Dediyasan Group Regional Water Supply Scheme Based on Narmada Main Canal. Ta:-Mehsana/Jotana Dist:-Mehsana.

Estimated Cost: Rs.

Executive Engineer

Gujarat Water Supply & Sewerage Board

P.H. Works Division, MEHSANA

Volume-III, PRICE BID

(1) Name of Work:- “The Shifting of Sametra Rising Main of 508 mm Dia MS Pipeline

Under M&R Programme of Dediyasan Group RWSS in Proposed Upgradation &

Strengthening of Mahesana Bechraji Road’’”

(2) 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

(3) 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.

(4) 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.

be free supplied from the by client.

(6) 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.

and evaluation.

(9) 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.

(10) 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.

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

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

Volume-III, PRICE BID

bidder shall be deemed to have covered the 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.

the pendency of the Contract. In case of any discrepancy noted in the

arithmetic corrections if any will be considered for financial evaluation of

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

(15) 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.

(16) 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 another.

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

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

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

(20) 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 shall fill in the

(22) 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.

(23) 1% of the value of work will be deducted from the Running bill against

labour cess which is non refundable.

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

of the same will be borne by GWSSB.

Volume-III, PRICE BID

(25) 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

(26) 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.

(27) 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.

(28) 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.

(29) 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.

(30) 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 authority.

(31) 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.

(32) 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.

(33) 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, payment details and such other documents

as may be required for the purpose.

Volume-III, PRICE BID

(34) 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

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

THE EXECUTIVE ENGINEER,

PUBLIC HEALTH WORKS DIVISION,

SUB: “The Shifting of Sametra Rising Main of 508 mm Dia MS Pipeline Under M&R Programme

of Dediyasan Group RWSS in Proposed Upgradation & Strengthening of Mahesana Bechraji

Road’’ 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

Schedules etc. including Addenda/Amendments to the above, for the 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 drawings, conditions of

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

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 Contract”.

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 in time.

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

NAME OF SCHEME – Dediyasan Group Regional Water Supply Scheme Based on Narmada Main

Canal. Ta:-Mehsana/Jotana Dist:-Mehsana

Name of Work:- “The Shifting of Sametra Rising Main of 508 mm Dia MS Pipeline

Under M&R Programme of Dediyasan Group RWSS in Proposed Upgradation &

Strengthening of Mahesana Bechraji Road”

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 to

Rate at which the material will

Particular Qty. be charged to the contractor

1. The contractor submitting the Tender shall see that the rate in Schedule-A are

filled in by the Engineer in Charge at the time of issue tender.

2. Binding wire of 15 gauge of thinner gauge required for placing the reinforcement

in position shall be provided at his own cost.

3. All the materials required for the items other than labour in Schedule-A but

available with the dept. will be issued on request to the contractor. (for use in this

contract only) at prevailing market rates or departmental issue rates whichever is

4. 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

5. 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.

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

market as per specification.

7. 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.

8. Contractor should return the balance materials in good and acceptable

condition, otherwise recovery at the double rates will be affected in view of Clause

Volume-III, PRICE BID

Signature of contractor Executive Engineer

Public Health Works Division

Volume-III, PRICE BID

SUMMARY (SCHEDULE-B)

Name of Work:- “The Shifting of Sametra Rising Main of 508 mm Dia MS Pipeline Under M&R

Programme of Dediyasan Group RWSS in Proposed Upgradation & Strengthening of Mahesana

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________% above Add________% above

Signature of contractor Executive Engineer

Public Health Works Division

ITEM DESCRIPTION Qty. Unit Rate Amount

1 Manufacture, Supply & Delivery of Electric 100.00 Rmt. 5509.00

Resistance Welded (Up to 400mm)/Submerged Arc

Welded(Above 400mm) M.S.Pipe having beveled

ends plate or coil conforming to IS-3589-2001 or its

latest revision/ ammendment for following thickness

outside diameter at GWSSB store or site anywhere in

Gujarat State including all taxes, insurance,

transportation, freight charges, octroi, inspection

charges, loading, unloading conveyance to

Departmental stores, stacking etc. all complete.

(Rate for MS Pipe based on the ex. works price of HR

Coil as Rs.58500 per MT - withouth GST (Above

mm to 10 mm) & Rs. 59000.00 per MT without GST

(Above 10 mm) as onJan-23.( WPI Index of H. R Coil

of Dec-22 is 144)

508 mm dia 6.3 mm thick

2 MS Specials (2% of Pipe Cost) 1.00 LS 11018.00

M.S.Specials flange ends

Above 300 mm Dia

3 Excavation for pipe line trenches For Water Supply 900.00 Cmt. 89.00

Sewerage line manhole etc. All With Shoring And

Strutting If Reqd. As Per Required Gradient Adn line

incl. all safety provisions using site rails and stacking

excavated stuff up to all required lead. cleaning the

site etc. complete for lifts and strata as specified.

a) In all sorts of soil and soft murrum up to 1.50 mt

1.50 mt to 3.00 mt depth 600.00 Cmt. 98.00

4 Lowering laying, Jointing & Welding in position to 300.00 Rmt. 427.00

correct line & level M.S. Pipe with/without outer

gunniting & inside lining/Epoxy painting on pedestal

or chairs upon prepared formation or prepared

bedding in trenches the rates include conveyance

from store to site of work loading, unloading, joint

plastering, hydrotesting etc.complete. Above 4mm

to 7 mm Thick - 508 mm Dia

5 Refilling the pipeline trenches incl. ramming, 839.23 Cmt. 22.00

watering, consolidating desposal of surplus stuff as

directed within a radius of 3 km.

