Specification Building Works

7/31/2019 Specification Building Works

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Table of Content

b) Holdfasts...........................................................................................................................................15

c) Fixtures & Fastening .....................................................................................................................15

j) Fittings..............................................................................................................................................15

m) Aluminum Sheets.............................................................................................................................15

1.1 Examine the site...............................................................................................................................15

1.2 Cleaning & Grubbing.....................................................................................................................15

1.3 Setting Out.......................................................................................................................................16

1.4 Excavation........................................................................................................................................16

1.5 Finish of Trench..............................................................................................................................16

1.6 Finds.................................................................................................................................................16

1.7 Shoring.............................................................................................................................................16

1.8 Protection.........................................................................................................................................16

1.9 Disposal of Excavated Materials....................................................................................................16

1.10 Water in foundation........................................................................................................................16

1.11 Trench filling...................................................................................................................................16

1.12 Measurement...................................................................................................................................17

b) Test for Reinforcement...................................................................................................................24

c) Dimensions of Reinforcement.........................................................................................................24

d) Bending Reinforcement..................................................................................................................24

e) Fixing Reinforcement......................................................................................................................24

f) Cover of Concrete............................................................................................................................24

2.15 Form work.......................................................................................................................................26

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a) Design...............................................................................................................................................26

b) Deflection and Camber...................................................................................................................26

c) Supports...........................................................................................................................................26

d) Joints and Edges..............................................................................................................................26

e) Cleaning and Treatment of Formwork.........................................................................................27

f) Striking or Removal of Formwork................................................................................................27

2.16 Measurement...................................................................................................................................27

3. Brick & Stone Work.......................................................................................................................28

3.1 Scope.................................................................................................................................................28

3.2 Mixing..............................................................................................................................................28

3.3 Scaffolding.......................................................................................................................................28

3.4 Wet Foundation...............................................................................................................................28

3.5 Workmanship..................................................................................................................................28

a) Brickwall, Column, etc....................................................................................................................28

b) Brick in soling, pavements..............................................................................................................28

c) Stone in soling..................................................................................................................................28

d) Stone wall.........................................................................................................................................29

3.6 Measurement and Payment............................................................................................................29

4.1 Materials..............................................................................................................................................29

a) Timber..............................................................................................................................................29

b) Holdfasts...........................................................................................................................................29

c) Fixtures & Fastening .....................................................................................................................29

j) Fittings..............................................................................................................................................29

m) Aluminum Sheets.............................................................................................................................29

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a) Solid Panelled Shutter.....................................................................................................................30

d) M.S.Grills.........................................................................................................................................30

4.3 Measurement & Payment...............................................................................................................30

6. FLOOR FINISHES.........................................................................................................................30

6.1 Scope.................................................................................................................................................30

6.2 Earth Filling.....................................................................................................................................30

6.3 Sand Filling......................................................................................................................................30

6.4 Flat BK Soling..................................................................................................................................30

c) Stone in soling..................................................................................................................................31

6.5 Cement Concrete Floor Finish\:.....................................................................................................31

6.9 Clay Floor Tiles\:.............................................................................................................................31


7. Roofing and Roof finishes...............................................................................................................31

7.2 Workmanship..................................................................................................................................31

a) Timber Truss\:.................................................................................................................................31

i) Eave board\:.....................................................................................................................................31

b) Tubular Truss\:...............................................................................................................................31

d) C.G.I. Sheet Roofing.......................................................................................................................32

e) Clay roofing tiles\:...........................................................................................................................32


8. Plastering and Pointing...................................................................................................................32

8.1 Plastering and pointing in wall, ceiling, columns\:.......................................................................33

8.4 Pointing with cement mortar.........................................................................................................33

8.7 Measurement & Payment...................................................................................................................33

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9. Painting Work.................................................................................................................................33

9.1 Scope.................................................................................................................................................33

9.2. Workmanship..................................................................................................................................33

b) Lime Wash\:.....................................................................................................................................33

c) Colour Wash\:.................................................................................................................................33

g) Synthetic Enamel Paint\:.................................................................................................................34

e) Primer Paints...................................................................................................................................34

f) Linseed oil\:......................................................................................................................................34


FENCING ................................................................................................................................................35

1.Scope ......................................................................................................................................................35

2.Materials ................................................................................................................................................35

3.Spacing of Posts and Struts: ...................................................................................................................35

4.Fixing of Posts and Struts: ......................................................................................................................35

5.Fixing Barbed Wire ................................................................................................................................35

4.Measurement ..........................................................................................................................................36

5.Rate .........................................................................................................................................................36

SPECIFICATION FOR SANITARY & PLUMBING WORKS .........................................................38

1.STANDARDS ..........................................................................................................................................381.1 IS Standards / Specifications ............................................................................................................381.2. Workmanship .................................................................................................................................38

2.SANITARY FIXTURES AND ACCESSORIES .........................................................................................382.1 General .............................................................................................................................................382.2 Water Closets ...................................................................................................................................39

2.3 Urinals and Partitions .......................................................................................................................392.4 Lavatory (Basins) .............................................................................................................................422.5 Stainless Steel Sink & Draining Board: ............................................................................................422.6 Bathroom Fittings .............................................................................................................................42

