Technical Specification_SIDCL.pdf

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Chapter 7 TECHNICAL SPECIFICATIONS

TABLE OF CONTENTS

Preamble

Section 100 General

101 Introduction

102 Definitions

103 Materials and Test Standards

104 Sieve designations

105 Scope of Work

106 Construction Equipment

107 Contract Drawings

108 Site Information

109 Setting out

110 Public Utilities

111 Precautions for safeguarding the environment

112 Arrangement for Traffic during construction

113

General rules for the measurement of works for payment

114

Scope of rates for different items of work

115 Methodology and sequence of work

116 Crushed stone aggregates

117 Approval of materials

118 Supply of quarry samples

119 Use of surface by construction traffic

120 Site Office for Engineer and other supervisory staff

121 Field Laboratory

122

Site residential accommodation for Engineer and other supervisory staff123 Providing and maintaining Wireless Communication System / Mobile Phones

124 Providing and maintaining Project Vehicle

125 Deleted

126 Deleted

127 Deleted

128 Tolerance


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129 Temporary Buildings and Site Services

130 Hoardings and Fencing

131 Project Information signboards

132 Reports and Documentation

Section 200 Site Clearance

201 Clearing and grubbing

202 Dismantling culverts, bridges and other structures / pavements

203 Other site Clearance matters

Section 300 Earthwork, Erosion Control and drainage

301 Excavation for roadway and drain

302 Blasting operations

303 Presplitting rock excavation slopes

304 Excavations for structures

305 Embankment construction

306 Soil Erosion and sedimentation control

307 Turfing with sods

308 Seeding and mulching

309 Surface/sub-surface drains

310 Preparation and surface treatment of formation

311 Works to be kept free of water

312 Water Courses at Culvert

313 Construction of rockfill embankment

314 Granular Backfill

315 Permeable Backfill

Section 400 Sub-bases, Bases (Non-bituminous) and Shoulders

401 Granular sub-base

404 Water bound macadam sub-base/base

405 Crushed cement concrete sub-base/base

406 Wet mix macadam sub-base/base

407 Shoulders, islands and median


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408 Cement concrete kerb and kerb with channel

409 Footpaths and separators

410 Crusher-run macadam base

Section 500 Bases and Surface Courses (Bituminous)

501 General Requirements for Bituminous Pavement Layers

502 Prime coat over granular base

503 Tack coat

504 Bituminous macadam

505 Bituminous penetration macadam

506 Built-up spray grout

507 Dense bituminous macadam

508 Semi-dense bituminous concrete

509 Bituminous concrete

510 Surface dressing

511 Open graded premix carpet

512 Mix seal surfacing

513 Seal coat

514 Supply of mineral aggregates for pavement courses

515 Mastic Asphalt

516 Slurry seal

517 Recycling of bituminous pavement

Section 800 Traffic signs. Marking & Other Road Appurtenances

801 Traffic signs

802 Overhead signs

803 Road markings

804 Hectometre/Kilometre stones

805 Road delineators

806 Boundary stones

807 Fencing

808 Tubular steel railing

809 Concrete crash barrier


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810 Metal beam crash barrier/ Box beam barrier

811 Road traffic signals

812 R.C. guard post

Section 900 Quality Control for Road Works

901 General

902 Control of alignment level and surface regularity

903 Quality control tests during construction

Section 1000 Materials for Structures

1001 General

1002 Sources of materials

1003 Bricks

1004 Stones

1005 Cast iron

1006 Cement

1007 Coarse aggregates

1008 Sand/fine aggregates

1009 Steel

1010 Water

1011 Timber

1012

Concrete admixtures

1013 Reinforced concrete pipes

1014 Storage of materials

1015 Tests and standard of acceptance

Section 1100 Pile foundations

1101 Description

1102 Sub-surface investigation

1103 Types of piles

1104 Materials

1105 Test piles

1106 Pre-cast concrete piles


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1107 Cast in-situ concrete piles

1108 Steel piles

1109 Timber piles

1110 Driving equipment

1111

Driving1112

Raker (inclined) piles

1113

Pile tests

1114 Pile caps

1115 Bored cast-in-situ piles

1116 Tolerances

1117 Tests and standards of acceptance

1118 Measurements for payment

1119 Rate

Section 1300 Brick Masonry

1304 Cement mortar

Section 1500 Formwork

1501 Description

1502 Materials

1503 Design of formwork

1504

Workmanship

1505 Formed surface and finish

1506 Precautions

1507 Preparation of formwork before concreting

1508 Removal of formwork

1509 Re-use of formwork

1510

Specialized formwork



1513 Rate

Section 1600 - Steel Reinforcement (untensioned)


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1601 Description

1602 General

1603 Protection of the reinforcement

1604 Bending of reinforcement

1605

Placing of reinforcement1606

Bar splices

1607

Testing and acceptance


1609 Rate

Section 1700 - Structural concrete

1701 Description

1702 Materials

1703 Grades of concrete

1704 Proportioning of concrete

1705 Admixtures

1706 Size of coarse aggregates

1707 Equipment

1708 Mixing concrete

1709 Transporting, placing and compaction of concrete

1710 Construction joints

1711 Concreting under water

1712

Adverse weather conditions

1713 Protection and curing

1714 Finishing

1715 Tolerances



1718

Rate

1719 Application of Loading

1720 Use of Adhesives

1721 Additional reference to IRC: SP-65

Section 1800 Prestressing


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1801 Description

1802 Materials

1803 Testing of Prestressing Steel and Anchorages

1804 Workmanship

1805

Supervision1806

Tensioning Equipment

1807

Post-Tensioning

1808 Grouting of Prestressed Tendons

1809 Pre- Tensioning

1810 Safety Precautions during tensioning

1811 Transportation and storage of units

1812 Tolerances

1813 Tests and standard of acceptance

1814 Measurements for Payment

1815 Rate

1816 IRC : SP-65 2005

Section 1900 Structural Steel

1901 Description

1902 General

1903 Materials

1904 Fabrication

1905

Erection

1906 Painting



1909 Rate

1910 Other incidental bridge facilities

Section 2000 Bearings

2001 Description

2002 General

2003 Steel bearings

2004 Special bearings


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2005 Elastomeric bearings

2006 Pot bearings

2007 Inspection and testing


2009 Measurements for payment2010 Rate

Section 2200 Sub-structure

2201 Description

2202 Materials

2203 General

2204 Pier and abutments

2205 Pier cap and abutment cap

2206 Dirt/ballast wall, return wall and wing wall


2208 Tolerances in concrete elements


2210 Rate


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Section 2300 Concrete superstructure

2301 Description

2302 Material

2303

General2304

Reinforced concrete construction

2305

Prestressed concrete construction

2306 Tolerances


2308 Measurement for payment

2309 Rate

2310 Reference IRC: SP-65 -2005

2311 Construction Requirement for Precast Segmental Superstructure

Section 2400 Surface and sub-surface geotechnical exploration

2401 General

2402 Preliminary investigation

2403 Detailed investigation

2404 Exploration for bridge foundations resting on rock

2405 Boring

2406 Records of borings and trial pits

2407 Method of Sampling

2408

Procedure for taking samples

2409 Protection, handling and labeling of samples

2410 Tests for exploration of shallow foundations of bridges

2411 Test for exploration of deep foundation of bridges

2412 Testing of material for guide bund and high embankment and its foundations


2414

Rate

Section 2500 - River Training Works

2504 Pitching / revetment on slopes


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Section 2600 - Expansion joints

2601 Description

2602

General2603

Requirements

2606

Elastomeric slab seal expansion joint

2607 Strip seal expansion joint



2610 Rate

Section 2700 Wearing coat and Appurtenances

2701 Description

2702 Wearing coat

2703 Railings

2704 Approach slab

2705 Drainage spouts

2706 Weep holes



2709 Rate

Section 2900 - Pipe culverts

2901 Scope

2902 Materials

2903 Excavation for pipe

2904 Bedding for pipe

2905 Laying of pipe

2906 Jointing

2907 Backfilling

2908 Headwall and other ancillary works

2909 Opening to traffic



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2911 Rate

Section 3500 Protection and Necessary Diversions of Existing Dry Utilities

3501 Scope3502 Measurement for payment

Section 3800 Painting of bridge, Culvert, Post, Railing etc.

