Sq. Cm. in section. (b) Opening upto 0.1 Sq. M.

4.2. The rate includes cost of all materials, labour, tools and plant required for

mixing, placing, position, vibrating and compacting, finishing, as directed,

curing and all other incidental expenses for producing concrete lied

strength The rate excludes the cost of form work.

4.3. Mode Of Payment:- The rate-shall be for a unit of one Cubic Metre as per Price Bid.

ITEM NO. 5 Providing and laying cement concrete flooring 1:2:4 (1-cement : 2-coarse

sand : 4-graded stone aggregate 20mm nominal size) laid in one layer and

finished with a floating coat of neat cement. (B) 50mm thick.

1. Cement: Ordinary Portland Cement (OPC) of approved make conforming to relevant IS

specifications.

2. Fine Aggregate: Clean, coarse sand conforming to IS standards, free from silt, clay,

and organic impurities.

3. Coarse Aggregate: Hard, durable, graded stone aggregate of 20 mm nominal size

conforming to IS specifications.

4. Water: Clean and potable, free from harmful salts and organic matter.

Preparation of Surface

1. The base surface shall be cleaned of dust, dirt, loose materials, oil, grease, and other

foreign matter.

2. The surface shall be properly wetted before laying concrete.

3. Levels and slopes shall be marked and checked before commencement of work.

Laying of Concrete

1. Concrete shall be machine mixed in the proportion of 1:2:4.

2. The concrete shall be laid in panels of approved size and thickness of 50 mm.

3. It shall be compacted thoroughly by tamping and finished to the required line, level, and

4. Construction joints shall be provided where directed.

1. The surface shall be finished with a floating coat of neat cement while the concrete is

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2. The flooring shall be smooth, even, and free from undulations, cracks, honeycombing,

and surface defects.

3. Necessary grooves or panel joints shall be formed as per drawings or instructions.

1. The finished floor shall be protected from damage and rapid drying.

2. Curing shall be carried out continuously for a minimum period of 14 days.

1. Measurement shall be made in square metres (m²) of finished flooring.

2. The thickness shall be 50 mm as specified.

The rate shall include the cost of all materials, labour, mixing, laying, compacting, finishing with

neat cement floating coat, curing, tools and plants, and all incidental charges

necessary to complete the work as per specifications.

ITEM NO. 6 DI/D.F pipes for ESR/Reservoir

Providing and fixing flanged D.I.D.F./Class K-9 pipes vertically for RCC,

Reservoir incl. providing clamps at every 3 mt incl. jointing materials such as

nuts, bolts, rubber packing, hydraulic tesing and necessary scaffolding etc.

6.1 80 to 300mm dia

6.2 350 & above

Supply and Delivery of Ductile Iron Pipe as per IS:8329-2000 or its latest

revision or amendments if any including jointing material as EPDM ring as per

IS 5382-1985 and ISO: 4633-1996 or its latest revision or amendments if any

The following standards, specifications and codes are part of this specification.

In all cases, the latest revision of the including all applicable official

amendments and revisions shall be referred to. In case of discrepancy

between this specification and those referred to herein, this specification

 ISO: 10803-1997 Design method for ductile iron pipes

 IS:8329-2000 Centrifugally Cast (spun) ductile iron pressure pipes for

water, gas and sewage

 ISO:2531-1991 Ductile iron pipes, fittings and accessories for pressure

 ISO:4179-1985 Ductile iron pipes for pressure and non pressure-

 cement mortar lining - General requirements.

 IS:8112 Specification for 43 Grade ordinary Portland cement.

 BS:3416 Bitumen based coatings for cold application, suitable for use in

contact with potable water.

 ISO:8179-1995 Ductile iron pipes-External coating-Part-1 Metallic

Zinc with finishing layer.

 IS:638 Sheet rubber jointing and rubber insertion jointing.

 ISO:4633-1996 Rubber seals-Joint rings.

 IS:5382-1985 Specification for Rubber sealing rings for gas mains, water

mainsand sewers.

 AWWA C600 Installation of ductile iron water mains and their

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1.0 Internal Diameter:

The nominal values of the internal diameters of pipe, expressed in

millimeters are approximately equal to the number indicating their

nominal sizes DN.

The working length of pipes shall be 3.0 metres.