44

WATER SUPPLY ...................................................................................................................................45

1. SCOPE ..................................................................................................................................................45

2.MATERIALS ...........................................................................................................................................45

2.1 GI Pipes and Fitting ..........................................................................................................................452.2 Cast Iron Pipes ................................................................................................................................452.3 Cast Iron Double Flanged Pipes ......................................................................................................45

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2.4 Sluice Valves ...................................................................................................................................452.5 Air Valves ........................................................................................................................................452.6 Scour Valves ....................................................................................................................................452.7 Fire Hydrants (Underground) ...........................................................................................................462.8 Fire Hydrants (Above Ground) .........................................................................................................462.9 Full- way Valves ...............................................................................................................................462.10 Ball Valves .....................................................................................................................................46

2.11 Anchor Blocks ................................................................................................................................462.12 Valve Chambers .............................................................................................................................46

3. WATER SUPPLY (EXTERNAL) .............................................................................................................463.1 Pipes .................................................................................................................................................463.2 Making Connections to Existing Mains ...........................................................................................463.3 Trenches ...........................................................................................................................................473.4 Measurement ....................................................................................................................................47

4. WATER SUPPLY (INTERNAL) ..............................................................................................................474.1 Pipes .................................................................................................................................................474.2 Fittings .............................................................................................................................................474.3 Valves ..............................................................................................................................................47

4.4 Brass Fittings ....................................................................................................................................474.5 Ball Cocks .................................................................................................................................. ......48

5.METHOD OF EXECUTING ...................................................................................................................485.1 Pipes and Fittings .............................................................................................................................485.2 Jointing .............................................................................................................................................485.3 Clamps .............................................................................................................................................485.4 Unions ..............................................................................................................................................485.5 Flanges .............................................................................................................................................485.6 Painting ............................................................................................................................................495.7 Insulation ..........................................................................................................................................495.8 Testing ..............................................................................................................................................495.9 Measurement ....................................................................................................................................49

5.10 Rate ................................................................................................................................................49

SOIL, WASTE, RAIN WATER AND VENT LINES ........................................................................ ...50

SCOPE .......................................................................................................................................................50

1.STANDARDS ..........................................................................................................................................501.1 IS Standards / Specifications ............................................................................................................50

2.HEAVY CAST IRON PIPING SYSTEM ........................................................................................... ........502.1 Material ............................................................................................................................................502.2 Fixing ...............................................................................................................................................512.3 Testing ..............................................................................................................................................52

2.4 Measurement ....................................................................................................................................53

3.HDPE / PVC PIPE SYSTEM ...................................................................................................................533.1 Material ............................................................................................................................................533.2. Fixing ..............................................................................................................................................533.3 Measurement ...................................................................................................................................53

4.GALVANIZED IRON PIPES WASTE ......................................................................................................544.1 Material ............................................................................................................................................544.2 Cutting, Laying & Jointing of Pipes & Fittings ................................................................................544.3. Testing .............................................................................................................................................544.4 Measurement ....................................................................................................................................544.5 Rate shall include all material and labours to complete the job........................................................54

5. EXCAVATION & RELATED WORKS FOR EXTERNAL PLUMBING ...................................................555.1 Alignment and Grade ........................................................................................................................55

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5.2 Excavation in Tunnels ......................................................................................................................555.3 Opening out Trenches .......................................................................................................................555.4 Obstruction of Roads ........................................................................................................................555.5 Removal of Filth ...............................................................................................................................555.6 Excavation to be taken to proper depths ...........................................................................................555.7 Refilling ...........................................................................................................................................555.8 Contractor to restore settlements and damage ...................................................................................56

5.9 Disposal of Surplus Soil ...................................................................................................................565.10 Timbering of Sewer and Trenches ..................................................................................................565.11 Shoring of buildings / structures .....................................................................................................565.12 Removal of water from sewer, trenches, etc.................................................................................... 565.13 Cement concrete, brick work & finishing .......................................................................................565.14 Excessive excavation ......................................................................................................................575.15 Increase width, depth ......................................................................................................................575.16 Measurement ..................................................................................................................................57

6 MANHOLES AND RELATED WORKS ........................................................................................... ........576.1 Manholes ..........................................................................................................................................576.2 C.I. Manhole covers .........................................................................................................................576.3 R.C.C .Manhole Covers ....................................................................................................................586.4 Drop Connections ............................................................................................................................58

7. SALT GLAZED STONE WARE PIPES SYSTEM ....................................................................................587.1 Material ............................................................................................................................................587.2 Laying ..............................................................................................................................................587.3 Jointing .............................................................................................................................................597.4 Testing ..............................................................................................................................................597.5. Measurement ...................................................................................................................................597.6 Gully Traps .......................................................................................................................................597.7. Measurement ...................................................................................................................................59

8. REINFORCED CEMENT CONCRETE PIPES SYSTEM .......................................................................598.1 Material ............................................................................................................................................59