3801 Painting of post, wheel guards, railing etc.

3802 Painting of bridge and culvert


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Preamble

The work of Construction of R.C.C Bridge over River Kalnagini Branch Canal near

Nrisingha Ashram of Swami Vivekananda & Sri Ramkrishna Gram Panchayat under

Kakdwip Block in the district of South 24 Paraganas, West Bengal is to be

constructed to the Specifications for Road and Bridge Works, Fourth Revision, Reprint of March

2006 (MOSRT&H specifications) as supplemented by this Volume wherein some of the clauses

of the MOSRT&H specification have been amended, modified, supplemented, substituted,

deleted and where necessary new clauses added, in order to be better applicable to the

Works. Therefore the MOSRT&H specifications, jointly read with this Volume, will

govern the Works.

In case there is contradiction between the provisions of MOSRT&H specifications and those

detailed in this Volume, the latter shall prevail.

The Clause numbers in MOSRT&H specifications have been followed in this Technical

Specification and amendments, additions, deletions and other changes have been indicated by

referring to the particular clause. Where new clauses have been added, new numbers have

been given to Clauses or Sections. Where no amendment or change is mentioned, the original

Clauses in MOSRT&H specification shall prevail.

Where several types of construction or materials are specified in the MOSRT&H Specification,

the Contractor shall refer to this Technical Specification and/or the other Contract Documents

in applying the definitive types used for the Works.

The contractors shall quote their contract price at item rate basis based on the rates of

different items provided in the priced Bill of Quantities for whole cost of complying with

provisions of contract comprising Instruction to Bidders, the General Conditions of Contract,

the Technical Specifications and other related tender documents.

The Contractors price is deemed to cover all the provisions under the clauses mentioned

hereinafter. Other than what is included in item rate quoted price and BOQ item for running

bills no other measurement of payment shall be done and shall be deemed to be incidental to

the main works and no separate payment will be made for these provisions beyond the

Contract price.


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SECTION 100 GENERAL

101 Introduction

This Clause shall remain unchanged as in MOSRT&H specification.

102 Definitions

Wherever the word drawing appears in this volume, it will mean General Arrangement Drawing

and further detailed drawings for permanent works to be furnished by SIDCL.

The following shall be added after at the end of the first paragraph:

The associated definitions of contractual terms are given in Clause 1.1 of the General

Conditions of Contract (Section 4 of Volume I of these Contract Documents).

103 Materials and Test Standards

The following shall be added after at the end of the first paragraph,-

Appendix 1 of the MOSRT&H Specification gives the Indian and other standards referred to in

the text of the specifications. Additional standards and testing procedures, as required, are

specified in appropriate places in this Technical Specification.

103.1 Substitution of foreign standards by Indian equivalent

All products materials supplied by the Contractor shall conform to the Specification and shall

be approved by the Engineer. Where specific manufacturers or brand names are mentioned in

the Contract Documents, it shall be deemed that that product or similar approved is required.

It shall not be deemed to indicate that the particular manufacturer is mandatory.

Where any materials or equipment are specified, as being in accordance with non-Indian

Standards it should be understood that these are automatically be substituted by such

equivalent to IS or I.R.C. In case application of IS or I.R.C is found unsuitable from a technical

point of view, the Employer will take appropriate measures based on the recommendation of

the Engineer.


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103.2 Applicable edition of Standards

In the Specification materials or tests specified as being in accordance with IS or I.R.C.,

AASHTO or ASTM shall refer to the specifications or method of test prevailing till 28 days prior

to the final date for the submission of Tenders, unless otherwise stated.

104 Sieve Designations

This shall remain unchanged as in MOSRT&H specification.

105 Scope of Work

105.1 This shall remain unchanged as in MOSRT&H specification upto sub cl. 105.4.The

following shall be added after sub cl. 105.4

105.5 Composition of Works

The scope of work shall generally comprise of but not necessarily be limited to the following:

(a) Construction of the Permanent Works, e.g. R.C.C prestressd bridge resting on piles and

pile caps, piers, crossheads, Solid R.C.C. Wall type Abutment, Precast segmental Box

girder, to the lines and levels as specified in the Drawings and Specification.

(b) Design, provision and subsequent removal of all Temporary Works, staging/scaffolding,

Casting bed, shuttering and Ancillary work required for the construction of the Permanent

Works.

(c) Design and provision of any ground treatment required for the construction of

foundations and pipe culverts in poor soil strata where required.

(d) Keeping the Site secure and maintaining of access to and from the Site, in order for the

Works to be carried out in accordance with the Contract

(e) Provision and delivery of all materials, Contractor's Equipment and manpower required to

construct the Works

(f) Removal and disposal at a suitable tip of arising from all construction activities. The

transport provided shall be suitable for the nature of the arising and shall not leak or

discharge any of its contents during transportation or during transfer from one means of

transport to another.

(g) Temporary and permanent reinstatement of roads and footpaths in accordance with


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Drawings and Specification and the requirements at site.

(h) Maintaining all times of a safe traffic movement around the Site in accordance with the

Relevant Authorities.

(i) Preparation of bar bending schedules for all reinforced concrete structures and all

construction drawings including shop drawings for all structural steel work, ConstructionMethodology/ Method statement for Precast Segmental work, Construction methodology

/ Method statement for erection of precast Box segments including casting, curing

stressing etc. The Contractor shall be responsible for checking the accuracy of bending

dimensions shown on all bending schedules. These schedules are to be submitted to the

Engineer for his approval.

(j) Preparation of as-built drawings for the completed Works. These shall be submitted to

the Engineer for his review and approval.

105.6 Exclusions from the Contractor's Works

The following works and services shall be excluded from the Contractor's scope of work:

(a) Provision of right-of-way

(b) Provision of initial base points/line(s) and bench mark(s) to be referred to for the

contractor's setting out

106 Construction Equipment


107 Contract Drawings



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108 Site information

108.1 Site Conditions

The following shall be added to Clause 108.1The requirements of the Conditions of Contract Clause 11 and 12 shall take precedence.

108.4 Quarry Charts

Clause 108.4 of the MOSRT&H Specification shall be deleted and the following substituted in

its place:

No quarry information is provided under the contract. The Contractor is expected to make his

own arrangements for the availability of all construction material and, rates shall be deemed to

include any associated transportation and all other charges.

109 Setting out

109.1 Bench Marks

Add the words subject to a minimum two in a project (work location) after the words four

per km in the sixth line.

The following shall be added after the Clause 109.1:

Except where otherwise specified, all levels shall be in metres expressed to three places of

decimals. All levels on Site shall be determined from the temporary benchmark provided at site

with an arbitrary level of 100.000.

This is to be linked with nearest reference bench marks of PW (Roads) or PWD.(Govt. of W.B)

109.3 Manner of Setting Out


its place:-

The Works shall be accurately set out and referenced to the satisfaction of the Engineer.

Marking systems shall require the prior approval of the Engineer and full records of setting out

and reference points shall be reported to the Engineer in formats to his approval. All setting

out markings and reference points shall be maintained until their removal is approved by the

Engineer.

109.9 Precision of Instrumentation


its place:-

The precision of surveying and measuring instrumentation shall be to the satisfaction of the

Engineer.


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The following shall be added after clause 109.9:-

109.10 Surveying Equipment for the Engineer's Use

The Contractor shall furnish the Engineer for his exclusive use the following instruments,

appliances, surveyor personnel and labour, and materials for the Engineer use in connection

with the Works:(a) 1 Surveyor and 2 Surveying assistants

(b) One set of Surveying equipment as listed below or equivalent, as will be approved by the

Engineer. The equipment will be used by crew of 1 Surveyor and 2 surveying Assistants.