The wall thickness of pipe 'e' in mm shall be calculated as a function of

the nominal diameter by the following equation with minimum of 5 mm

where : e = wall thickness in mm, DN = the nominal diameter, K = the

whole number coefficient

4.0 EPDM Rubber Gasket:

Rubber Gasket shall be suitably for Push-on-Joint.

The spigot ends shall be suitably chamfered or rounded off to facilitate

smooth entry of pipe in the socket fitted with the rubber gasket Rubber

Gasket shall confirm to IS 5382-1985 and ISO : 4633-1996 its latest

revision or amendments if any

5.0 Sampling Criteria:

Sampling criteria for various tests, unless specified in IS 8329-2000, shall

be as laid down in IS 11606. Mechanical test, Brinell Hardness test,

Hydrostatic test etc are shall be as per IS 8329-2000

6.0 Tolerances on External Diameter:

The nominal external diameter (DE) of the spigot end of socket and spigot pipes

and when measured circumferentially using a diameter tape shall confirm to

the requirements specified as follow. The positive tolerance is +1 mm and

applies to all thickness classes of pipes. The maximum negative tolerance of

the external diameter are specified as follow:

DN Nominal Toleranc

7.0 Tolerance on Ovality:

Pipes shall be as far as possible circular internally and externally. The

tolerance for out-or- roundness of the socket and spigot ends is given

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Nominal Diameter Allowable Difference Between

in mm Minor Axis and DE in mm

8.0 Tolerance in thickness

The tolerance on wall thickness (e) and the flange thickness (b) of the

pipes shall be as below:

Dimensions Tolerance in mm

Wal thickness (e) - (1.3 + 0.001 DN )1)

Flange thickness (b) + (2+0.05b) & - (2+0.05b)

Pipe shall be delivered internally and externally coated.

External Coating: Pipe shall be metallic zinc coated and after that it

be given a finishing layer of bituminous paint as per IS - 8329-2000 Zinc

coating shall comply with IS:8329/EN 545/ ISO 8179. Only molten zinc

spray coating shall be acceptable. The average mass of sprayed metal

shall not be less than 130 g/sqm with a local minimum of

Bitumen overcoat shall be of normal thickness of 70 microns unless

otherwise specified. It shall be a cold applied compound complying

with the requirements of BS 3416 Type II suitable for tropical climates

factory applied preferably through an automatic process. Damaged

areas of coating shal be repainted on site after removing any remaining

loose coating and wire brushing any rusted areas of pipe.

Internal lining: Internaly pipe shal be Portland Cement mortar lined (as

per IS - 8329-2000). The mortar shal contain by mass at least one part

of cement to 3.5 part of sand. All pipes and fittings shall be internally

lined with cement mortar using high speed centrifugal process in

accordance with IWO 4179/IS 8329. Cement mortar lining shall be

applied at the pipe manufacturing shop in conformity with the

aforesaid standards. No admixtures n the mortar shall be used without

the approval of the Engineer. The sand to cement proportion of sand if

justified by the sieve analysis.

Pipe lining shall be inspected on site and any damage or defective areas

shall be made good to the satisfaction of the Engineer.

Lining shall be uniform in thickness all along the pipe. The minimum

thickness of factory applied cement mortar lining shall be as per IS:

8329 Annex-B or ISO 4179. This is given below.

Nominal Pipe Size (mm) Nominal lining thickness

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Jointing of DI pipes and fittings shall be push-on type

The Contractor shall source the push-on-joint gaskets only from the pipe

manufactures. In turn the pipe manufacturer shall supply at least 10%

additional quantity of gaskets over and above the requirement to the

Contractor at no extra cost.

The gasket used for joints shall be suitable for natural and purified water

conveyance. In jointing DI pipes and fittings, the Contractor shall take

into account the manufacturer’s recommendations as to the methods and

equipments to be used in assembling the joints. In particular the

Contractor shall ensure that the spigot end of the pipe to be jointed is

smooth and has been properly chamfered, so that once the rubber ring is

correctly positioned before the joint is made, does not get damaged by

friction or sharp edges of

the spigot Chamfer. The rubber rings and the recommend lubricant shall

be obtained only through the pipe manufacturer.

Rubber ring bundles form every lot shall carry with them manufacturers

test certificate for the following mechanical properties.

2. Tensile strength

3. Compression set

4. Accelerated again test

5. Water absorption test

6. Stress relaxation test

Rubber rings shall be clearly labeled in bundles to indicate the type of ring,

the type of joint, the size of the pipe with which they are to be used, the

manufacturer’s name and trade mark, the month and year of

manufacture and the shelf life.