8.2 Laying ..............................................................................................................................................608.3 Jointing .............................................................................................................................................608.4 Testing ..............................................................................................................................................608.5. Measurement ...................................................................................................................................608.6 Rate ..................................................................................................................................................60

ELECTRICAL WORK ..........................................................................................................................61

PREAMBLE ...............................................................................................................................................61

ELECTRICAL ENGINEERING WORKS ....................................................................................................61

General .....................................................................................................................................................61

Regulations and standard .........................................................................................................................62Electricity supplies ............................................................................................................................62Design, construction, operation and reliability ...................................................................................62Wiring ...............................................................................................................................................62

Cable installation ..........................................................................................................................62Distribution Boards .......................................................................................................................62Luminaries and Lamps ..................................................................................................................63

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SPECIFICATION FOR CIVIL WORKS

NOTES:

1. The work shall be carried out according to the Specifications whether specifically mentioned in it or not. Nopayment for any work in any form shall be made unless it is definitely stated as an item in the Bill of Quantities.

Whenever the Specifications are not given or ambiguous, the relevant Indian Standard and further amendments ordecision of the Engineer shall be considered as a final and binding.

2. The work shall be carried out simultaneously with the electrical, plumbing, sanitary and other services and incooperation with the Contractors or the above services. The work shall be carried on till it is completedsatisfactorily. The Contractor shall keep the other Contractors informed well in advance of the proposed programof the work so that the proposed work is not hindered. The Contractor shall further cooperate with otherContractors in respect of any facilities required by them e.g., making holes in shuttering for pipes, electricconduicts, fan hooks etc. However, nothing extra shall be admissible to him for such reasonable assistance andfacilities afforded to other Contractors and the Contractor shall be deemed to have taken these factors intoconsideration while quoting his rates.

3. The work shall be related to the Drawings which the Contractor is presumed to have studied. Nothing extra will bepaid for any item on its shape, location or other difficult circumstances, even if the schedule makes no distinction

as long as the item is shown in the Drawings.

4. The source of materials stated in the Specifications are those from which materials are generally available.However, materials not conforming to specifications shall be rejected even if they come from the stated sources.The Contractor should satisfy himself that sufficient quantity of material of acceptable specification is availablefrom the stated or other sources.

5. "Engineer" shall mean ........................................................................... and "Employer"means .......................................................................... .

6. The requirements of specifications under A: General and B: Materials shall be fulfilled by the Contractor withoutextra charge including transportation or any other taxes involved i.e. the item rates quoted shall be deemed to havetaken these into account.

7. Engineers Representative " shall mean ............................................

8. Project Engineer shall denote the ...................................................

A. General

1. Drawing, Instructions, Measurements :

All the Works shall be done according to the Drawings and instructions of the Engineer and the Contractor shallarrange to test materials and/or soundness and sufficiency, If after any such test and in the opinion of the Engineerany work or position of work is found to be defective or unsound the Contractor shall pull down and re-executethe same at his own cost. Defective materials shall be removed from the site.

2. Clearing the Site :

The Site described and shown on the plans plus 6m. all round the building shall be cleared of all obstructions,loose stones and materials, rubbish of all kinds as well as brush-wood. All holes or hollows whether originallyexisting or produced shall be well rammed and leveled off as directed. Also the Contractor shall dress the site 6m.all round the building after completion, maximum cutting or filling being 300mm. No extra shall be paid for this,unless specified otherwise.

Trees :

No trees shall be cut without permission. If any trees have to be cut, this shall form an extra item. For the

purpose of the Specification a tree shall be defined as a growth whose circumference of the trunk at 300 mm. fromthe base is not less than 900 mm.

Measuring Materials :

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Materials requiring measuring shall be measured separately in boxes of appropriate sizes before being mixed.

6. Temporary Protection :

All trenches, walls, newly laid concrete or other works requiring protection from weather or accidental injury shallbe protected by means of tarpaulin or in other way so as to keep the work immune from damage. Nothing extrashall be allowed for on this matter.

3. Quality of Work :

Materials, tools and plants and workmanship shall be the best of several kinds obtainable in the market and asapproved by the Engineer.

4. Leave clean :

On completion, all Works must be cleaned up, rubbish removed and the Works and site cleaned of surplusmaterials, debris and other accumulations and everything left in clean and orderly condition by the Contractor.

5. Storage :

Safe, dry and proper storage shall be provided for all materials, particularly for cement. The capacity of thecement storage godown shall at least 200 bags installed at the site of work.

9. Contractor's Laboratory :

The Contractor shall provide a laboratory at all sites with equipment at his own cost within 28 days after signingthe " Form of Agreement" then maintain till the Contract period for carrying out the test therein under thesupervision of a qualified engineer and to be removed on completion of the work. The laboratory shall haveenough space housed in a weatherproof building designated and used exclusively for the purpose of testing. Thelaboratory shall be maintained in a clean, tidy and orderly fashion to the satisfaction of the Engineer. TheContractor's laboratory shall have the following equipment in working condition. labor and materials required fortests.