Main Equipment:

Total Station (Make: Nikon or Sokkia or Leica or Trimble) with following minimum

specifications:

Minimum display (least count) : 1second

Angle measuring Accuracy : 2 seconds

Distance Accuracy : + 2mm + 2ppm x D

1 MB SRAM

16 MB compact Flash Card

Maximum distance measurement with single prism: 2.7km

Auto Level of make and accuracy to be approved by the Engineer

Accessories: Generally, these shall be of same make of the main equipment

Wooden Tripod

Program Card

Card reader/Writer

Triple prism set

Prism Pole Tripod

Telescope Prism Pole Set

2 steel measuring tapes 50m long

2 steel measuring rods (4m)

2 nos Leveling Staff

Survey stakes as required and

Miscellaneous tools and consumables as required in surveying.

All surveying instruments shall be supplied complete including tripods, staffs etc.

109.11 Maintenance

Such survey equipment shall be calibrated prior to use and periodically, and be repaired or

replaced by the Contractor as required by the Engineer.


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109.12 Ownership

The surveying equipment will be treated as the property of the Employer during the period of

contract including extension period and will be returned to the Contractor on as is where is

basis within thirty days (30) of the issuance of the Taking Over Certificate.

109.13 Measurement for Payment

The supply of surveying equipment and its maintenance and shall be measured for payment as

follows:

(1) no separate payment for provision of the equipment, including the demonstration,

(2) by time related monthly items for the maintenance of the equipment including the

demonstration.

(The monthly payment should cover activity under item 1 above and item 3 hereunder)

(3) no separate payment for removal of equipment,

(4) by time related monthly items for supply of 1 Surveyor and 2 surveying assistants as a

group to work with the equipments.

109.14 Rates

The Contract rates for time related monthly payment shall include all aspects of the

procurement, delivery, maintenance and removal of the surveying equipment for the

Engineers exclusive use. In other words, the scope is similar to monthly hire charges for the

equipment in working condition. Prorate rate shall be applicable if the equipment is not fit for

use for more than 3 calendar days in a particular month. Rate for Surveyors and surveying

Assistants shall be per shift per month, in units of 1 Surveyor and 2 survey Assistants.


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110 Public utilities

Sub Clause 110.1 of the MOSRT&H Specification is deleted entirely and the following

substituted:

Channelizing the request through SIDCL, the Contractor shall have to collect the information

from the concerned authority(ies) and/or make one trial trenches at 150 metre interval or

closer to confirm the exact location of utilities at site. Drawing scheduling the affected

services like water pipes, sewers, cables, gas ducts etc. owned by various authorities

including Public Undertakings and Local Authorities shall be prepared by the contractor and

verified by the contractor for accuracy of the information prior to the commencement of any

work close to those services. SIDCL will arrange for their shifting through the owning agencies.

The Contractor shall be asked to render all assistance during the execution of the utility work,

by suitably programming their main work at no extra cost to SIDCL and shall be treated as

incidental to the work.

The Contractor is therefore required to provide drawings showing the exact routes of all the

dry utilities, and underground installation, as located by trial trenches and survey. The above

incidental works shall have to be carried by the Contractor at his own cost.

Sub Clauses 110.2 to 110.7 are unaltered from the MOSRT&H Specification.

111 Precautions for Safeguarding the Environment

This shall remain unchanged as in MOSRT&H specification

112 Arrangements for Traffic during Construction

Clause 112 of the MOSRT&H Specification is deleted entirely and the following substituted:

112.1 General

The Contractor shall carry out the Works in a manner creating least interference to the safe

flow of traffic consistent with the execution of the Contract.

The Contractors project planning shall include a traffic control plan for moving traffic through

and around the construction zone in a manner that is conducive to the safety of the travelling

public, pedestrians and workers.


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The traffic control plan shall include such items as , methods and devices for delineation and

channelisation, signaling signing, application and removal of pavement markings, placement of

devices; working area lighting, surveillance and inspection.

The Contractor shall submit the Program for approval of the Engineer of the works associated

with the sub-projects (Project Sections) which shall, in principle, be carried out in stages andsub stages covering various components of the works.

The Contractor shall take prior approval of the Engineer, traffic police and other concerned

authorities regarding traffic arrangement during construction.

No two sequences of work will be taken simultaneously without the prior approval of the

Engineer.

The Contractor shall make the road or footpath available for public use after the completion of

one section of work if blocked temporarily.

The Contractor shall obtain the specific prior permission from traffic police and other

concerned authorities for the transportation of all plant and material to and from the site,

particularly on the public highway.

The Contractor shall maintain two lanes available for traffic in each direction at all times except

when a temporary reduction is approved by the Engineer and granted specific prior permission

from traffic police and other concerned authorities. The existing drainages should not be

affected by contractor's work.

The minimum permissible traffic route widths shall be as follows:

1 lane - 3.5m

2 lane - 6.5m

3 lane - 9.9m

Further temporary reduction shall be allowed subject to the prior approval of the Engineer, the

traffic police and other concerned authorities.

Minimum 1.5m width of footpath of approved hard surfacing shall be kept free during

construction period as a temporary measure, if they are allowed to occupy existing footpath

space for any reason whatsoever for construction activities.

112.2 Passage of Traffic along a part of the Existing Carriageway under

improvement

Shall remain same

112.3 Passage of traffic along a temporary diversion

Shall remain same


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112. 5 Maintenance of Diversion and Traffic Control Devices

Signs, lights, barriers and other traffic control devices of diversion roads shall be maintained in

a satisfactory condition till such time as they are required as directed by the Engineer. The

temporary traveled way shall be kept free of dust by frequent applications of water, if

necessary.

112. 6 Measurements for Payment and Rate

Shall remain same

113 General rules for the measurement of works for payment

Clause 113 from the MOSRT&H Specification shall be deleted entirely and the following

substituted in its place:-

113.1 Method of Measurement

All measurements for payment in the Bill of Quantities shall be made net based on the

Drawings, or the actual work done approved by the Engineer. The contractors quoted price

shall include this cost in the Item rate cost. The Bill of Quantities are for monthly/ periodical on

account payments only and this cost will merge in the final amount. Detailed measurements

are to be furnished by contractor to compare with as built drawings.

114 Scope of rates for different items of work


115 Methodology and sequence of work.

This shall remain unchanged as in MOSRT&H specification. The requirements of the Conditions

of Contract shall take precedence.

116 Crushed stone aggregates


117 Approval of materials


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118 Supply of quarry samples.


119 Use of surface by construction traffic.


120 Site office for Engineer and other supervisory staff.

The sub-section is deleted entirely and the following is substituted:

120.1 A temporary site office of 500 (five hundred) sqft carpet area with facility of toilet,

electricity, water, reasonable furniture for the engineer and his representative,

computer operator and other facilities as will be directed by the Engineer shall be

handed over to the Engineer within 30 days after issue of work order for their use.

They shall remain the property of the contractor and shall be returned to the

contractor within thirty (30) days after issuing taking over certificate for the whole

work.

120.2 Payment will be made on the basis of B.O.Q. provision under preliminary subhead.

121 Field laboratory


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121.1 Scope

This shall remain unchanged as in MOSRT&H specification

121.2

Description

Clause 121.2 of MOSRT&H Specifications shall be deleted entirely and the following

paragraphs substituted in its place:

The area for the erection of the field laboratory will not be provided by the Employer, and the

provision of such area shall be the responsibility of the Contractor. The field laboratory shall be

for the exclusive use of this project and should not be shared with any other work even under

another Government agency.

The field laboratory shall preferably be located adjacent to the site and shall be provided with

amenities like water supply, electric supply etc. as well as laboratory tables, cupboards, chairs,

tables and other furniture as necessary.

The floor space of the field laboratory shall be decided by the Contractor, subject to the

approval of the Engineer. Office space shall be provided within the field laboratory for the use

of the Engineer's Materials Engineer.

The laboratory will be operated by the Contractor under the supervision of the Engineer.