11.0 Testing of Pipe:

The main test among others to be conducted shall be as per IS:8329-2000 or

with its latest revision/amendments.

[a] Mechanical Tests

Mechanical tests shall be carried out during manufacture of pipes as

specified in the Standards. The frequency and sampling of tests for each

batch of pipes shall be in accordance with IS 11606-1986. The test results

so obtained for all the pipes and fittings of different sizes shall be

submitted to Engineer. The method for tensile tests and the minimum

tensile strength requirement for pipes and fittings shall be as per

IS;8329/EN 545 for pipes and IS:9523/EN 545 for fittings.

[b] Brinell Hardness Test

For checking the Brinell hardness the test shall be carried out on the test

ring or bars cut from the pipes used for the ring test and tensile test in

accordance with IS:1500. The test shall comply with the requirements

specified in IS:1500/ISO

If any test piece representing a lot fails in the first instance, two additional

tests shall be made on test pieces selected from two other pipes from the

same lot. If both the test results satisfy the specified requirements the lot

shall be accepted. Should either of these additional test pieces fall to pass

the test, the lot shall be liable for rejection.

[d] For hydrostatic test

At works, the pipes and fittings shall be kept under test pressure as specified

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in the standard for a period of minimum 15 seconds during which the pipes

shall be struck moderately with a 700 g hammer for confirmation of

satisfactory sound. They shall withstand the pressure test without showing

any leakage, sweating or other defect of any kind. The hydrostatic test

shall be conducted before surface coating and lining.

12.0 Quality Assurance

The manufacturer shall have a laid down Quality Assurance Plan for the

manufacture of the products offered which shall be submitted along

with the tenders.

The methods of marking all the pipes to be delivered under scope of contract

shall ensure that all the information will remain legible even after

transportation, storage in open space etc. In general the legible and indelible

marking upon the goods shall indicate the followings;

i) Certification mark on each pipe.

ii) Manufacturers brand name and/or trademark.

iii) Purchasers mark as “GWSSB” be inscribed.

iv) The outside diameter and pressure rating.

v) Batch number or lot number.

vi) Inspector’s mark on each pipe

Payment as per RMT basis.

 The pipes & joints shall be procured, supplied by the Contractor at work site at his

own cost. Every care shall be taken in carting them to site. During transportation any

damage shall be occurring to pipes for fittings the replacement of pipes given by the

contractor at his own cost.

 The contractor shall make his own arrangement for obtaining permission for storing &

stacking of pipes etc. from land boards whether they are Government, Municipal Local

Bodies or Private land owner.

 Every pipes before lowering shall be got checked and thoroughly cleaned and leveled

as required on the line, without any claim for extra cost whether it is required. The

pipe shall be carefully lowered into the vertical line with the help of a suitable type

of chain pulley blocks, which shall first be approved by the Engineer-in-Charge. Each

pipe shall be properly jacked. No jointing operation shall be started unless the

gradients levels are approved by the Engineer-in-Charge or his representatives.

 The pipes shall be laid complete in centerline ranged accurately by means of a string

attached to both marked center of site rails and no deviation shall be permissible

without the permission of Engineer-in-Charge.

 The pipes shall be brushed before lowering any laying or remove any soil or dirt etc.

that may have accumulated.

 The space shall be filled with the joint.

 TESTING OF WATER PIPES:

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 30m whichever is less without showing any leakage or sweating anywhere in the pipes

joints specials valves etc. it any defect are found the contractor shall be made good

the same at his own cost.

 Any leaking joints shall be made good and above test pressure in to be lowered

gradually after satisfactory test is & over.

 GWSSB will not be able to provide water for testing of the pipelines & water

containers of the project. This shall have to be managed by the contractor at his costs

 The hydraulic test shall be given again if considered necessary by the Engineer or his

representative to show that no further leakages or sweating is there. The contractor

shall have to make necessary arrangements for water testing as well as plugging the

opening of pipes etc. as directed without claiming any extra cost. The pipelines shall

be kept filled with water for a work lines shall be kept filled with water for a week or

till it is situated for testing is done.