Standard IS. Sieves for testing sand and aggregates upto 40 mm. ............. 1 setsWeighing balance upto 5 kg with accuracy upto 5 gm ..............1 unitGlass measuring flask 1/2 litre and 1 litre ...............1 eachSlump cone ...............1 unitCube mould metal (150 mm) .............. 6 nosWater tank for curing of concrete cubes to the satisfaction of theEngineers Representative ............... 1 set.Concrete mixture 280 litres ............... 1 NoNeedle Vibrator ................ 1 Set

The Contractor shall maintain the equipment in a serviceable condition and immediately correct or replace it if itis found to be inaccurate.

The Contractor shall perform tests on materials and site-cast concrete cubes as specified and shall submit to the

Engineers Representative two copies of the result of each test, such results being entered on forms as approved bythe Engineer. The third copy of the result of each tests shall be retained in the Contractor's Laboratory. Withoutrelieving the Contractor any of his responsibilities for the testing of materials the Engineers Representative may,as and when desired, carry out any of the tests, using the facilities provided by the Contractor for this work.

The Contractor shall at his own cost arrange and carry out the tests of materials to be used in the Works or anyother tests, requiring other equipment, deemed necessary by the Engineer/Engineer' s Representative. These testsshall be conducted at a testing laboratory chosen by the Engineer.

10. Facilities for the Engineers/Engineers Representative

10.1 General

The Contractor shall provide and maintain the site offices, laboratory, furnishings and equipment for use of theEngineers Representative as described herein at contractors owm cost. Unless the Engineers Representativeagrees otherwise all facilities provided for his use shall be new.

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10.2 Site office for the Engineers/Engineers Representative

The Contractor shall provided the temporary site office for the exclusive use of the Engineers Representatives atsuitable locations to be approved by the Engineers Representative. Temporary site Office shall have net area ofapproximately 12 sq.m comprising 1 room with bathroom facility. The office shall be fully furnished andequipped by the Contractor in accordance with the schedules.

10.3 Schedules of Furnishings and Equipment for the Engineers Representatives Accommodation

The following schedules are attached listing the furniture and equipment that the Contractor shall provide for theEngineers Representatives offices cum accommodations.

1. Schedule of Office Equipment2. Schedule of Survey Equipment3. Schedule of Furniture for the Office

Note : Where brand/model names are given they are indicative only of the quality/standard of the equipmentthat should be provided and the Contractor can propose to provide other brands/models, all to the approval of theEngineers Representative.

All equipment, except consumable/expendable items shall revert to the Contractors ownership on completion of

the Contract.

1. SCHEDULE OF OFFICE EQUIPMENT

Item Description Units

Programmable Calculators : Casio fx 850 1

Draughtsman instruments including pencils, scales, set squares, straight edge, curves etc. 1 set

Heavy duty punching machine 1

Heavy duty stapling machine 1Miscellaneous office items including : Staplers, Punches, Files, Waste paper baskets etc. as required

2. SCHEDULE OF SURVEY EQUIPMENT

Item Description UnitsRanging rodsFibre glass tapes, metric 30m long

Fibre glass types, metric 10m longSteel pocket tapes, 3m long

Survey umbrella2 kg. Hammer and other tools and equipment for surveying as required.

Clip boards, survey forms and other items of stationary, as required.

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B. Materials

The materials supplied and used in the Works shall comply with the requirements of these Specifications. They

shall be new, except as may be provided elsewhere in the Contract or permitted by the Engineer in writing. The

materials shall be manufactured, handled and used in a workmanlike manner to ensure completed work in

accordance with the Contract. Where an Indian Standard is specified, the latest version of the Standard quoted

shall be considered to apply.

Sources : The use of any kind or class of material from more than one source is prohibited, except by written

permission of the Engineer. Such permission, if granted, will set forth the conditions under which the change may

be made. The sources or kinds of materials shall not be changed at any time without written permission of the

Engineer. If the product from any source proves unacceptable at any time, the Contractor shall make such

arrangements as may be necessary to assure acceptable material, either by alterations in plant operations or by a

change of source. Claims for increased costs which maybe occasioned by such alterations or changes will not be

given consideration, unless the source of the unacceptable material was designated in the Contract as a source of

material. When any manufactured product, either new or used, is furnished by the Employer, the location at which

such material will be delivered to the Contractor will be designated in the Contract. In such cases the Contractor

shall haul the materials from the designated delivery point to point of use, and compensation for such hauling willbe considered to be included in the Contract unit price for placing the materials in the finished work.

Inspection and acceptance of materials : Final inspection and acceptance of materials will be made only at the site

of the work. The Engineer reserves the right to sample, inspect and test materials throughout the duration of the

work, and to reject any materials which are found to be unsatisfactory at the time of use. A preliminary inspection

of materials may be made at the source for the convenience of the Contractor, but the presence of DOEs

Representative at the source shall not relieve the Contractor of the responsibility of furnishing materials which

comply with these Specifications. The Engineers Representative shall have free entry at all times to those parts of

any plant which concern the manufacture or production of the materials ordered.

Samples and Tests: The Contractor shall submit samples of all materials for the approval of the Engineer prior to

commencement of the Works.

Defective Materials: All materials which do not conform to the requirements of the Contract will be rejected

whether in place or not . They shall be removed immediately from the site unless otherwise permitted by the

Engineer' s Representative.