6 Labour charges for repairing of leakage in MS 6.00 No. 6391.00

pipeline of folling dia meter at different places

including necessary excavation manually or by

mechanise excavation, dewatering removing of mud,

cleaning of pipe and leakage portion, grinding,

cutting the pipeline or joint if necesaary incl.

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

welding the joint by using ISI Marked welding rods

duly approved by EIC of appropriate number and size

inclusive of excavator, Hydra/Crane, DG set,

welding machine, Gas cutter with LPG Cylinder,

Oxygen cylinder, Grinding machine etc. with fuel,

operator& labour as required. (incl. all material but

Exclu. cost of pipe)508 mm dia

7 Providing and supplying C. I. Temper proof Air valves 1.00 No. 19110.00

with SS 304 Float gun metal- nozzle of approved

make & quality of following class and diameter

including all taxes, insurance, transportation,

freight charges, octrol, inspection charges, loading,

unloading, conveyance to deparimental stores,

stacking etc. complete.

100 mm dia With Isolating Sluice Valve PN

8 Lowering, laying and jointing in position following C. 1.00 No. 526.00

|. / D/F Reflux valves, Butterfly valves, Sluice

valves and Air valves including cost of all labour,

jointing material, including nut bolts and giving

satisfactory hydraulic testing, etc. complete.

100 mm dia Air valves double ball Flanged

9 Erection of airvalve riser by installing new M.S pipe 1.00 No. 5543.00

of 6mm thick and 3.2mt length with necessary

fittings such as flange of appropriate size,nut bolts

and embeded the pipe in R CC M15 with offset of

cm around pipe with necessary steel etc

complete.Dia of Air Valve 100mm& MS Pipe

10 Dewatering by pumping set of required capacity 480.00 Hp/hr 18.32

including temporary platform carting pumping at

site and fixing the same in position including all

accessories, and fuel and labour etc. complete.

(No./HP/Per Hour/Day)

11 Gas Cutting of MS Pipe/Plates For followng 79.76 Rmt. 56.00

thickness. Gas cutting (Either square cut or V cul)

pipes, plates etc. including all costs for the Above

mm up to 10 mm MS 508 mm dia

12 Providing C.C.M.:100 for encasing pipes using trap 12.00 Cum 3368.55

metal size 12 mm to 50 mm incl. form work curing

consolidation etc. complete for various location on

pipe line (A) Using trap metal 40 mm size

Nine Lakh Eighty Seven Thousand Seven Hundred Thirty Eight Rupees and Sixty Paise

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.

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

Estimated amount put to tender: Estimated amount put to Tender

Deduct________% above Add________% above

SIGNATURE OF CONTRACTOR Deputy Executive Engineer

Public Health San. Sub Division

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

Item No. 1 Manufacture, Supply & Delivery of Electric Resistance Welded (Up to

400mm)/Submerged Arc Welded(Above 400mm) M.S.Pipe having beveled ends

plate or coil conforming to IS-3589-2001 or its latest revision/ ammendment for

following thickness outside diameter at GWSSB store or site anywhere in Gujarat

State including all taxes, insurance, transportation, freight charges, octroi,

inspection charges, loading, unloading conveyance to Departmental stores,

stacking etc. all complete. (Rate for MS Pipe based on the ex. works price of HR

Coil as Rs.58500 per MT - withouth GST (Above 3.15 mm to 10 mm) & Rs.

59000.00 per MT without GST (Above 10 mm) as onJan-23.( WPI Index of H. R Coil

of Dec-22 is 144)

508 mm dia 6.3 mm thick GENERAL

1. General & Dimensional Parameters

* Item Description: Mild Steel (M.S.) Pipe

* Nominal Size / Outside Diameter (OD): 508 mm (20 inch Nominal Bore)

* Specified Wall Thickness: 6.3 mm

* Manufacturing Process / Type: Submerged Arc Welded (SAW)

(As per item description: ERW is used up to 400 mm OD, while SAW / LSAW / HSAW

is specified for sizes Above 400 mm OD).

* Standard / Code: Conforming to IS 3589:2001 (or its latest revision/amendment).

* Raw Material Base: Hot Rolled (HR) Steel Coils/Plates conforming to IS 2062 / IS

* End Condition: Beveled Ends for butt welding.

* Nominal Mass / Unit Weight: Approximately 77.9 kg/meter (calculated as per IS

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

2. Standard Tolerances (As per IS 3589:2001)

| Parameter | Permissible Tolerance

| Outside Diameter (OD) | \pm 0.75\% |

| Wall Thickness | \pm 10\% |

| Straightness | Max deviation of 0.2% of total pipe length |

| Ovality | Max 1% for specified diameter |

3. Material & Mechanical Properties (Standard IS 3589 Grades)

| Property | Value Range / Standard Requirement |

| Steel Grade | Commonly Fe 330 / Fe 410 / Fe 450 |

| Minimum Yield Strength (R_{eH}) | 195 MPa (Fe 330) / 235 MPa (Fe 410) / 275 MPa

| Minimum Tensile Strength (R_m) | 330 MPa (Fe 330) / 410 MPa (Fe 410) / 450 MPa

| Elongation | 15% to 20% minimum (depending on grade) |

4. Quality Control & Testing Requirements

* Hydrostatic Test:

* Each pipe must undergo hydrostatic pressure testing at the factory held for a

minimum of 5 seconds without showing leakage.