 If the pipe lines are laid in detached sanctioned & not in continuous length due to any

reasons such as non-availability of specials or due to obstacle etc. The contractor shall

see that no end of pipes length is kept open-ends are immediately covered up either

by suitable blank flange or cap slug or by means of double layer gunny bags clothes

tied properly by mild steel wire without any claim for extra-cost.

 The rate shall be per meter of pipe line laid including all specials and fitting jointly

etc. Cutting and waste shall not be paid separately. The length shall be measured not

on the straight line and curves along the center line over the pipe and specials correct

 Payment shall be as per payment schedule

ITEM NO. 7 DI Specials

Manufacture, Supply & Delivery of ductile Iron flange socket spigot bends,

tees, reducers or any other specials as per BS-EN-545/1995 class-A series

K12 suitable for use with DI pipes manufactured as per IS:8329/1994 delivery

of specials is to be made to GWSSB store or site of works any where in

Gujrat including all taxes, loading, unloading, carting, stacking, insuarance,

inspection charges, octroi etc. complete.

Socket & Spigot Type

7.1 80 to 300mm dia

7.2 350 & above

A) Manufacture, supply and delivery of Ductile Iron Flange Socket spigot bends,

tees, reducers or any other specials as per BS-EN-545 / 1995 class-A series K-12

suitable for use with DI pipes manufactured as per IS 8329/1994 delivery of

specials is to be made to site of works including all taxes, loading, unloading,

carting, stacking, insurance, inspection charges, Octroi etc. complete with

internal cement mortar lining with EPDM rubber gaskets.

B) Manufacture, supply and delivery of flanges, Tee, bends, tail piece, reducers,

air valve raiser pipes or any other specials suitable for use with DI pipes and

delivery of specials is to be made to site of works anywhere in Gujarat including

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all taxes, loading, unloading, carting, stacking, insurance, inspection charges,

Octroi etc. complete.

C) Manufacture, supply and delivery of CID joints with Rubber Rings of Standard

quality or any other specials suitable for use with D.I. pipes and delivery of

specials is to be made to site of works anywhere in Gujarat including all taxes,

loading, unloading, carting, stacking, insurance, inspection charges, Octroi

D) DI Specials with all types of diameters suitable of K9 grade pipes with inner

cement mortal lining. The necessary DI Specials required during the lowering &

lying of Ductile Iron Pipe shall be supplied by the agency and shall be as per

standard specification.

E) It shall be of best quality as per requirement Rate shall be including loading,

unloading, carting, insurance and labour charge etc. complete.

F) The payment shall be made on kg. basis as per Payment schedule.

ITEM NO. 8 Labour charges for repairing leakage in CI/DI pipeline of following diameter

at different places including necessary excavation manually or by mechanise

excavation, removing of mud, dewatering, cleaning of pipe, cutting of pipe,

Jointing & repairng using CID joints, rubber rings, nut bolts, hiring excavator,

Hydra/Crain, dewatering machine, fuel, operator etc complete (including cost

of jointing material but excluding cost of pipe) if necessary & labours

required with providing material such couplers, solution etc. comp. (incl. all

material but Exclu. cost of pipe)

1. Identification and marking of leakage location.

2. Excavation around ESR pipeline manually or by mechanical means to expose the

damaged pipe section.

3. Removal of excavated earth, sludge and mud from work area.

4. Dewatering of excavation pit wherever required.

5. Cleaning of exposed pipe surface and fittings.

6. Cutting and removal of damaged pipe portion if necessary.

7. Repairing leakage by fixing approved CID/Dresser joints, repair clamps or couplers.

8. Providing and fixing rubber gaskets/rings, nuts, bolts, washers, jointing compounds and

other consumables.

9. Use of hydra/crane for lifting and handling heavy fittings wherever required.

10. Testing the repaired section under operating pressure to ensure leak-proof

11. Backfilling around the repaired portion with excavated earth in layers and proper

12. Restoration of the site to original condition.

Materials Included

 CID/Dresser joints.

 Repair clamps/couplers.

 Rubber rings/gaskets.

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 Nuts, bolts and washers.

 Jointing compound, lubricant and sealing materials.

 Consumables required for repair work.

Machinery and Equipment Included

 Excavator/JCB.

 Dewatering pump set.

 Tools and tackles.

 Fuel and operator charges.

The work shall be measured on Each Leakage Repaired for the specified pipeline

The rate shall include:

 Labour charges.

 Excavation and backfilling.

 Cleaning and cutting of pipe.