1. water:

Water shall be clean and free from oil, waste, acid or other organic matter in solution or suspension. Water shall befrom municipal main or tank or well water . Storage for the water shall be of sufficient size and as directed by theEngineer . The contractor shall make his own arrangements for supply of water.

2. Earth:

Earth for filling and terracing shall be free from ass rubbish, organic or vegetable growth including roots, weedsetc. All clods shall be first broken down.

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3. Sand:

Sand shall be clean river or pit sand of approved quality and free from salt, earth, dust or other impurities. Ifrequired by the project Engineer , it shall be washed with clean water and not more than 5% of fine materials(clay, dust & silt) will be allowed, as tested by the settlement in water. The sand may contain particle size upto5mm and should be well graded. Coarse sand for concrete work shall be from local rivers or from any other placeas approved by the Engineer and shall conform to cement concrete specification.

4. Ordinary Portland Cement:

Cement should be fine. its chemical composition, consistency, tensile and compressive strength, soundness, settingtime must be according to I.S. it should be packed in gunny bags or waterproof paper bags and should be free fromlumps. It should be stored in a weatherproof building on a floor at least 30 CM clear from the walls, and stored insuch manner that permits of easy access of inspection. It should also be stacked in not more than 6 layers high toprevent bursting of bottom bags.

5. Stone:

Stone for rubble masonry shall be of the best of its kind. It shall be strong, angular, free from flakes and must be ofquality approved by the project Engineer. No earthy or discolored, weather or water worn stone shall be used.Stone in foundations shall be from local quarries or from any other place as approved by project Engineer. Stone

for stone masonry shall be of the type specified. It shall be hard, sound, durable free from decay and weathering.Stone with round surface shall not be used. Before starting the work, the contractor shall get the sample of stoneapproved by the Engineer . Size of the stones shall be as specified.

6. Cement Mortar:

Cement mortar shall be of proportions specified for each type of work in the schedule. It shall be composed ofPortland cement and sand. The ingredients shall be accurately gauged by measure and shall be well and evenlymix together in a mechanical pan mixer, care being taken not to add more water than is required. No mortar thathas begun to set shall be used. River sand shall be used unless otherwise specified. If hand mixing is allowed thenit shall be done in brick tanks. The gauged materials shall be put in the tank and mixed dry. Water will then beadded and the whole mixed again until it is homogeneous and of uniform color. Required quantity of cement shallbe mixed at one time and shall not be such as to exceed mortar amount that can be consumed within half an hourof its mixing .

7. Aggregates

Aggregates shall be obtained from an approved source. They must be chemically inert, strong, hard, durable, free formadhering coatings, salts, organic or other impurities and shall be washed or screened as directed.

a) Fine Aggregates and Sand

Fine aggregate and sand shall be clean, sharp, coarse, hard siliceous material and equal at all times to the sampleswhich shall be deposited with and approved by the Engineer.

The caustic soda tests for organic impurities shall show a colour not deeper than of the standard solution. The settingtest for natural sand shall be made and after being allowed to settle for three hours the layer of silt deposit on the coarse

material shall not exceed 8% and the layer of mica deposit shall not exceed 2%.

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b) Grading limits for fine aggregate

IS Sieve Required grading

10 mm 100 %4.75 mm 90 - 100 %2.36 mm 85 - 100 %1.18 mm 75 - 100 %

600 microns 60 - 79 %300 microns 12 - 40 %150 microns 0 - 10 %

The contractor shall supply all necessary equipment for the testing of fine aggregates and sand for the use of the Engineer.

c) Coarse Aggregates and Gradings

All aggregates shall confirm to latest IS 383. Aggregate shall be from hard stone to sizes as specified under items ofworks. In general, 40mm maximum gauge aggregate shall be used for mass concrete in foundation and 19mm downgauge, graded aggregate broken from approved quality of stone for RCC work.

40mm gauge aggregate shall be such that not more than 5% shall exceed 40mm and not less than 25% smaller than

19mm. No piece shall be in any case be larger than 45mm. It shall be screened free from dust or other foreignmaterials.

19mm gauge aggregate shall be as given in RCC specifications. If proper gauge of aggregate is not being obtainedsieving may be insisted upon in which case the contractor shall supply necessary materials sieves and labour at his owncost.

The Contractors should supply samples of the aggregate for the purpose of making preliminary tests for concrete.Method of sampling of aggregate for concrete shall be as per IS 2430-1969 and method of test for aggregate forconcrete shall be as per IS:2386.

d) Aggregates Storage

Each grade of aggregate shall be stored on the works in separate heaps so that there shall be no possibility of any inter-mixing. Any materials which have become inter-mixed shall be removed from the site forth with by the contractor.The materials shall be stored on a timber or concrete floor and the piles shall be as large as possible, flat topped anddrained.

8. Bricks

All bricks shall be of good quality, approved by the Engineer. The bricks shall be free from grit and otherimpurities such as lime, iron and other deleterious salts, well burnt, copper colored, sound, hard, square with sharpedges and shall give ringing sound when struck with a mallet. They shall be of uniform size. No brick after 24hours immersion in water shall absorb water more than 15% of its weight. Chimney made local bricks shall be ofbest quality available, satisfying above mentioned properties.