All other apparatus and materials necessary for tests required under the Contract shall be

supplied by the Contractor and installed in the laboratory. Not later than 30 days after the

receipt of the Letter of Acceptance, the Contractor shall submit for the Engineer's approval, a

list of all equipment to be procured and details of suppliers.

All equipment used for testing shall be of standard type and approved by the Engineer and

properly housed by the Contractor. An adequate supply of water and electric power shall be

provided at all time.

Every designation of the Indian Standards or other foreign standard specifications shall refer to

the versions of those specifications current 28 days prior to the final date for the submission of

Tenders, except where otherwise stated.


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In any case where material or workmanship is specified by one of the above tests, and

alternative test methods are allowed, the method used to determine compliance with the

Specification will be at the absolute discretion of the Engineer.

The Contractor shall provide laboratories fully equipped and furnished at locations approved bythe Engineer in order that the Engineer can control and supervise the material used for (i)

concrete batching and / or (ii) bituminous pavements and operations of bituminous mixing

plants. Only such laboratories can be at a remote place close to the plants at a remote area

from pollution point of view.

121.3 Laboratory equipment

Clause 121.3 of the MOSRT&H Specification shall be deleted entirely and the following

substituted in its place;-

All necessary laboratory equipment shall be provided, maintained and operated by the

Contractor for the sampling, transporting, storing, curing, preparation of samples and testing

of all materials required for the Works.

All laboratory equipment shall be to the approval of the Engineer.

121.4 Ownership


substituted in its place:

The area for the erection of the laboratories will not be provided by the Employer, and the

provision of such area shall be the responsibility of the Contractor. However where there is

available space the Employer may give permission for the laboratories office to be erected

within Such areas, at payment of ground rent, at rate to be decided by the employer.

The laboratories and equipment as detailed in Sub-clause 121 above shall be provided by the

Contractor for the use of the Employer and/or Engineer. They shall remain the property of the

Contractor and shall be returned to the Contractor within thirty (30) days after issuing the

Taking-Over Certificate.


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121.5 Maintenance


substituted in its place; -

The Contractor shall be responsible for all aspects of maintenance and operation of the

laboratories, including all costs associated with purchase, delivery erection calibration of

equipment, operation, including sampling, storage, curing and testing of materials, periodic re-

calibration of equipment, supply of consumables, recording and submitting test results to the

Engineer, and removal on completion of the Works.

121.6 Measurements for Payment.

This Sub-Clause is deleted entirely and the following substituted:

The supply of laboratories together with equipment and furniture, their operation, removal

after completion of works and their maintenance and charges for utilities shall be measured for

payment on the principle of hire charges as follows:

By time related monthly items for (1) supply and maintenance of Field Laboratory and

equipment including final removal of Field Laboratory and equipment.

121.7 Rates

Payment will be made on the basis of B.O.Q. provision under preliminary subhead.

Clause 122 Site Residential Accommodation for Engineer and Other

Supervisory Staff

DELETED

Clause 123 Providing and maintaining Telecommunication System

123.1 Scope

The works shall cover the provision of three sets of mobile phones for the exclusive use of the


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Engineer or his Representatives as also maintenance and payment of call charges per month.

123.2

Provision and Ownership

The Contractor shall arrange to provide three sets of mobile phones for a period of 25 months

with one battery, one spare battery and one battery charger per phone for the exclusive use of

Engineer or his Representative and connection to a telephone network (BSNL or Similar). The

mobile phones will remain the property of the Employer and shall be retained by the Engineer

upon the completion of the contract.

123.3 Approval

The Nokia make or equivalent model of the phone and selection of the network and tariff to beused shall require the prior approval of the Engineer. International and long distance dialing

facilities will not be provided.

123.4 Maintenance

The Contractor shall maintain the phones and carry out repair including provision of

replacement of batteries, chargers or the telephone instrument itself if it cannot be repaired to

provide uninterrupted service.


Payment for the provision of mobile phones shall be by a unit rate per unit provided. Each unit

shall be procured by initial outright purchase rather than obtained on a lease or similar basis.

Phones procured by purchase at prices subsidized by subsequent line rental and call charge

tariffs will not be acceptable. Each unit shall include the cost of provision of the phone, any

initial lump sum connection fees or related initial charges and deposits. International dialing

facilities shall not be required or provided. The phones provided shall have the facility to be

restricted to local calls only.


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123.6 Rates

The Contract unit rate shall include for the supply of mobile phones and shall be deemed to

include all initial charges associated with the outright purchase of the phone, SIM card,

battery, spare battery, battery charger, suitable protective case, security deposit and anyother items so that the phone is provided to the Engineer in an operating condition.

The telephone monthly rental and call charges, voice mail etc. will also be included in the rate

quoted by the Contractor. Payment in this regard will be made as per rate quoted in the BOQ.

124 Providing and Maintaining Project Vehicle

This Clause is unaltered from MOSRT&H Specification with following modification.

Make of Car- Ambassador or similar (Hard top Jeep, Maruti Gypsy or Mahindra and Mahindra

Jeep is not acceptable).

Type of Car - Euro 3 Diesel Car (Petrol Car will not be accepted).


This sub- clause is deleted and substituted by the following:

The payment for providing and maintaining vehicles shall be on vehicle month basis. The

rate of vehicle- month given in the BOQ shall be proportionately reduced for number of days

in a month the contractor fails to place the vehicle to the Engineer or the Engineers

representatives and/ or for the period of withdrawal as per sub-clause 124.4 irrespective of the

fact whethervehicle was available or not.

125 Supply of Colour Record Photographs and Albums

Deleted

126 Supply of Video Cassettes

Deleted

127 Provision of Copies of Indian Standards etc.

Deleted


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128 Tolerance

All Works executed under the Contract shall be carried out in accordance with the tolerances

given in the Specification and approved Drawings, and such other tolerances as are givenelsewhere.

129 Temporary Buildings and Site Services

129.1 Maintenance of the Contractor's temporary site buildings

The Contractor shall not erect any structure permanent or temporary for any sort of use

without the prior permission of the Engineer.

The Contractor shall provide and maintain all necessary temporary buildings, ablutions, water

closets, sheds, stores and storage areas, move as required during the construction of the

Works, and remove the same from the Site on completion of the Works. No structure shall be

erected or storage area laid out by the Contractor within the Site without the Engineer's

consent, but such consent will not relieve the Contractor from his responsibility of siting

temporary structures clear of the Works, utility access points and the like. A copy of the plan

showing the extent and position of all offices, ablutions, water closets, sheds, stores and

storage areas shall be given to the Engineer. Temporary buildings, ablutions, water closets,

sheds, stores and storage areas shall be cleaned and maintained on a daily basis, to the

satisfaction of the Engineer.

129.2 Provision of Latrines

The Contractor shall provide efficient and sanitary latrine accommodation (at location

permitted by the Engineer) for the use of the employees on the Works and shall keep the

whole of the Site and the latrines in a clean and sanitary condition to the satisfaction of the

Engineer.

129.3 Site Services

The Contractor shall be responsible for providing at his own cost all Site services including for

the Engineer's use as necessary and appropriate for the construction of the Works, which shall


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include, but not necessarily be limited to:

(a) electricity

(b) water

(c) site communication facilities, and

(d) temporary drainage and sewage disposal.

Such services shall be provided by the Contractor for use solely in connection with the proper

execution of the Works. The Contractor shall be responsible for complying with all regulations

of the Relevant Authorities concerned. The Contractor shall be responsible for the provision

and maintenance of all installations associated with such services and the relation thereto and

shall take all reasonable precautions to safeguard the safety and health of all persons and the

security of the Site. The Engineer may demand the immediate disconnection or alteration of

such installations or portions thereof as he considers to be prejudicial to safety, health or

security. As soon as any or all of the Contractor's installations are no longer required for the

execution of the Works they shall be entirely removed to the satisfaction of the Engineer.