 Cost of CID joints, couplers, rubber rings, nuts, bolts and other jointing materials.

 Hiring charges of excavator, hydra/crane, dewatering equipment, fuel and operators.

 Testing and commissioning.

 All incidental charges required for satisfactory completion of the work.

ITEM NO. 9 Removing of Existing Pipeline

Removing of existing pipeline incl. removal of specials, valves jointing

material including carting and stacking of removed material from site of work

to the department store as directed excl. excavation and refilling

9.1 250mm dia DI pipe

9.2 450mm dia DI pipe

Materials and Components to be Removed

1. Existing DI pipeline.

2. DI specials such as bends, tees, reducers and collars.

3. Sluice valves, butterfly valves and other appurtenances.

4. Flanged joints, mechanical joints and push-on joints.

5. Nuts, bolts, washers, rubber gaskets and jointing materials.

Method of Execution

1. The pipeline shall be isolated and made free from water before dismantling.

2. Necessary safety precautions shall be taken during execution of work.

3. Existing joints shall be carefully dismantled without causing damage to reusable

4. Where required, pipe sections shall be cut using approved cutting tools.

5. Valves, specials and fittings shall be removed carefully and separated according to

6. Recovered materials shall be cleaned and handled properly to avoid further damage.

7. The dismantled pipes, valves, specials and accessories shall be loaded, transported

and unloaded at the departmental store or other designated location.

8. Materials shall be stacked neatly as directed by the Engineer-in-Charge.

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9. Any damage caused due to careless handling shall be made good by the contractor at

Machinery, Tools and Equipment

 Hydra/Crane or chain pulley block, if required.

 Gas cutter or mechanical cutting tools.

 Trucks/tractors for transportation.

 Tools and tackles necessary for dismantling and handling.

Measurement shall be made in running metres (RM) of pipeline removed for the specified

diameter. Specials, valves and fittings encountered within the removed length shall be deemed

included in the item rate unless otherwise specified.

The rate shall include:

 Dismantling and removal of DI pipeline.

 Removal of specials, valves and accessories.

 Cutting, disconnecting and handling.

 Loading, transportation, unloading and stacking at departmental store.

 Labour, tools, tackles, machinery, fuel and operator charges.

 All incidental charges required for completion of work.

ITEM NO. 10 Providing and fixing double scaffolding system (cup lock type) on the

extenor side, up to seven story height made with 40 mm dia M.S. tube 1.5 m

centre to centre, horizontal & vertical tubes joining with cup & lock system

with M.S. tubes, M.S. tube challies, M.S. clamps and M.S. staircase system in

the scaffolding for working platform etc. and maintaining it in a serviceable

condition for the required duration as approved and removing it there after.

The scaffolding system shall be stiffened with bracings, runners, connection

with the building etc wherever required for inspection of work at required

locations with essential safety features for the workmen etc. complete as per

directions and abproval of Engineer-in-charge. The elevational area of the

scaffolding shall be measured for payment purpose. The payment will be

made once irrespective of duration of scaffolding.

Note: - This item to be used for maintenance work judicially, necessary

deduction for scaffolding in the existing item to be done.

1. Cup Lock scaffolding system made of sound and serviceable M.S. tubes.

2. M.S. vertical standards and horizontal ledgers of 40 mm diameter or approved equivalent.

3. M.S. clamps, chhallies, couplers and locking devices.

4. M.S. staircase units for safe access to working levels.

5. Working platforms with steel planks or approved decking material.

6. Guard rails, toe boards and safety netting wherever required.

7. All fittings, accessories and consumables required for complete erection.

1. Erection of double scaffolding system on the exterior face of the structure up to seven-storey

2. Providing vertical standards at maximum 1.50 m centre-to-centre spacing.

3. Providing horizontal ledgers and transoms connected through cup-lock mechanism.

4. Providing adequate cross bracings, runners and ties to ensure rigidity and stability of the

5. Anchoring and connecting scaffolding to the structure wherever required.

Volume-III, PRICE BID VKV RWSS

6. Providing safe working platforms at required levels.

7. Providing M.S. staircase arrangement for access to all working levels.

8. Providing guard rails, toe boards and other safety measures as per safety regulations.

9. Maintaining the scaffolding in safe and serviceable condition throughout the period of use.

10. Dismantling and removing the scaffolding after completion of work and clearing the site.

Safety Requirements

1. The scaffolding shall conform to relevant safety standards and labour regulations.

2. Adequate bracing and tying arrangements shall be provided to prevent sway or collapse.

3. Guard rails and toe boards shall be provided on all working platforms.

4. Safe access through staircase systems shall be ensured at all levels.

5. Regular inspection and maintenance shall be carried out during the period of use.

6. All workmen shall use appropriate safety equipment while working on the scaffolding.

The scaffolding shall be measured in square metres (m²) of elevational area covered by the scaffolding.