* Calculated using P = \frac{2ST}{D} as per IS

* Visual & Dimensional Inspection: Clean surface free from cracks, folds, or defects.

* Non-Destructive Testing (NDT): Radiographic / Ultrasonic testing on welded seams as

applicable under IS

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

* Marking: Stenciling on each pipe specifying manufacturer name/trademark, outside

diameter (508\text{ mm}), wall thickness (6.3\text{ mm}), pipe designation, and BIS ISI

certification mark.

5. Scope of Supply & Commercial Terms Included in Item Rate

* Base HR Coil Pricing Basis: Calculated on ex-works price of HR coil at ₹58,500.00 /

MT without GST (for thickness up to 10 mm) at base index of Jan-23 (WPI Dec-22 =

* Delivery Scope: Supply, manufacture, testing, third-party inspection, loading,

transportation/freight, transit insurance, octroi/entry tax, unloading, and stacking at

any GWSSB departmental store or project site anywhere in Gujarat State.

UNIT OF RATE: The unit of rate shall be per Rmt.

Item No:-2 MS Specials (2% of Pipe Cost)

M.S.Specials flange ends Above 300 mm Dia

1) Manufacture, Supply & Delivery of M.S. Specials of various diameter and class. The

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

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

2) Specials shall conform to the appropriate dimensions as Section 4 of BS 534:1990.

Specials shall be formed from straight pipes butt-welded by metal arc process.

3) M.S. Specials with all types of diameters suitable to pipes with inner cement mortar

4) The coating and lining on the straight pipe shall be cut back from the points to

welded or cut for sufficient distance to ensure that no material intended to

remain part of the coating is damaged by the cutting or welding process.

5) Welding of specials shall be of standard equal to that of straight pipes and are

subjected to a 100% radiographic test.

6) All fillet welds shall be subjected to air tests appropriate and/or magnetic

crack detection test.

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

7) The outside diameter of specials shall conform to the outside diameter of the

standard straight pipes.

8) The ends of pipe-ended specials shall be truly circular and shall conform to the

tolerance required for fitting of mechanical couplings and flange adaptors.

VOLUME: IV, TECHNICAL SPECIFICATIONS Civil GWSSB MEHSANA

9) The necessary M.S. Specials required during the lowering & lying of M.S. Pipe shall

be supplied by the agency and shall be as per standard specification and as per

IS specification. It shall be of best quality as per requirement. Rate shall be

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

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

MODE OF MEASUREMENT AND PAYMENT

The Payment Should be in Lump Sum basis.

Item No- 3 Excavation for pipe line trenches For Water Supply Sewerage line

manhole etc. All With Shoring And Strutting If Reqd. As Per Required Gradient

Adn line incl. all safety provisions using site rails and stacking excavated stuff up

to all required lead. cleaning the site etc. complete for lifts and strata as specified.

a) In all sorts of soil and soft murrum up to 1.50 mt depth

b) 1.50 mt to 3.00 mt depth

The excavation for trenches will generally, refer to open excavation for trenches in wet /

dry conditions for pipe laying work.

CLEARING OF SITES:

The site on which the pipelines are to be laid and shown on plan and the area required

for setting out and other operations shall be cleared and all obstruction loose stones and

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

the roots shall be entirely grubbed up. The products of the clearing to restocked in such a

place and in such a manner, as directed by the engineer in charge. In jungle clearings, all

trees not specially marked for preservation, bamboo’s jungle wood and brushwood shall

be cut down their roots grubbed up. All wood and materials from the clearing shall be the

property of the Board shall be arranged as directed by the Board Engineer or his

authorized agent, the material pronounced as useful by the Engineer will be

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

conveyed and properly stacked as directed within the specified limit. Unless materials will

be burnt or otherwise disposed off as directed. All holes or hollows whether originally

existing or produced by digging up roots, shall be carefully filled up with earth, well earth,

well rammed leveled off, as may be directed.

3.0 SETTING OUT:

The center lines of all pipe trenches etc. 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 then as long as required true to line, level curve and slopes. The

contractor shall assure full responsibility for alignment, and dimension of trench. The

labor materials etc. required for setting out and establishing benchmarks and other

reference marks shall be arranged by the contractor at his own cost.

The excavation incl. Bailing out of water for the pipe trenches shall also incl. Removal of

all materials of whatever nature and whether wet or dry condition necessary for laying of

pipelines exactly in accordance with alignment, levels grades and curves shown on the

plans or as directed by the Engineer-in-charge. Trenches shall be excavated to the exact

width and depth according to the size of pipe and the sides shall be left vertical as far as

possible or according to the angle of repose of various soils. Unless there is a specific

extra provision in the contract for shoring and strutting or for cutting side slopes the

contractor shall at his own cost do the necessary shoring and strutting or cutting of

slopes to a safe of repose or both approved by the Engineer-in-charge. As per Site

condition if Extra width or depth require then prior permission of concern chief engineer

is require. 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

disturbed. The bottom of the trenches shall be leveled both longitudinally and

transversely or slopped as directed by the Engineer. The contractor shall at his own cost

to remove such portions of boulders or rocks, as are rectified to make the bottom of the

trench level. No filling shall be allowed to bring the trench to level. If by contractor’s

mistake excavation is made deeper than shown on the plans and if ordered by the

Engineer the extra depth shall have to be made with selected excavated stuff only with

watering, remedying etc. as directed, by the Engineer and at the cost of the contractor.