All installations shall comply fully with all appropriate statutory requirements. Pipes, tubes,

ducts or cables crossing roads, footpaths, or right-of-way shall be ramped over, or recessed

below the surface. Specific services shall comply with the following:

129.4 Electricity

The Contractor shall provide all necessary artificial lighting for use on the Works at night,

closed underground work and wherever required.

The Contractor shall provide all temporary cables, mains, sub-mains, wirings, fittings, etc. for

the above, clear away and make good on completion and pay all fees and charges.

129.5 Water

An adequate supply of fresh water shall be provided at the Site, including provision to the

satisfaction of the Relevant Authority of any storage tanks so that sufficient fresh water is

always available for the execution of the works including during any periods of water

restriction. A supply of safe drinking water shall be provided by the Contractor for his own

work people and the Engineer.


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129.6 Temporary Drainage and Sewage Disposal

Adequate provision shall be made for the discharge or disposal from the Site of all water,

surplus fluid, sewage and waste products and the method of disposal shall be to the approvalof the Engineer and in accordance with the regulations of the Relevant Authorities. The Site

shall be kept well drained and free from standing water. Where existing channels and gullies

cannot be maintained, temporary drainage arrangements shall be provided at the Contractor's

cost.

129.7 Measurement and Payment

Contractors quoted rates are deemed to cover all the provisions under clause 129 which are

incidental to the work and no separate payment will be made for these provisions.

130 Hoardings and Fencing

This clause shall remain unchanged as in MOSRT&H specification.

131 Project Information Signboards


132 Reports and Documentation


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132.1 Initial Plans etc.

The Contractor shall, within fifteen (15) days from receipt of the Letter of Acceptance, submit

to the Engineer the following documents, data and/or schedules but not be limited to, for the

Engineer's approval:

(a) Execution plan covering organization chart, resume of all key personnel, mobilization of

supervising force and other indirect staff, labor, construction equipment/vehicles,

material procurement/purchasing plan, temporary work plan, overall construction

programme, quality assurance plan, safety plan, subcontract plan, work sequence plan,

etc.

(b) Inspection and testing plan

(c) Working drawings, and detail information on equipment

Field laboratories

(d) Cash flow schedule

(e) Other document and information designated by the Engineer at issuing the Letter of

Acceptance

132.2 Regular Reports to the Engineer

In addition to the reports and documentation specified in the Contract other than this Clause,

the Contractor shall submit to the Engineer the following regularly:

(a) Advance monthly construction programmes

(b)

Advance weekly construction programmes

(c) Advance method statement

(d) Submission of the line diagram along with the monthly bill showing the exact progress of

the executed work for which the bill has been drawn.

(e) Inspection applications and reports

(f) Accident reports

132.3 Regular Reviews

Progress review meeting shall be held every week. In addition once each month during the

progress of the Works or at such other intervals as may be required by the Engineer, the

program is to be reviewed and updated by the Contractor taking into account the latest

available information on activities completed, in progress and not yet started, which


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information shall be agreed with the Engineer.

Three (3) copies of the program arising from the review shall be submitted to the Engineer

indicating the state of progress of the Works and the revisions necessary to achieve

completion thereof and of individual Sections thereof by the dates specified and to achievecompletion of the whole of the Works by the required date.

The monthly review shall also include, but not necessarily be limited to the provision by the

Contractor of the following:

(a) Description of the previous month's activities and progress

(b) Discussion on critical activities and program with particular reference to action taken or

which will be taken to rectify any program slippage

(c) Any significant movement in labor numbers 01- equipment mobilization / demobilization

(d) Photographic record of the construction site, in sufficient detail to show the progress of

the major aspects of the Works

(e) Project financial report including reconciliation of variations, claims and estimates of

future claims

(f) Project safety report

The Contractor shall submit to the Engineer a daily return of Labour and Contractor's

Equipment, i.e., the statement of the Contractor's Equipment, labour (by discipline) and staff

on Site, major material items received, problems to be solved and as desired by the Engineer.


The cost for these items of work shall be deemed to be included in the Contractor's unit rates.

No separate payment shall be made for these provisions.


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SECTION 200 SITE CLEARANCE

201 Clearing and Grubbing

201.1 Scope

Add the following paragraph to the MOSRT&H Specification.

If any vegetation grows after clearing and grubbing before road construction work, the

contractor shall repeat the work to the satisfaction of the Engineer without any extra cost. The

scope of clearing and grubbing shall include all clearance of street furniture, utility apparatus

etc. necessitated by the Works not specifically measured elsewhere.

201.2 Preservation of Property / Amenities

Add the following paragraph to the MOSRT&H Specification.

The Engineer will establish the limits of work and designate all trees, shrubs, plants and other

things to remain. The Contractor shall preserve all items designated to remain.

201.3 Methods, Tools and Equipments


201.4 Disposal of Materials


substituted:-

All surplus materials arising from the Works (except those arising from private properties) shall

be the property of the Contractor who shall be responsible for their disposal.


Payment will be made on area basis in hectare regarding site clearance. Cutting of trees upto

300mm in including removal of stumps and roots, and trimming of branches of trees extending

above the roadways shall be considered incidental to the cleaning and grubbing operations,

Removal of stumps left over after trees have been cut by any other agency shall also be

considered incidental to the cleaning and grubbing operations.


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Cutting in including removal of stumps and roots of trees of girth above 300mm and backfilling

to required compaction shall be measured in terms of number according to the sizes given

below:-

Above 300mm to 600mm

Above 600mm to 900mmAbove 900mm to 1800mm

Above 1800mm

For the purpose, the girth shall be measured at a height of 1 meter above the ground or at the

stump if the height of the stump is less than one meter from the ground.

201.6 Rates

The unit price for the work hereof will be deemed to include any precautions or special

working methods necessary to avoid damage to adjacent items designated to remain. Any

such damage shall be rectified by the contractor at his own cost.

The Contract unit rate for the work shall be, payment in full for all labour, material, tools,

equipment and incidental charges necessary to complete the work.

201.7 Clearance of Sludges from the Manholes / Gully pits

All the sludges from the Manhole / Gully pits within the limit of works shall have to be cleared

as per direction of the engineer.


No separate payment will be made.

202 Dismantling Culverts, Bridges and Other Structures / Pavements

Sub-Clauses 202.1 and 202.2 of the MOSRT&H Specifications are unaltered.

202.3 Dismantling Pavements and Other Structures

Add the following sub-paragraph in between the two sub-paragraphs of Sub-Clause 202.3 of


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the MOSRT&H Specification.

For careful scarifying of bituminous layers to specified level and grade, refer to Sub-Clause

501.8.3.2.

Add the following at the end of Sub-Clause 202.3 of the MOSRT&H Specification.

The dismantling operations shall have to be conducted carefully, so as not to damage thematerials which are scheduled to be or may be reused with or without further treatment.

202.5 Disposal of Materials

Sub-Clause 202.5 of the MOSRT&H Specification is deleted and the following substituted:

Unless specifically stated otherwise within the Contract Documents, all surplus materials arising

from the Works (except those arising from private properties) shall be the property of the

Contractor. The disposal of all surplus materials arising from the Works shall be the

responsibility of the Contractor. The Contractor shall be deemed to have allowed in his rates

for all cost associated with such disposal and any salvage value of any materials. Materials

indicated within the Contract Documents as required for reuse shall be the property of the

Employer.

202.6 Measurements for Payment

Delete the Sub-Clause 202.6 of MOSRT&H Specification entirely and substitute the following:

Dismantling required for the Permanent Works will be measured for payment, while

dismantling for haul roads, borrow areas and all the Temporary Works will not be measured

for payment. The work of dismantling structures shall be paid for in units indicated below, by

taking measurements before and after as applicable:


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Work Item Unit of

Measurement

Brick/Stone masonry/concrete (plain and

reinforced)

cu.m

Gullies No.

Flexible and cement concrete pavements cu.m

Road Pavement cu.m

Footpath cu.m

Steel structures tonne

Timber structures cu.m

Pipes, guard rails, kerbs, gutters and

fencing

lin m

Pedestrian Barrier lin m

Kerbs lin m

Channel Blocks lin m

Garden / Median Fencing lin.m

202.7

Rates

The words within all lifts and upto a lead of 1000m shall be deleted from Sub-Clause 202.7

of the MOSRT&H Specification.