Elevational Area = Length × Height of Scaffolding

No deduction shall be made for openings or intermediate gaps unless otherwise specified.

The rate shall include:

 Supply, erection, maintenance and dismantling of cup lock scaffolding.

 M.S. tubes, ledgers, transoms, clamps, chhallies and couplers.

 Staircase system, working platforms, guard rails and toe boards.

 Bracing, tying and anchoring arrangements.

 Labour, tools, tackles, lifting equipment and safety arrangements.

 Maintenance of scaffolding for the entire period of use.

 Removal of scaffolding and site clearance after completion of work.

The payment shall be made only once based on the measured elevational area, irrespective of the

duration for which the scaffolding remains erected.

ITEM NO. 11 L, L & J of DI/CI Pipe (Flanged Joint)

Providing and making flanged DI / CI pipes of all classes / specials etc.

including cost of all jointing materials rubber packing, nut bolts, including

lowering, laying jointing labour hydraulic testing etc. complete.

11.1 250mm dia DI pipe

11.2 450mm dia DI pipe

The pipes & joints shall be procured, supplied by the Contractor at work site at

his own cost. Every care shall be taken in carting them to site. During

transportation any damage shall be occurring to pipes for fittings the

replacement of pipes given by the contractor at his own cost.

The trenches shall be well leveled so that pipes are laid evenly among them. The

pipes shall be fixed within two rubber rings to be supplied by department at the

place shown in schedule A, if directed by the Engineer-in-charge or mentioned in

item of schedule B. The specification for titan joints i.e. Rubber Rings shall be as

per details specification material section.

The contractor shall make his own arrangement for obtaining permission for

storing & stacking of pipes etc. from land boards whether they are Government,

Municipal Local Bodies or Private land owner.

Volume-III, PRICE BID VKV RWSS

Every pipes before lowering into the trenches shall be got checked and

thoroughly cleaned and the beds of the trenches shall be properly graded and

leveled as required on the line, without any claim for extra cost whether it is

required. The pipe shall be carefully lowered into the trenches with the help of a

suitable type of chain pulley blocks, which shall first be approved by the

Engineer-in-Charge. Each pipe shall be properly jacked and the spigot perfectly

fixed into the socket. No jointing operation shall be started unless the gradients

levels are approved by the Engineer-in-Charge or his representatives.

The pipes shall be laid complete in centerline ranged accurately by means of a

string attached to both marked center of site rails and no deviation shall be

permissible without the permission of Engineer-in-Charge. The pipe shall be laid

in reasonably dry trenches and no circumstances on slushy bedding.

The pipes shall be brushed before lowering any laying or remove any soil or dirt

etc. that may have accumulated.

The inside socket and outside of the spigot-shall be carefully cleaned. The pipe

shall be lowered carefully with socket and toward and the flow of water or up till

or as directed and spigot and should be carefully inserted into the socket and the

space shall be filled with the joint.

TESTING OF WATER PIPES:

After each section of the pipeline has been completed it shall be tested for

water tightness before being covered. The contractor shall at his own cost fill up

water in pipe line and given necessary hydraulic test section by section and the

pipe line shall stand the pressure which shall stand the pressure which shall

exceed the working pressure by (a) 50% of the highest pressure in the section.

(b) 30m whichever is less without showing any leakage or sweating anywhere in

the pipes joints specials valves etc. it any defect are found the contractor shall

be made good the same at his own cost.

Any leaking joints shall be made good and above test pressure in to be lowered

gradually after satisfactory test is & over.

GWSSB will not be able to provide water for testing of the pipelines & water

containers of the project. This shall have to be managed by the contractor at his

costs and risk.

The hydraulic test shall be given again if considered necessary by the Executive

Engineer or his representative to show that no further leakages or sweating is

there. The contractor shall have to make necessary arrangements for water

testing as well as plugging the opening of pipes etc. as directed without claiming

any extra cost. The pipelines shall be kept filled with water for a work lines shall

be kept filled with water for a week or till it is situated for testing is done.