Other hard excavation shall be cleared of all sorts and loose materials and cut to firm

surface, either level, stepped as directed by the Engineer. The Engineer may order such

charges in the dimensions and alignment of pipe trench as may be deemed necessary to

secure satisfactory cover over pipeline. The contractor shall, at his own expense, make

provision for bailing out of draining water and the trenches shall be kept free of water,

during laying work. After each excavation is completed, the contractor shall notify the

Engineer to that effect and no laying of pipeline will be allowed to laid until Engineer has

approved the depth and dimensions of trenches level and measurements. The minimum

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

width of trench should be 25 CM on each side of the pipe the rate includes cost of

dewatering, blasting if required and as per detailed specification etc complete.

5.0 SHORING AND STRUTTING:

Shoring & strutting and dewatering if required shall have to be carried out by the

contractor, for which any extra charge will not be paid During excavation if water

connections, sewage connections, telephone lines khalkuva (soak pits) etc. are damaged

by the contractor, the same shall have to be restored by the contractor without any extra

The trenches shall be strongly fenced and red light signal shall be kept at night and

arrangement of watchman to prevent accidents should be done, sufficient care 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.

7.0 The excavation in all sorts of soil, hard murram, soft rock or hard rock or any type of

soil shall have to be carried out up to the required depth by the agency, no extra payment

shall be given for soft/ hard rock.

8 DISPOSAL OF EXCAVATED STUFF

No excavated stuff from trench are to be placed even temporarily nearer than 1.5 meter or

greater distance up to 90 meter or as prescribed by the Engineer from the outer edge of

trench. All excavated material will be the property of the board. The rate of excavated

includes sorting out of useful materials and stacking then separately as directed within

specified lead. The excavated stuff suitable and useful for refilling or for other use shall be

stacked at convenient places. The materials not useful in any wet shall be disposal off as

directed by the Engineer from the outer edge of trench. 8.2 The site should be cleared off

on completion of work.

9.0 ADDITIONAL REQUIREMENTS

At the joints of pipes, the trench shall be excavated to an additional depth of 15 cm. and

width of 30 cm. And length of 15 cm. beyond the edge of collar on both the sides or as

directed. The rate include for such extra excavation made at the joints. The trenches shall

be excavated perfectly in straight line. The bottom of the trench shall be kept as per invert

level or as directed. To maintain the proper slop the usual method of site rails and boning

rods shall be adopted. The contractor shall have to provide and fix and maintain sight

rails and boning rod without any extra cost. If the contractor fails or makes delay to give

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

hydraulic test of the pipe line laid in any of the section, without any genuine reason, he

shall be responsible to get any part of the length trenches refill in such case i.e. before

tasting for safety of pedestrian and/or vehicular traffic as found necessary by the

engineer-in-charge without any extra cost. If found necessary any directed by the

Engineer-in-charge. The contractor shall have to excavate the refilled trenches, during

hydraulic test without any extra cost. 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 pipeline is done so as to make it suitable for the traffic.

The contractor shall provide direction when the pipeline is to be laid along the road as

required and shall maintain the diversion or any part of it, without any extra cost. At all

road crossings, the pipe shall be laid below the crest of read.

9.2 The contractor shall break the road surface by excavation chiseling to the exact width

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

excavated stuff shall be deposited in uniform layers to avoid mixing with other kind of

materials at non-objectionable place or as directed by the Engineer-in-charge.

MEASURMENT AND PAYMENT As per Price bid or Payment Schedule. This item of

excavation shall include unless and otherwise mentioned. (a) Clearing of site

(b) Setting out work including all materials and labour.

(c) Providing and subsequently removing, shoring and strutting outing slopes etc. (d)

Excavation and removal and staking of all excavated stuff as directed.

(e) Necessary protection including labour materials equipment etc. to ensure safety and

protection against risk or accident.

(f) Providing facilities for inspection and damage to property if caused during progress of

(g) Compensation for injury to life and damage to property if caused during progress of

(h) Restoring of water supply connections, sewer connections, telephone lines, khalkuva

soapiest etc. if damaged by contractor without extra payment.

(i) Dewatering of excavated pit trench during the progress of work.

(j) Clearing the site on completion of works directed by the Engineer.

MODE OF MEASUREMENT AND PAYMENT

The payment shall be made on Cubic Meter basis

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

Item No- 4 Lowering laying, Jointing & Welding in position to correct line &

level M.S. Pipe with/without outer gunniting & inside lining/Epoxy painting on

pedestal or chairs upon prepared formation or prepared bedding in trenches the

rates include conveyance from store to site of work loading, unloading, joint

plastering, hydrotesting etc.complete. Above 4mm to 7 mm Thick - 508 mm Dia

1 After the application and inspection of coating, the entire welded pipes shall be

normally lowered into the finished trench next day after completion of the coating where

2 The trenches shall be of sufficient width, to enable lowering of pipe without difficulty.

The trench bottom shall not be uneven.