The following Clauses are added to the MOSRT&H Specification Section 200

203 Other Site Clearance Matters

203.1 Treatment of areas for Roadway Embankment

In areas under roadway embankments, from which top soil or unsuitable materials are to be

removed or which are designated to be compacted, all stumps and roots shall be removed to a

depth of at atleast 50 cm below the original ground surface and at least 50 cm below the

bottom of the lowest pavement layer.

203.2 Protection of Areas Designated to Remain


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In areas designated by the Engineer, the Contractor shall be responsible for the protection and

routine maintenance of existing shrubs, trees and grassed areas. On completion of the Works

these areas shall be returned to the Employer in the same condition as before and any

damage due directly or indirectly to the Contractor's operations shall be made good at his owncost The Contractor may take photos for his recording of the original condition at the time of

work commencement.

203.3 Maintenance of Flows in Culverts to be demolished.

Where the Works include the diversion of existing culverts and subsequent demolition of the

existing sewers and similar services, demolition of such existing services shall not commence

until authorised by the Engineer. Such authorization will be dependant upon availability of the

alternative diversion where appropriate.

203.4 Maintenance of Traffic Flow - Alternative Traffic Routes

No road, bridge, tram track or other structure in use by traffic shall be removed until

authorised by the Engineer. Such authorization will be dependant upon satisfactory alternative

arrangements have been made to accommodate traffic where appropriate.

203.5 Materials for Reuse

Existing kerbs, channels, street furniture and other materials designated for dismantling and

reuse by the contractor in his offer, shall be carefully removed and stockpiled for re-use in the

Works, or shall be disposed of, as directed by the Engineer.

Dismantling of existing items shall be undertaken in such a manner as to avoid damage to

existing pavements and kerbs which are designated to remain.


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203.6 Measurement & Payment

Reuse of material except kerbs shall not to be measured and paid and is deemed to be

included in contract price.


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SECTION 300 Earthwork, Erosion control and Drainage

Clause 301 Excavation for Roadway and Drains

301.1

Scope

The following shall be added at the end of Clause 301.1:

The scope of this clause does not include excavation of trenches for utilities and excavation for

surface water drainage works, which are governed by Clause 3200 later in this volume.

301.2 Classification of Excavated Material

301.2.2 Authority for classification

The existing clause shall be deleted and following substituted in its place:

The Engineer shall be the sole authority for the classification of the soil in excavation and his

decision shall be final and binding on the Contractor. Soil classification will not be decided on

the basis of the means adopted i.e. use of explosives or hydraulic or pneumatic breakers in

excavation, but by the Engineer who may authorize such use.

301.3 Construction Operations

301.3.1Setting out

Delete the 2nd sentence of this MOSRT&H Sub-Clause beginning and ending with The

Contractor shall. establishment of bench marksand substitute with the following:-

The contractor shall set out the works and shall establish bench marks from the initial control

points supplied by the Engineer.

Sub-Clause 301.3.2 is unaltered from the MOSRT&H Specification.


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301.3.3 Excavation-General

The following shall be added at the end of the third paragraph of this clause:

Temporary shoring shall be provided by the Contractor to the sides of the excavation wherevernecessary to support the foundations of adjoining structures and road pavement and to

prevent any ground movement. Where temporary supports are required they shall be

designed, provided and removed such that no ground movement occurs on removal.

The Contractor shall submit his proposals for support of excavations to the Engineer for

approval prior to commencement of excavation.

301.3.5 Rock Excavation - Rock

DELETED

301.3.6Marshy Excavation


301.3.11 Disposal of Excavated Materials

The first paragraph shall be deleted and the following substituted:

All materials arising from excavations required for reuse in the Works shall be the property of

the Employer. No material shall be removed from Site without the permission of the Engineer.

However, all surplus excavated materials shall be the property of the Contractor The material

obtained from the excavation of roadway, shoulders, verges, drains, cross-drainage works etc,

shall be used for filling up of (i) roadway embankment, (ii) the existing pits in the right-of-way

and (iii) for landscaping of the road as directed by the Engineer, including leveling and

spreading with all lifts and leads and no extra payment shall be made for the same.

Where suitable for reuse, existing granular base and sub-base materials removed as part of

the works shall be removed carefully and stockpiled and tested for re-use as granular sub-base

or otherwise as directed by the Engineer.


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Delete the words upto 1000mfrom 3rdline of 2ndparagraph of this Sub-Clause.

Delete the 3rdparagraph of this Sub-Clause and substitute the following:

Unsuitable and surplus material not intended for use in Works shall be transported with all lifts

and leads to dispose of as directed by the Engineer.

301.3.12

Backfilling


301.6 Preparation of Cut Formation

This clause shall be deleted and the following clauses 301.6.1 to 301.6.3 substituted in its

place:

301.6.1 Preparation of Cut Formation in Soil Excavation

Unsuitable materials found in the sub-grade shall be removed as directed by the Engineer and

suitable fill material replaced, and compacted in accordance with the requirements of Clause

305, to not less than 95 % of the MDD determined by IS: 2720 (Part 8). Material with a high

moisture content shall be considered as unsuitable only on the basis of one or more of the

conditions stipulated in Clause 305.2.1.1 for unsuitable material.

Unsuitable materials shall be disposed of in accordance with Clause 301.3.11.

The bearing capacity of the sub-grade material (i.e. the in-situ material below the underside of

the granular base course) shall be tested in the laboratory in accordance with IS: 2720 (Part

16) at 97 % of the MDD determined in accordance with IS2720 (Part 8) and soaked for four

days. Where the CBR value is less than 10%, the sub-grade shall be strengthened by

constructing a capping layer and sub-base layer as indicated on the Drawings. Where the CBR

value is greater than 10 % but less than 30% the sub-grade shall be strengthened by

constructing sub-base layer as indicated on the Drawings.

Where indicated on the Drawings or directed by the Engineer, the sub-grade in soil

excavations shall be protected by the capping layer immediately after completion of the

preparatory works.


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The cut formation in soil excavation, which serves as a sub-grade, shall be prepared to receive

the capping layer or sub-base immediately after completion of the excavation.

Where a capping layer is to be constructed and the material in the sub-grade that lies within300 mm of the underside of the capping layer has a density less than 95% of the MDD

determined in accordance with IS: 2720 (Part 8), the same shall be loosened and conditioned

to bring the moisture content to within +2 %/ -3 % of the Optimum Moisture Content and

compacted in layers in accordance with the requirements of Clause 305, to not less than 95%

of the MDD determined by IS: 2720 (Part 8).

Where no capping layer is required and the material in the sub-grade that lies within 500 mm

of the underside of the sub-base has a density less than that specified in Table 300-2, the

same shall be loosened and conditioned to bring the moisture content to within +2/-3 of the

Optimum Moisture Content and compacted in layers in accordance with the requirements of

Clause 305, to not less than 97% of the MDD determined by IS: 2720 (Part 8).

If due to any reason (such as for example weather) the moisture content of the sub-grade

material cannot be reduced as specified by aeration and exposure to the sun, compaction of

the sub-grade shall be suspended and the Contractor shall submit alternative measures to the

Engineer for approval.

After satisfying the density requirements, the cut formation shall be prepared to receive the

capping layer or sub-base in accordance with Clause 310 and 311.

The finished cut formation shall comply with the surface tolerances described in Clause 902.


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301.6.2 Preparation of Cut formation in Rock

DELETED

301.6.3 The Capping Layer

Material for the capping layer shall be suitable fill material complying with Clause 305.2 of the

specification with a minimum CBR value of 15 % when tested in accordance with IS: 2720

(Part 16) at 97 % of the MDD determined in accordance with IS: 2720 (Part 8) after soaking

for four days.