If the pipe lines are laid in detached sanctioned & not in continuous length due

to any reasons such as non-availability of specials or due to obstacle etc. The

contractor shall see that no end of pipes length is kept open-ends are

immediately covered up either by suitable blank flange or cap slug or by means

of double layer gunny bags clothes tied properly by mild steel wire without any

claim for extra-cost.

Volume-III, PRICE BID VKV RWSS

The rate shall be per meter of pipe line laid including all specials and fitting

jointly etc. Cutting and waste shall not be paid separately. The length shall be

measured not on the straight line and curves along the center line over the pipe

and specials correct up to 1 cm.

The payment shall be paid after completion of whole item as mentioned in price bid

on Running Meter basis.

ITEM NO. 12 Providing & Fixing 50 C.M. wide M.S. ladder fabricated from M.S. falts

mm X 75 mm with 20 mm dia steel bar steps in double rows @ 30C.M. C/C.

with welding and anchoring 3 coats anticorosive paint.

1. M.S. Flats – 10 mm × 75 mm for side members.

2. M.S. Round Bars – 20 mm diameter for ladder steps/rungs.

3. Anchor bolts, foundation bolts or approved fastening system.

4. Anti-corrosive metal primer and paint of approved quality.

5. Welding electrodes and other consumables.

1. The ladder shall be fabricated from M.S. flats of size 10 mm × 75 mm forming the side

2. Ladder rungs shall be made of 20 mm diameter M.S. round bars.

3. Rungs shall be welded in double rows at 300 mm centre-to-centre spacing.

4. All welds shall be continuous, sound and free from defects.

5. The finished ladder shall be straight, rigid and capable of safely supporting maintenance

Fixing and Anchoring

1. The ladder shall be fixed firmly to the structure using approved anchor bolts, holdfasts or

embedded plates.

2. Adequate stand-off distance from the wall shall be maintained for safe climbing.

3. Anchoring arrangements shall ensure stability and prevent vibration or displacement during use.

4. All fixing accessories required for complete installation shall be included in the item.

Surface Preparation and Painting

1. The fabricated ladder shall be thoroughly cleaned to remove rust, scale, oil and welding slag.

2. One coat of approved anti-corrosive metal primer shall be applied before painting.

3. Two additional coats of approved anti-corrosive paint shall be applied over the primer.

4. Total painting shall comprise three coats to provide durable corrosion protection.

1. Fabrication and erection shall conform to relevant IS specifications and good engineering

2. All sharp edges and burrs shall be removed.

3. The ladder shall be properly aligned and securely fixed in position.

Measurement shall be made in Running Metres (RM) of ladder installed and accepted.

The rate shall include:

 Supply of M.S. flats and M.S. round bars.

 Cutting, bending, welding and fabrication.

 Anchor bolts, fasteners and fixing arrangements.

 Surface preparation, primer and three coats of anti-corrosive paint.

 Labour, tools, tackles, lifting equipment and consumables.

Volume-III, PRICE BID VKV RWSS

 Transportation, erection and all incidental charges required for complete installation.

The item shall be complete in all respects and approved by the Engineer-in-Charge.

ITEM NO. 13 Providing & Fixing M.S grills of required pattern to wooden frames of

windows etc. with M.S Flats at required spacings and frame alround,square

or round bars with round headed bolts and nuts or by screws (B) Ornamental

1. Mild Steel flats of approved size and thickness.

2. Mild Steel square bars, round bars or ornamental sections as approved.

3. M.S. frame all around of suitable size.

4. Round-headed bolts, nuts, washers, screws and fixing accessories.

5. Approved metal primer and anti-corrosive paint.

6. Welding electrodes and consumables.

1. The grill shall be fabricated to the approved ornamental design, pattern and dimensions shown

in drawings or as directed by the Engineer-in-Charge.

2. M.S. flats, square bars and round bars shall be accurately cut, aligned and welded to form a

rigid assembly.

3. The outer frame shall be fabricated from suitable M.S. sections and securely connected to grill

4. All joints shall be properly welded, ground smooth and finished neatly.

5. The grill shall be free from twists, bends and fabrication defects.

1. The grill shall be fixed to wooden, steel, RCC or masonry frames/openings as specified.

2. Fixing shall be carried out using round-headed bolts, nuts, washers, screws, holdfasts or

approved anchoring arrangements.