3 15 Cm thick bedding be provided using the selected excavated soil/murmur without

any extra cost. The bidding shall be watered, rammed, and well consolidated before

laying of pipes.

4 Water present in the trench at the time of lowering shall be bailed out by the

contractor without any extra cost.

5 The pipes shall be brushed before lowering and laying or remover any soil or dirt etc.

that may have accumulated.

6 Cost of all materials like steel, cement, aggregate, bolts, nuts, washers, white lead,

grace, rubber packing etc. necessary for pipe lowering, laying and jointing.

7 Item covers the labor for laying pipes in trenches to correct alignment at required

depth with tools including cutting of pipes and specials if required for laying the pipes,

including connecting pipes, including connecting pipes to specials and appurtenances

and also the cost of scaffolding, tools and plants, ropes etc.

8 Testing of pipes for leakage under water pressure, and flushing the pipes after

testing. Water required for this hydraulic testing and construction work shall have to be

arranged by the contractor at his own cost.

9 The measurement shall be recorded in running meter of pipe length laid along center

line or axis of pipe line including tees, enlarges, reducers and bends correct up to 0.01M

length. No payment shall be made for overlaps etc.

MODE OF MEASUREMENT AND PAYMENT

 The payment shall be made on Rmt. basis.

Item No- 5 Refilling the pipeline trenches incl. ramming, watering, consolidating

desposal of surplus stuff as directed within a radius of 3 km.

On completion of the pipe laying operations in any section, for a length of about 100m

and while further work is still in progress, refilling of trenches shall be started by the

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

Contractor with a view of restricting the length of open trenches. Pipe laying shall

closely follow the progress of Trench Excavation and the Contractor shall not permit

unreasonably excessive lengths of trench excavation to remain open while awaiting

testing of the pipeline. If the Engineer considers that the Contractor is not complying

with any of the foregoing requirements, he may prohibit further trench excavation until

he is satisfied with the progress of laying and testing of pipes and refilling of trenches.

The excavated material nearest to the trench shall be used filling. Care shall be taken

during backfilling, not to injure or disturb the pipes, joints or coating. Filling shall be

carried out simultaneously on both sides of the pipes so that unequal pressure does not

occur. Walking or working on the completed pipeline unless the trench has been filled

to height of at least 30cm over the top of the pipe except as may be necessary for

tamping etc., during backfilling work. The remaining portion of the trench may be filled

in with a mixture of hard and soft material free from boulders and clods of earth larger

than 150mm in size if sufficient quantity of good earth and murrum are not available.

The trench shall be refilled so as to build up to the original ground level, keeping due

allowance for subsequent settlement likely to take place. The top 300mm layer or fertile

agricultural soil shall be kept aside during excavation and shall be laid in layers near

ground level during refilling. To prevent buckling of pipe shell of diameters 1200mm

and above, pipes shall be strutted from inside while the work of refilling is in progress,

for which no separate payment shall be made. Strutting shall be done by means of

strong spiders having at least 6 arms which shall be sufficiently stiff to resist all

deformation. Spiders shall be provided at a maximum interval of 2m & shall be welded

in such a way that internal coating does not get burnt. The Engineer shall, at all times,

have powers to decide which portion of the excavated materials shall be for filling and in

which portion of the site and in what manner it shall be so used. If any material

remains as surplus it shall be disposed of as directed by the Engineer, which includes

loading, unloading, transporting and spreading as directed within all lead. If the

Contractor fails to remove the earth from site within 7 days after the period specified in

a written notice, the Engineer may arrange to carry out such work at the Contractor's

risk and cost or may impose such fine for such omission as he may deem fit. Particular

care shall be taken to keep the trench dry during the entire refilling operation. If

suitable material for refilling is not available for excavation the Contractor shall bring

earth, murrum of approved quality as directed by the Engineer. No mechanical plant

other than approved compacting equipment shall run over or operate within the trench

until backfilling has reached its final level or the approval of the Engineer has been

obtained. Subsidence in filling in : Should any subsidence take place either in the filling

of the trenches or near about it during the maintenance period of 24 months from the

completion of the Contract Works, the Contractor shall make good the same at his own

cost or the Engineer may without notice to the Contractor, make good the same in any

way and with any material that he may think proper, at the expense of the Contractor.

The Engineer may also, if he anticipates occurrence of any subsidence, employ persons

to give him timely notice of the necessity of making good the same, and the expenses on

this account shall be charged to the Contractor. Payment shall be as per payment

MODE OF MEASUREMENT AND PAYMENT

 The payment shall be made on Cum basis.

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

Item No: 6 Labor charges for repairing of leakage in MS pipeline of following

diameter at different places including necessary excavation manually or by

mechanize excavation, dewatering removing of mud, cleaning of pipe and leakage

portion, grinding, cutting the pipeline or joint if necessary incl. welding the joint

by using ISI Marked welding rods duly approved by EIC of appropriate number and

size inclusive of excavator, Hydra/Crane, DG set, welding machine, Gas cutter

with LPG Cylinder, Oxygen cylinder, Grinding machine etc. with fuel, operator&

labour as required. (incl. all material but Exclu. cost of pipe)508 mm dia

The * Scope of Work Included:

* Necessary manual / mechanized excavation.