9. Mild steel/Torsteel

The reinforcement shall be plain round bars of mild steel or torsteel as per schedule, as approved by the Engineer.The reinforcement shall be free from filings, loose rust, mill scale, paint, oil, grease, adhering earth, or any othermaterial that in the opinion of the Engineer may impair the bond between the concrete and the reinforcement orthat courses corrosion of the reinforcement or disintegration of the concrete .Test certificates may be required fromthe suppliers, and in addition, the contractor must undertake tensile and bending tests on random samples of thereinforcement delivered to the site. All steel, which is represented by a sample, which fails to reach the minimumrequirements as per schedule is to be removed from the site immediately.

10. Scafolding

Scaffolding shall consist of wood bellies and necessary battens and planks. All the scaffolding members shall be checkedbefore installation for their strength and stiffness and tied up properly. steel scaffolding if available, may also be used andwhere necessary it shall be erected on double supports. Planks shall be fixed and tied together. In case of finished work suchas plastering, painting and distempering, no part of the scaffolding should touch the structure. where ladders are used,gunny bags shall be tied up at the ends to prevent any damage to work by sliding or tipping.

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11. Timber

Timber shall be of the type as stated in schedule and of the best kind available, perfectly dry, well seasoned, free fromknots, cracks, shakes and other defects and any appearance of rot.

12. Oil Paints and primers

These shall be only of ready mixed type in sealed tins of approved makes as specified.

13. Cement paints :

These shall be of approved brand in sealed tins or packages as specified.

14. Holdfasts :

The Iron Holdfasts shall be of the 12" total length one end bent and other fishtailed of the form as shown in thedrawing. There shall be 2 such Holdfasts on each side of the frame upto 4'0" height ( 4 in all) and 3 on each side of theframe above 4'0" (6 in all). The Holdfasts shall be embedded in concrete block of 9"x4"x4" in 1:2:4.

15. Fixtures & Fastening :

All Fixtures Fastenings shall be of brass or oxidized brass unless otherwise described in the item and shall be new,should and strong. They shall be of the best quality and workmanship. The size, shape, design and finish shall be asdirected by the Site Incharge for approval and kept in site office for comparison All fixtures damaged during fixingshall be removed and new ones fixed in their placed and the surface of joinery made good where affected, theContractor's expense.

16. Fittings :

All doors shall be provided with lock handles in both sides and all windows with handles on thinner side. Necessaryhinges, tower bolts hook belts, stops for keeping the leaves open and also wooden blocks to prevent leaves striking thejambs of wall etc. shall be provided. The fitting shall be of steel. Screw shall be of suitable length and correct diameterand shall be fixed with screw driver not by hammering.

17. GI plain sheet :

These shall be of specified gauge fitted with panel pins as per drawings.

C. Workmanship :

1. EARTHWORK IN EXCAVATION AND FILLING

Scope of works:

This specification covers the works of the BOQ items .................................................................

Materials:

(i) Earth : Earth as per specification (Materials) article 2(ii) Sand : Sand as pe specification (materials) article 3(iii) Brick : Brick bats as per specified (Materials) article 8

Workmanship:

1.1Examine the site

The contractor is recommended to examine the site carefully in order to ascertain for himself the nature thereof and thetype of materials to be excavated.

1.2 Cleaning & Grubbing

The site on which the structure is to be built as shown on the area and required for setting out and other operationshould be cleaned of all obstructions, loose stones, materials and rubbish of all kinds, stumps, brush wood trees etc and

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removed as directed, roots being entirely grubbed up. The top soil is to be taken out up to a depth of 6" and wasted.All the serviceable materials will be conveyed and properly stacked as directed within the specified lead.Unserviceable materials shall be disposed off as directed.

1.3 Setting Out

After cleaning the site, the lay out and setting out shall be done by the contractor, based on the drawings supplied bythe Site-Incharge. It will be the responsibility of the contractor to install substantial reference marks, bench marks etcand maintain them as long as required, true to line, curve slopes and levels. The contractor shall assume fullresponsibility for alignment, elevation and dimension of each and all parts of work. Labour required for initiallysetting the reference marks will be paid but subsequent maintenance of all such bench marks and reference marks willbe at the cost of contractor.

1.4 Excavation

Excavation shall be exact to the width and depth indicated on the drawings or to such lesser or greater depth as theEngineer (see definition in condition of contract) may deem necessary and so instruct the contractor in order to obtainsatisfactory foundation.

1.5 Finish of Trench

The bottom of foundation trench shall be perfectly levelled both longitudinally and transversely and the sides of thetrench shall be vertical. If the soil is not good and does not permit vertical sides, the sides should be sloped back orprotected with timber shoring. The bed of the trench shall be lightly watered and well rammed.

1.6 Finds

Any treasure and valuable materials found during the excavation, shall be property of government.

1.7 Shoring

Where necessary to do shoring, the contractor shall be responsible for the design of shoring for proper excavation.