3. The grill shall be installed plumb, level and firmly secured in position.

4. Necessary holes, inserts and fixing accessories shall be provided for complete installation.

Surface Preparation and Painting

1. All steel surfaces shall be cleaned of rust, scale, oil, dirt and welding slag.

2. One coat of approved metal primer shall be applied before erection or immediately after

3. Two coats of approved anti-corrosive/enamel paint shall be applied after fixing.

4. The finished surface shall be uniform and free from paint defects.

1. Fabrication and installation shall conform to relevant IS specifications and standard engineering

2. The grill shall be sufficiently rigid to withstand normal operational loads and environmental

3. All exposed edges and corners shall be smooth and properly finished.

Measurement shall be made in kg of the actual area of ornamental grill fixed in position, measured

overall including frame.

The rate shall include:

 Supply of all M.S. flats, square bars, round bars and frame sections.

 Cutting, bending, welding, drilling and fabrication.

 Bolts, nuts, washers, screws and fixing accessories.

 Surface preparation, primer and painting.

Volume-III, PRICE BID VKV RWSS

 Transportation, erection, labour, tools and tackles.

 All incidental charges necessary for complete installation.

The item shall be complete in all respects and approved by the Engineer-in-Charge

ITEM NO. 14 Providing, installing & commissioning Flash mixer impeller with motor,

gear arrangement & electrical cable, connections, control panels etc.(size as

Materials and Equipment

1. Flash Mixer Impeller

o Fabricated from M.S. with epoxy coating or Stainless Steel as specified in the design.

o Size, number of blades and configuration shall be as per approved design requirements.

o Suitable diameter and length designed to withstand operational loads.

o Manufactured from Stainless Steel or approved corrosion-resistant material.

3. Electric Motor

o Three-phase squirrel cage induction motor conforming to relevant IS standards.

o Suitable HP and RPM as per design requirements.

o TEFC (Totally Enclosed Fan Cooled) type with IP-55 or higher protection.

4. Gearbox/Gear Arrangement

o Helical, worm reduction or equivalent gearbox designed to provide the required impeller

o Capable of continuous operation under full load conditions.

5. Control Panel

o Floor-mounted or wall-mounted control panel fabricated from CRCA sheet.

o Equipped with MCCB/MCB, contactors, overload relays, indicating lamps, voltmeter, ammeter,

selector switches and necessary protection devices.

6. Electrical System

o Suitable power and control cables.

o Cable glands, lugs, conduits and cable trays where required.

o Earthing system complete with earth connections.

o Base frame, coupling, guards, fasteners, anchor bolts and vibration-resistant mounting

o All hardware necessary for complete installation.

1. The flash mixer assembly shall be installed at the designated location in accordance with approved drawings

and manufacturer’s recommendations.

2. The motor, gearbox, shaft and impeller shall be properly aligned and securely mounted.

3. Anchor bolts and supporting structures shall be adequately designed to withstand operational loads and

4. Electrical wiring and cable connections shall be carried out by qualified personnel.

5. Earthing shall be provided as per applicable electrical standards.

Testing and Commissioning

1. Mechanical alignment and free rotation of the impeller shall be checked before commissioning.

2. Insulation resistance and electrical continuity tests shall be carried out prior to energization.

3. Trial run shall be conducted to verify smooth operation, vibration levels and power consumption.

4. The mixer shall be operated continuously for a specified period to demonstrate satisfactory performance.

5. Any defects observed during testing shall be rectified by the contractor at no extra cost.

6. Commissioning shall be deemed complete only after successful performance testing and approval by the

Engineer-in-Charge.

Volume-III, PRICE BID VKV RWSS

Measurement shall be made on a Per Unit (Each) basis for the complete flash mixer system

installed, tested and commissioned.

The rate shall include:

 Supply of flash mixer impeller, shaft, motor and gearbox.

 Control panel, cables, wiring and electrical accessories.

 Base frame, couplings, guards and mounting arrangements.

 Transportation, loading, unloading and handling.

 Installation, alignment, testing and commissioning.

 Labour, tools, tackles and consumables.

 Electrical connections, earthing and safety devices.

 All incidental charges required for complete and satisfactory operation.

The item shall be complete in all respects and fully operational as per approved design and

specifications of the Engineer-in-Charge.

Signature of contractor Executive Engineer

Public Health Works Division