* Dewatering, removing of mud, and cleaning of pipe at the repair portion.

* Grinding and cutting of the pipeline or joint, if necessary.

* Welding using ISI Marked welding rods duly approved by the Engineer-in-Charge

(EIC) of appropriate make and size.

* Machinery & Tools Included: Inclusive of excavator, Hydra/Crane, DG set, welding

machine with LPG cylinder, Oxygen cylinder, Grinding machine, etc., along with required

fuel and labor.

* Pipe Diameter: 508 mm dia

* Inclusions & Exclusions: Inclusive of all materials required for the repair work, but

excluding the cost of the pipe.

MODE OF MEASUREMENT AND PAYMENT

 Measurement shall be paid on No. basis as per relevant dia of the item as per

payment schedule.

Item No :7 Providing and supplying C. I. Temper proof Air valves with SS

Float gun metal- nozzle of approved make & quality of following class and

diameter including all taxes, insurance, transportation, freight charges, octrol,

inspection charges, loading, unloading, conveyance to deparimental stores,

stacking etc. complete.

100 mm dia With Isolating Sluice Valve PN

General Tamper proof air valve confirming to AWWA C 512, having outlet for admission

and release of bulk volume of air during emptying and filling of the pipeline. The ball

sealed orifice shall always remain open while air is exhausting and is immediately closed

when Water rises in the chamber, lifts the ball and seals the orifice. It shall also ensure

that there are no recesses or pockets, sheltering, escaping air for the large orifice (low

pressure) ball to drop into when the valve open. Turbulent air at the time of filling of pipe

shall not circulate in such cavities and cause the ball to blown into when the valve is

open. Turbulent air at the time of filling of pipe shall not circulate in such cavities and

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

cause the ball to blown into the discharging air streams, blowing the valve shut

prematurely. The cone angle of the lower pressure chamber shall be such that even at the

critical velocity of all air escape at 300 m/sec. The total impact force on the ball is less

than the suction force on the angular area between the ball and the cone. The design of

the valve should be such as to allow maximum free air discharge at various pressure

differentials. The low pressure cover shall be massive and designed to withstand full

operating thrust in working Conditions. The seat ring shall be held securely in place

under the low pressure cover by a joint support ring to prevent it from sagging when the

ball is not sealing the orifice. Testing All valves shall hydrostatically tested by the

manufacturer before dispatch. The pressure shall be obtained without any significant

hydraulic shock. Testing shall be carried on before application of paint. There shall be no

air entrapped within the part of the valves subjected to test pressure. Test pressure as per

AWWA C512 or API 598. Positive material Identification (PMI Test) PMI test shall be

checked at random for Stainless steel parts. Test Certificates When specified by Owner,

the manufacturer shall issue a test certificate confirming that the valves have been tested

in accordance with this standard and stating the actual pressures and medium used in

the test. Marking Marking shall be cast integral on the body or on a plate securely

attached to the body for ‘DN’ size, ‘PN’ rating, Heat Number and Serial number. Painting

Each valve shall be drained, cleaned, prepared and suitable protected with 2 coats of red

oxide and then black bituminous paint for minimum of 150 micron DFT on surfaces

before dispatch.General Tamper proof air valve confirming to AWWA C 512, having outlet

for admission and release of bulk volume of air during emptying and filling of the pipeline.

The ball sealed orifice shall always remain open while air is exhausting and is

immediately closed when Water rises in the chamber, lifts the ball and seals the orifice. It

shall also ensure that there are no recesses or pockets, sheltering, escaping air for the

large orifice (low pressure) ball to drop into when the valve open. Turbulent air at the time

of filling of pipe shall not circulate in such cavities and cause the ball to blown into when

the valve is open. Turbulent air at the time of filling of pipe shall not circulate in such

cavities and cause the ball to blown into the discharging air streams, blowing the valve

shut prematurely. The cone angle of the lower pressure chamber shall be such that even

at the critical velocity of all air escape at 300 m/sec. The total impact force on the ball is

less than the suction force on the angular area between the ball and the cone. The design

of the valve should be such as to allow maximum free air discharge at various pressure

differentials. The low pressure cover shall be massive and designed to withstand full

operating thrust in working Conditions. The seat ring shall be held securely in place

under the low pressure cover by a joint support ring to prevent it from sagging when the

ball is not sealing the orifice. Testing All valves shall hydrostatically tested by the

manufacturer before dispatch. The pressure shall be obtained without any significant

hydraulic shock. Testing shall be carried on before application of paint. There shall be no

air entrapped within the part of the valves subjected to test pressure. Test pressure as per

AWWA C512 or API 598. Positive material Identification (PMI Test) PMI test shall be

checked at random for Stainless steel parts. Test Certificates When specified by Owner,

the manufacturer shall issue a test certificate confirming that the valves have been tested

in accordance with this standard and stating the actual pressures and medium used in

the test. Marking Marking shall be cast integral on the body or on a plate securely

attached to the body for ‘DN’ size, ‘PN’ rating, Heat Number and Serial number. Painting

Each valve shall be drained, cleaned, prepared and suitable protected with 2 coats of red

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

oxide and then black bituminous paint for minimum of 150 micron DFT on surfaces

before dispatch.