Shoring shall be of sufficient strength to resist side pressure ensuring safety from slips, prevent damage to work andproperty and injury to persons. It shall be removed as directed after all the items for which it is required are completed.

1.8 Protection

Near town and all frequented places, foundation pits, well pits and similar excavation shall be securely fenced andmarked with red lights at night in charge of watchman, to avoid accident. Adequate protection measures shall be takento see that the foundation excavation do not effect on damage adjoining structures. All measures required for thesafety of the excavation. Protection of the people working in and near the foundation trenches, property and the peoplein the vicinity shall be the responsibility of the contractor. The contractor shall be entirely responsible for any injury tolife and damage to property caused by his negligence or accidents due to his constructional operations.

1.9 Disposal of Excavated Materials

Materials excavated form the foundation trenches shall be placed 5ft away from the outer edge of excavation. Allmaterials excavated will remain the property of the employer. Materials not useful in any way shall be disposed asdirected by Site-Incharge.

1.10 Water in foundation

The contractor shall be paid extra for baling out or pumping out if water accumulates in the trench. Necessaryprecaution shall be taken to prevent surface water to enter into the trench by the contractor without any extra payment.The excavation shall be kept free from water:

(a) during inspection and measurement.

(b) when concrete and masonry are in progress and till they come above the natural water level and,

(c) till the Site-Incharge considers that the mortar is sufficiently set.

1.11 Trench filling

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After construction of foundation the remaining portion of the trenches shall be filled up with earth (free from rubbishand refuse matter in layers of 6") and watered and rammed fully using mechanical vibrators.

1.12 Measurement

The measurement of site clearance shall be done in one complete job in LS item.

The measurement for payment of earth work shall be done as follows:

The excavation shall be measured correct up to 1 and be product of length and width of lowest step of the footingaccording to the drawing and depth measured vertically. Where the ground is not level, the average depth shall betaken. Rate shall be of complete work including backfilling ,timbering,pumping out water etc. including all labours,tools and plants required for the completion of the work. The measurement will be computed in cubic contents.

Disposal of excavated earth materials or stacked on the site is measured in cubic content directed as per site incharge.

Gravel packing shall be done as per drawing and instruction of site incharge. Measurement shall be taken for theconsolidated thickness of filling materials and shall not include the extra excavation and filling which contractorexcavates with sloping sides for his conveniency.

The measurement of dry brick soling shall be the net area of length and breadth and payment will be done in squarefeet. The rate shall be for all the materials and labours.

2. CONCRETE WORK

2.1 Scope: This specification deals with the cement concrete, plain or reinforced of specified proportion in foundationand flooring (IS Code of Practice IS:456 latest revision to be complied with unless permitted otherwisehereinafter). The specification covers item no 2.1, 2.2 of BOQ.

2.2 Material: All required materials shall be as specified in STANDARD CONSTRUCTION MATERIALSCement : Ordinary portland cement as per specification (Materials) article 4.

Aggregate: Broken hard stone as specified under the schedule of maximum size of 38 mm for foundation and 20mm for floor, beam, column etc., as per specification (Materials) 7.

Sand : Sand as per specification (Materials) article 3.

Admixtures: The use of admixtures in concrete for promoting workability improving strength, entraining air or forany other purpose may be used only with the prior approval of the Engineer.

2.3 Grades of Concrete:

a)General:

Structural concrete shall be either ordinary or controlled and in three grades designated as M150, M200 andM250, as specified in IS:456 - latest provision.

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Ordinary Concrete:

Ordinary concrete is recommended only when accurate control is impracticable and not necessary. However, ifordinary concrete is allowed by the Engineer, it shall be used only in the concrete of Grades M150, M200 andM250. Ordinary concrete does not require preparation of trial mixes.

Concrete mix proportions for ordinary concrete shall be as per IS:456 - latest revision - and as follows:

Mix Proportions (By Weight) Expected to Give Different Degrees of Workability withDifferent Water Cement Ratios and A Specified Strength.

(For Guidance)

Ratio by Weight ofCement to Gravel

Aggregate

Ratio by Weight of Cementto Crushed Stone

AggregateWork ability Water

Cement

Ratio

CompressiveStrength in 28dayskg/cm2

20 mm Size 38 mm Size 20 mm Size 38 mm Size

Very lowSlump0-25 mm

0.40.50.60.7

360290220160

1:4.81:7.21:8.51:9.0

1:5.31:7.71:8.61:9.0

1:4.51:6.51:7.81:8.7

1:5.01:7.41:8.41:8.9

LowSlump25-30 mm

0.40.50.7

360290160

1:3.91:5.51:8.0

1:4.51:6.71:8.5

1:3.51:5.01:7.4

1:4.01:5.51:8.0

Medium

Slump25-100 mm

0.4

0.50.7

360

290160

1:3.5

1:4.81:6.8

1:3.8

1:5.71:7.9

1:3.1

1:4.21:6.2

1:3.6

1:5.01:7.0HighSlump100-175 mm

0.40.50.60.7

360290220160

1:3.21:4.41:5.41:6.2

1:3.51:5.21:6.71:7.4

1:2.91:3.91:4.71:5.5

1:3.31:4.61:5.71:6.5

Not withstanding anything mentioned hereinbefore, the maximum total quantity of aggregates by weight per 50kg. of cement shall not exceed 150 kg. except where otherwise specifically permitted by the Engineer.