The capping layer shall be constructed to the lines and levels shown on the Drawings in

accordance with Clause 305 of the Specification to not less than 97 % of the MDD determined

in accordance with IS: 2720 (Part 8).

The finished formation of the capping layer shall comply with the surface tolerances for sub-

grade described in Clause 902.

301.7 Finishing Operations

Paragraph 3 of this clause shall be deleted.

301.8 Measurements for Payment

This clause shall remain as in MOSRT&H specification, unchanged.

301.9 Rates


The following shall be added after Clause 301.9.1 (vi):

(vii) Working around existing utility appliances

Delete the last sentence of the Sub-Clause 301.9.1, starting and ending with Provided,

however, where.. vide Sub-Clause 303.5.

301.9.2 Loosening and re-compacting


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Clause 301.9.2 shall be deleted and the following substituted in its place:

The Contract unit rate for loosening and re-compacting the loosened materials at sub-grade

shall include full compensation for loosening to the specified depth, including breaking clods,spreading in layers, watering or drying the material as appropriate including removing the

material to stockpile and backfilling where necessary, and compacting to the requirements.

301.9.3

Sub-Clause 301.9.3 is unaltered from the MOSRT&H Specification.

301.9.5

Replace the words but leads upto 1000m in 3rd and 4th lines by all leads.

301.9.6 Unit Rates for Disposal of surplus earth

Clause 301.9.6 shall be deleted and the following substituted in its place:

All surplus materials arising from the Works shall be the property of the Contractor. All material

required for reuse in the Works shall be the property of the Employer. The disposal of surplus

excavated material shall be the responsibility of the Contractor. The Contractor shall be

deemed to have allowed all cost associated with such disposal and any salvage value in the

Contract Rates.

This item of work shall not to be measured and paid separately and is deemed to be included

in the contract price.

Clause 302 Blasting Operations

DELETED

Clause 303 Pre-splitting Rock Excavation Slopes

DELETED


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Clause 304 Excavation for Structures


304.3.2 Excavation

Add "or road pavement" after "an adjoining structure" in the fifth line of the second paragraph.

304.3.4 Preparation of Foundations

The second sentence of the first paragraphs shall be deleted and the following substituted:

Before the footing is constructed all disturbed material shall be fully compacted in accordance

with Table 300.2 and the surface shall be lightly watered, if required, and rammed to compact

the in situ material.

304.3.7 Backfilling

The first paragraph shall be deleted and the following substituted in its place:

Backfilling shall be done with selected granular material after the concrete or masonry is fully

set and carried out in such a way as not to cause undue thrust on any part of the structure. All

space between foundation masonry or concrete and the sides of the excavation shall be filled

to the original surface in layers not exceeding 150 mm compacted thickness. The compaction

shall be done with the help of suitable equipment such as mechanical tamper, rammer,

vibrating plate compactor etc., after necessary watering or drying so as to achieve a density

not less than the field density before excavation or 90 % of the MDD determined by IS: 2720

(Part 8).


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304.4 Measurements for Payments


304.5

Rates


Clause 305 Embankment Construction


305.3.4 Compacting Ground Supporting Embankment / Sub-grade

The first paragraph shall be deleted and the following substituted:

Where necessary, the original ground shall be leveled to facilitate placement of the first layer

of the embankment, scarified, mixed with water or dried as appropriate, and then compacted

by rolling so as to achieve the minimum dry density as given in Table 300-2.

The following shall be added at the end of the second paragraph:

In cases where a capping layer is to be constructed and the difference between the sub-grade

level and ground level is less than 300 mm and the relative compaction of the ground is less

than 95 %of the MDD determined in accordance with IS: 2720 (Part 8) the ground shall be

loosened up to a depth of 300 mm below the underside of the capping layer, scarified, mixed

with water or dried as appropriate, and then compacted to achieve not less than 95% of the

MDD determined in accordance with IS: 2720 (Part 8).

305.7 Sub-grade Strength

A new sub-clause 305.7.3 shall be added:


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305.7.3

Any imported fill material used as part of the preparation of the sub-grade formation shall

have a minimum CBR value of 15 % after soaking for four days.

305.8

Measurements for Payment

The first paragraph shall be deleted and the following substituted in its place:

Earth embankment / sub-grade construction shall be measured separately net from the

drawings by taking cross-sections at suitable intervals of the original surface before the work

starts and computing the volume in cubic metres from cross-sections based upon the original

ground profile and the theoretical finished profile by the method of average end areas.

305.9 Rates

This clause shall remain as in MOSRT&H specification, unchanged

The following shall be added after item (xiii):

(xiv) Working around existing utility appliances.

Clause 306 Soil Erosion and Sedimentation Control

DELETED

Clause 307 Turfing with Sods


.

Clause 308 Seeding and Mulching



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Clause 309 Surface / Sub-Surface Drains


Clause 310 Preparation and Surface Treatment of Formation

The first sentence of the first paragraph shall be deleted and the following substituted:

Preparation of surface treatment of the formation, that is top of the sub-grade or capping

layer, shall be carried out only after completion of any specified sub-grade drainage and unless

otherwise agreed by the Engineer immediately prior to laying the sub-base or the road base

where no sub-base is required.

No separate measurement for the provisions of the same shall be done as it is already

considered in the relevant items.

Clause 311 Works to be kept free of water


No separate measurement for the provisions of the same shall be done as it is already

considered in the relevant items.

Clause 312 Water Courses at Culverts


Clause 313 Construction of Rockfill Embankment

DELETED

The following new Clauses 314 and 315 shall be added to the MOSRT&H Specification:-

Clause 314 Granular Backfill

314.1 Scope


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This item shall consist of furnishing, placing and compaction granular backfill adjacent to

structures. The areas in which this material is to be placed in the "Influence Zone" of certain

structures and this will be shown on the Drawings.

314.2 Material

The material shall be well graded crushed or uncrushed gravel, stone, rock fill or natural sand

or a well mixed combination of any of these. The grading requirements for the material are as

follows-

Maximum particle size 10 cm

Passing 4.75mm sieve 25 to 90

Passing 0.075mm sieve 0 to 10Plasticity index 10 % maximum

314.3 Construction

The granular backfill shall be placed in layers not exceeding 15 cm and compacted in

accordance with Table 300-2.


The quantity of granular backfill to be measured and paid for, will be the number of cubic

metres of suitable material supplied and compacted to the Engineer's satisfaction and in

accordance with this Specification.

The material is required to be placed when filling within the influence zone of certain

structures and any material placed outside the specified zone will not be measured for

payment.

Any existing material within the influence zone, which is removed because of the Contractor's

method of working, must be replaced by granular backfill at Contractor's expense. Where

excavation within the influence zone is instructed under any Clause of these Specifications,

then the backfilling will be carried out with granular backfill and the work will be measured for


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payment under this clause.

314.5 Rates

The accepted quantities of granular backfill, measured as provided above, will be paid for atthe Contract unit price for the pay item as below. The price and payment will be full

compensation for the work described in this Clause, including furnishing, hauling, placing and

compacting the material.

Work Item Unit of Measurement

Granular backfill:

a) Silver sand

b)

Coarse sand

Cubic metre

Cubic metre

Clause 315 Permeable Backfill

DELETED

315.1 Scope

This work shall consist of supplying and installing selected backfill material adjacent to

structures in accordance with these Specifications and in locations as shown on the Drawings

or instructed by the Engineer.


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315.2 Material

The material shall be hard, clean, crushed rock or gravel complying with the following

grading:-

Sieve Size % passing by weight

63mm 100

37.5mm 85-100

19mm 0-20

9.5mm 0-5

315.3 Construction

The method of construction will be at the discretion of the Contractor, but details must be

submitted for the Engineers approval before commencement of the work. All details of the

permeable backfill shall be as shown on the Drawings and the degree of compaction shall be

as instructed by the Engineer.


Unless this material is specified as included in another pay item, the quantity of permeable

backfill to be measured and paid for will be the number of cubic metres of suitable material

supplied, placed and compacted in accordance with the details shown on the Drawings. Any

material placed beyond the dimensions shown on the Drawings will not be measured for

payment.