MODE OF MEASUREMENT AND PAYMENT

 Measurement shall be paid on No. basis as per relevant dia of the item as per

payment schedule.

Item No- 8 Lowering, laying and jointing in position following C. |. / D/F Reflux

valves, Butterfly valves, Sluice valves and Air valves including cost of all labour,

jointing material, including nut bolts and giving satisfactory hydraulic testing,

100 mm dia Air valves double ball Flanged

* Description: Lowering, laying, and jointing in position following C.I. / D/F Reflux

valves, Butterfly valves, Sluice valves, and Air valves.

* Inclusions: Includes cost of all labour, jointing material, nut bolts, and giving

satisfactory hydraulic testing, etc. complete.

* Valve Specification: 100 mm dia Air valves double ball Flanged

Detailed Terms & Conditions:

* Materials Supply: The jointing material such as coupling, bends, tees, solution, etc.

is to be supplied by the contractor.

* Scope of Contractor's Work: Jointing shall be carried out by the contractor at his

own cost including labour, excavation, dewatering, removing of mud, cleaning of pipe

and leakage portion, cutting, removing, fitting, testing, refilling, etc.

* PVC Pipeline Equipment: For jointing in PVC pipe line, pipe cutting equipment, piece

of pipes, solvent, suitable clamps, specials, nut bolts, etc. are to be supplied by the

* Site Restoration: After completion of the jointing of pipe, the excavated trench shall

be refilled to the level of the surrounding ground.

MODE OF MEASUREMENT AND PAYMENT

 The payment shall be made on No. basis as per Price bid or Payment schedule

Item No:9 Erection of airvalve riser by installing new M.S pipe of 6mm thick and

3.2mt length with necessary fittings such as flange of appropriate size,nut bolts

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

and embeded the pipe in R CC M15 with offset of 10 cm around pipe with

necessary steel etc complete.Dia of Air Valve 100mm& MS Pipe

Erection of Air valve riser

1.0 SUPPLY OF MATERIAL

1.1 50 mm Dia Mild Steel pipe shall be supplied and carted by the contractor. The rate

shall include loading, unloading and stacking at site.

1.2 The mild steel pipe shall be examined before erecting for cracks and other flows. They

shall be undamaged in all respect.

1.3 The mild steel pipe shall be properly checked before erecting.

1.4 All grits and foreign materials shall be removed from the inside of MS pipe before

1.5 All the faces of pipe shall be thoroughly cleaned.

2.0 JOINTING MATERIAL

2.1 The contractor shall provide all necessary jointing materials such as nuts bolts,

rubber packing white zinc jute lead wool etc.

2.2 All tools and plant required for installation of sluice valve shall be provided by the

2.3 All jointing materials shall be not approved from the engineer-in-charge before use.

2.4 The nut and bolts shall conform to Item No MSP-19 of specification of materials.

2.5 The rubber packing shall confirm all specifications as narrated in Item No MSP-20 of

specifications of materials. Specifications for Air Riser for Pipeline are as under: The work

of air valve riser shall be carried as per drawing attached. Column/ Footings for Air riser

pipe shall be carried out in cement concrete M-150 using trap metal as per instructions

and workmanship of the engineering in charge. Materials and workmanship shall be

given in concrete section.” The reinforcement as per IS Standard and specifications. The

item Air Valve raising includes the cost of providing and laying cement concrete M-150

base MS clamps, MS pipe 4.50 mt., M.S. flange, nut, bolts, rubber packing and cement

concrete column in M-150 etc. complete.

MODE OF MEASUREMENT AND PAYMENT

 Measurement shall be paid on No. basis as per relevant dia of the item as per payment

Item No- 10 Dewatering by pumping set of required capacity including temporary

platform carting pumping at site and fixing the same in position including all

accessories, and fuel and labour etc. complete. (No./HP/Per Hour/Day)

The Contractor shall ensure that the excavation and the structures are free from water

during construction and shall take all necessary precautions and measures to exclude

ground/rain water so as to enable the works to be carried out in reasonably dry

conditions in accordance with the construction planning. Sumps made for dewatering

must be kept clear of the excavations/trenches required for further work. The method of

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

pumping shall be approved by Employer’s Representative, but in any case, the pumping

arrangement shall be such that there shall be no movement of subsoil or blowing in due

to differential head of water during pumping. Pumping arrangements shall be adequate

to ensure no delays in construction. The dewatering shall be continued for at least (7)

seven days after the last pour of the concrete. The Contractor shall, however, ensure

that no damage to the structure results on stopping of dewatering. The Contractor shall

study the sub-soil conditions carefully and shall conduct any tests necessary at the site

with the approval of the Employer’s Representative to test the permeability and drainage

conditions of the sub-soil for excavation, concreting etc., below ground level. The

scheme for dewatering and disposal of water shall be approved by the Employer’s

Representative. The Contractor shall suitably divert the water obtained from dewatering

from such areas of site where a buildup of water in the opinion of the Employer’s

Representative obstructs the progress of the work, leads to unsanitary conditions by

stagnation, retards the speed of construction and is detrimental to the safety of men,

materials, structures and equipment. When there is a continuous inflow of water and

the quantum of water to be handled is considered in the opinion of Employer’s

Representative, to be large, a well point system- single stage or multistage, shall be

adopted. The Contractor shall submit to the Employer’s Representative, details of his

well point system including the stages, the spacing, number and diameter of well

points, headers etc., and the number, capacity and location of pumps for approval.