315.5 Rates

The work measured as provided above will be paid for at the Contract price per unit of

measurement for the item listed below, which price and payment will be full compensation for

furnishing and placing all materials, and for all labour, equipment and other incidentals

necessary to complete the work in accordance with the Drawings, specifications and as

directed by the Engineer.


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Permeable backfill Cubic metre

316

Reinforced Earth Backfill

DELETED


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SECTION 400 Sub-bases, bases (non-bituminous) and shoulders

Clause 401 Granular Sub-base

The following amendments are made to Clause 401 of the MOSRT&H Specification:-

401.1 Scope


401.2 Materials

401.2.1

The third sentence of the first paragraph shall be deleted and the following substituted.

The material shall be free from organic matter, clay balls or other deleterious materials and

shall conform to one of the gradings given in Table 400-1. The minimum CBR value of the

granular sub-base material when tested in accordance with IS: 2720 (Part 16) when

compacted to 98 % of MDD determined in accordance with IS: 2720 (Part 8) and soaked for

four days shall be 30 %.

401.2.2 Physical Requirement

The minimum CBR values from Table 400-1 and Table 400-2 shall be deleted and substituted

with 30 % for each grading.

401.4 Construction Operation

401.4.1 Preparation of Subgrade



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401.4.2 Spreading and Compacting

The second and third paragraphs shall be deleted and substituted by the following:

When the sub-base consists of a combination of materials mentioned in Clause 401.2.1, mixingshall be done off site in an approved mixing plant of suitable capacity having provision for

controlled addition of water.

The following paragraph shall be added after the last paragraph:

At all areas not accessible to the roller, the material shall be compacted thoroughly by

approved mechanical tampers or compactors.

401.5 Surface Finish and Quality Control of Work




401.8 Rate

The work measured as provided above will be paid for at the contract price per unit of

measurement for the item listed below:


Granular sub-base:

a) Stone dust and medium sand

b) Brick Bats and medium sand

Cubic metre

Cubic metre

402 Lime treated soil for improved sub-grade / sub-base

DELETED


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403 Cement treated soil for sub-base / base

DELETED

404

Water Bound Macadam Sub-base/base


405 Crushed Cement Concrete Sub-base/base

DELETED

406 Wet Mix Macadam Sub-base / Base

406.1 This clause shall remain as in MOSRT&H specification, unchanged

The following amendments are made to Clause 406 of the MOSRT&H Specification:-

406.2 Materials

406.2.1 Aggregates

406.2.1.1 Physical Requirements

The following shall be added to Table 400-10: "Physical Requirement of Coarse Aggregates

for Wet MixMacadam for Sub-base / Base.

In addition to the tests listed above, the coarse aggregates of Wet Mix Macadam Base shall

comply with the following:

Test Test Method Requirement

3

.

Water absorption value IS: 2386 (Part 3) Less than 2%

4

.

Sodium sulphate

soundness

IS:2386 (Part 5) Less than 12%

The following shall be added after the last paragraph:


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The California Bearing Ratio of the Wet Mix Macadam Base when tested in accordance with IS:

2720 (Part 16) at 98 % of the MDD determined in accordance with IS: 2720 (Part 8) and

soaked for four days shall not be less than 80 %.

406.2.1.2 Grading Requirements

The following shall be added after Table 400-11: "Grading Requirements of Aggregates for

Wet Mix Macadam for Sub-base/Base":

In addition to the grading requirements listed above, the coarse aggregates of Wet Mix

Macadam Base shall comply with the following:

The fraction of the aggregate passing the 2.36 mm sieve in Wet Mix Macadam Base shall

consist of rock or gravel screenings and shall be free from loam, organic or other deleterious

matter.

406.3 Construction Operation

Add the following amendment in this Clause:-

406.3.2Provision of lateral confinement of aggregates

Add the words or by kerbs/kerbs and channels and their foundations between the words

shoulders and along in the 4th line of this Sub-Clause.

406.4 Opening to Traffic



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406.5 Surface Finish and Quality Control of Work


.

406.6 Rectification of Surface Irregularity




406.9 Rate


Clause 407 Shoulder, Islands and Median

This shall remain unchanged as in MOSRT&H Specification

Clause 408 Cement Concrete Kerb and Kerb with Channel

This clause shall be deleted in its entirety and substituted with the following:

Clause 408 Cement Concrete Kerb / Natural Stone Kerb and Kerb with Channel

408.1 Scope

The work shall consist of constructing cement concrete kerbs, natural stone kerbs, concrete

edgings and kerbs with concrete channel blocks along the footpaths and / or in the central

median or separators in conformity with the lines and levels and dimensions as specified in the

drawings. Where specified or indicated on the Drawings, the exposed up-stand face and top

surface of the kerbs shall be painted alternately in black and white, or yellow.

408.2 Cement Concrete Kerbs, Edgings and Channel Blocks


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408.2.1 Materials

Unless otherwise described in the Contract, concrete kerbs, edgings, quadrants and channel

blocks shall be hydraulically pressed pre-cast blocks. During manufacture the kerbs/channel

blocks shall be subjected to a pressure of not less than 7 MPa. The method of manufactureshall prevent the loss of the finer particles of cement during the pressing process.

The method of manufacture and testing shall comply with the requirements of IS: 5758, as

amended here below, and to the cross Clauses shown on the Drawings. All materials shall

conform to the requirements of IS: 5758 and as specified herein.

For all kerbs, and associated works specified in this clause, the cement shall be ordinary

Portland cement conforming with Clause 1006 of the Specifications. Kerbs shall be

manufactured using a concrete mixture containing not less than 350 kg of cement per cu.

metre of mix. The concrete when tested in accordance with IS: 516 shall attain a 28 days

compressive strength of not less than 30 MPa, determined on cubes specimens.

The top edge and front face of individual pre-cast kerb, channel or edging units shall not

deviate by more than 1 mm from the nominal profile when checked with a straight edge.

The Contractor shall submit samples of the various types of concrete kerbs for testing and

approval by the Engineer before commencing the work.

Sand / cement mortar for bedding shall comply with Clause 1304 of the Specification, except

as described below. Class 1 mortar shall be mixed in the proportions 1volume cement to 3

volumes fine aggregate. Water added shall be the least amount which will yield a mix of

suitable consistency for masonry work.

408.2.2Construction Operations

After preparation and compaction of the granular sub-base pavement layer, the surface shall

be regulated under the line of the kerbs with additional sub-base material trimmed and

compacted to the lines and levels shown in the Drawings to provide the platform for

constructing the kerb or kerb and channel block foundation.

Pre-cast concrete kerbs, edgings and channels shall be laid and bedded in a layer of Class 1


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mortar not less than 10 mm and not more than 40 mm thick, on a foundation of concrete

grade M 20. Kerbs shall be backed with grade M 20 concrete.

Joints between kerb stones, other than expansion joints shall be of uniform width not greater

than 4 mm and shall be filled with Class 1 mortar.

Expansion joints shall be provided through the kerbs, kerb foundation and kerb backing at 9

metre spacing along the kerb run. The joint filler shall be formed of 12 mm thick bitumen

impregnated fibre-board complying with IS: 1838 (Part 1).

Any unit of kerb, channel, edging and quadrant deviating more than 3 mm in 3 m from line

and level shall be made good by lifting and relaying.

408.2.3 Measurement

Cement concrete kerbs, edgings and channel blocks shall be measured separately in linear

metres for the complete item of work. No separate item will be made for kerb and/or channel

foundations, concrete backing, joints or expansion joints.

408.2.4 Rates

The Contract unit rates for concrete kerbs, edgings, quadrants and channel blocks shall be

payment in full compensation for furnishing all materials, labour, tools, equipment for

construction and other incidental cost necessary to complete the work.

408.3 Natural Stone Kerbs and Edgings

DELETED


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408.4 Kerb Painting

408.4.1 Materials

Where specified on the drawings kerbs shall be painted with quick-drying chlorinated

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