MODE OF MEASUREMENT AND PAYMENT

 The payment shall be made on HP/hr basis

Item No- 11 Gas Cutting of MS Pipe/Plates For followng thickness. Gas cutting

(Either square cut or V cul) pipes, plates etc. including all costs for the Above

mm up to 10 mm MS 508 mm dia

1. Description of WorkThis item covers the labor, equipment, and consumables

required to perform gas cutting (oxy-acetylene/oxy-LPG or plasma cutting) on Mild Steel

(MS) pipes and plates. The scope includes:

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

* Executing clean, precise cuts according to line design requirements.

* Performing Square Cuts (straight standard cuts perpendicular to the pipe axis) or V-

Groove Cuts / Bevel Ends (prepped for subsequent butt welding).

* Cleaning and dressing the cut edges (removing slag, burrs, and oxidation) to ensure

the surface is smooth and ready for fit-up/welding.

2. Technical & Dimensional Limits

* Applicable Pipe Size: 508\text{ mm} Nominal Outside Diameter (OD).

* Thickness Range: Above 5\text{ mm} up to 10\text{ mm} wall thickness.

* Material: Mild Steel conforming to IS:3589 / IS:2062.

3. Operational & Safety Scope (All-Inclusive)

The rate quoted for this item includes all incidental operations and resources,

* Equipment & Consumables: Gas cylinders (Oxygen, Acetylene/LPG), cutting torches,

nozzles, hoses, regulators, and protective gear.

* Labor Costs: Skilled operators/fitters for marking, alignment, cutting, and edge

* Edge Preparation: Removing scale, rust, and slag formed during the thermal cutting

* Handling: Positioning, holding, and rotating the 508\text{ mm} pipe safely during the

cutting procedure.

4. Mode of Measurement & Payment

* Unit of Measurement: Typically measured per Cut or per Joint/Perimeter cut (in Rmt)

as specified in the Bill of Quantities (BOQ).

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

* Payment Condition: Payment is certified upon completion of the cut to full specified

bevel/square geometry without surface defects or gouges that exceed acceptable

tolerances for structural welding.

Item No- 12 Providing C.C.M.:100 for encasing pipes using trap metal size 12 mm

to 50 mm incl. form work curing consolidation etc. complete for various location

on pipe line (A) Using trap metal 40 mm size

Aggregate The course aggregate and the fine aggregate for the concrete shall be hard,

clean, tough & durable and shall e free from all deleterious matter such as dust, lump

of clay, soft & flaxy pieces, shale alkali, organic matter. The materials shall be got

approved by the Engineer-In-Charge or his agent. Proportion The proportion of course

and fine aggregate shall be that one part of cement, three parts of fine aggregates & Six

parts of course aggregates by volume. The proportion of cement & water of the water

cement ratio shall be as specified, having regard to the nature of work & strength to be

developed. Mixing Whether the concrete is mixed by hand or in a mechanical mixture. It

shall be thoroughly mixed and the concrete placed in its final position with the

minimum of delay. Every pieces of aggregate shall be uniformly coated by cement paste.

Laying & Consolidation The concrete must be laid gently (Not dumped) from height so

as not to pent segregation of aggregates .after placing it shall be well compacted by

tampl and/or mortar to cream up. In no case ramming shall be prolonged after the

cement has begun to take its initial set. In no case, more water is added in order to

reduce the work of completion. Curing. As soon as the concrete has set sufficiently the

surface shall be protected from rapid during by being covered with wet sand, wet gunny

bags or where possible by foaming shallow pools water on the top. The setting shall be

continued for at least 10 days & usually two to three weeks. Workmanship Water stops

shall be cleaned before placing them in position. Oil or grease shall be removed

thoroughly using water and suitable detergents. Water stops shall be procured in long

lengths as manufactured to avoid joints as far as possible. Standard L or T type of

intersection pieces shall be procured for use depending on their requirement. Any non-

standard junctions shall be made by cutting the pieces to profile for jointing. Lapping of

Volume-III, PRICE BID DEDIYASAN GROUP RWSS

water stops shall not be permitted. All jointing shall be of fusion welded type as per

manufacturer's instructions. Water stops shall be placed at the correct location/level

and suitably supported at intervals with the reinforcement to ensure that it does not

deviate from its intended position during concreting and vibrating. Care shall also be

taken to ensure that no honey-combing occurs because of the serrations/end grips, by

placing concrete with smaller size aggregates in this region. Projecting portions of the

water stops embedded in concrete shall be thoroughly cleaned of all mortar/ concrete

coating before resuming further concreting operations. The projecting water stop shall

also be suitably supported at intervals with the reinforcement to maintain its intended

position during concreting so as to ensure that it does not bend leading to formation of

pockets. In addition, smaller size aggregates shall be used for concreting in this region

Mode of payment 80% payment if necessary shall be made after laying of concrete &

20% payment shall be release after completion of curing period of exposed surface. The

rate shall be paid per cum. of completed work as per payment schedule.

Sign of Contractor Deputy Executive Engineer

P. H. San Sub Division