The minimum cement content for each grade of concrete shall be as follows:

Grade of Concrete Minimum Cement Content per Cu.M. of Finished Concrete

M 150M 200M 250

325 kg360 kg420 kg

At least four trial batches are to be made and six test cylinders/cubes taken for each batch noting the slump oneach mix. These cylinders/cubes shall be tested in a testing laboratory approved by the Engineer at 7 days andothers at 28 days for obtaining the ultimate compressive strength. The test reports shall be submitted to theEngineer. The cost of the mix design and testing shall be borne by the Contractor.

On the basis of the above test reports, proportion of mix by weight and water-cement ratio will be approved by theEngineer, the proportions so decided for different grades of concrete shall be adhered to during all concretingoperations. If, however, at any time, the Engineer feels that the quality of the materials being used, has beenchanged from those used for preliminary mix design, the Contractor shall have to run similar trial mixes design,and the Contractor shall ascertain the mix proportions and water - cement ratio for obtaining the desired strength

and consistency. It will be within the competency of the Engineer to reduce the number of trial batches and thenumber of test specimens mentioned above.

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The mixes once approved must not be varied without prior approval of the Engineer.

In designing the mix proportions of concrete, the quantity of both cement and aggregate shall be determined byweight. The Engineer may allow the quantity of aggregates to be determined by equivalent volume basis after therelationship between the weight and volume is well established by trial and the same shall be verified frequently.Water shall be either measured by volume in calibrated tanks or weighted.

All measuring equipments shall be maintained in a clean and serviceable condition and their accuracy periodically

checked.

To keep the water-cement ratio to the designed value, allowance shall be made for the moisture content in bothfine and coarse aggregates and determination of the same shall be made as frequently as directed by the Engineer.The determination of moisture contents shall be according to IS:2386 (Part III) - (latest revision).

2.4. Strength Requirements:

Where ordinary Portland cement conforming to IS: 269 - latest revision or Portland cement- Furnace Slag cementconforming to IS: 455 - (latest revision) is used, the compressive strength requirements for various grades ofconcrete shall be as shown in Table below and shall apply to both controlled concrete and ordinary concrete.

The acceptance of strength of concrete shall be as per clause 5.4 Sample size and Acceptance Criteria of IS: 456

- latest revision subject to the stipulations and /or modifications stated elsewhere in this specification.

Concrete work found unsuitable shall have to be dismantled and replacement to be done as per specification by thecontractor. No payment for the dismantled concrete. the relevant formwork and reinforcement embedded fixtures,etc shall be made. In course of dismantling, if any damage is done to the embedded items or adjacent structures,the same shall be made good free of charge by the Contractor to the satisfaction of the Engineer.

Compressive strengths for different grades of concrete as specified in Table - IV shall always refer to thecylinder/cubes strength based on test conducted on 15 cm diameter and 30 cm height. Other requirements ofconcrete strength as may be desired by the Engineer shall be in accordance with IS: 456 (latest revision).

In exceptional circumstances, the Engineer may accept a concrete of lower strength than specified and which isotherwise unacceptable according to the Acceptance Criteria of IS: 456 - (latest revision), provided the strengthis never less than 80% of the specified strength. All concrete having a strength less than 80% of that specified shallalways be rejected. Payment for concrete of lower strength than specified but accepted by the Engineer shallalways be made at a reduced rate on prorate basis to the strength obtained.

Strength Requirement of Concrete

Compressive strength of 15 cm. diameter and 30 cm.high cylinder or 15 cm. cube at 28 days aftermixing, conducting in accordance with IS: 456 -latest revision

Grade of Concrete Preliminary tests kg/cm2 Work test kg/cm2

M 150M 200M 250

200260320

150200250

With permission of the Engineer, for any of these above mentioned grades of concrete shall also be increasedproportionately to keep the ratio of water to cement same as adopted in trial mix design for each grade of concrete.No extra payment for the additional cement will be made.

2.5 Workability:

The workability of the concrete shall be checked at frequent intervals by slump test. Where facilities exist and ifrequired by the Engineer, alternatively, the compacting factor test in accordance with IS: 1199 - (latest revisions),shall be carried out. The degree of workability necessary to allow the concrete to be well consolidated and to beworked into the corners of formworks and around on the type and nature of structure and shall be based onexperience and tests within the preferred limits of consistency as specified in Table below for various types ofstructures.

Limits of Consistency

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Degree ofWorkability

Slump in mm Use for which concrete is suitable

min maxLow 20 40 Mass concrete foundations without vibrations, simple reinforced section

with vibration.

Medium 50 100 Normal reinforced beams, columns, slabs without heavily reinforcedsection with vibration.

High 100 150 Section with congested reinforcement not normally suitable for vibration.

Note: However, the slump to be obtained for work in progress shall be as per direction of the Engineer.

2.6 Load Test

Load test of structural members may be required by the Engineer when the strength of job control cylinders/cubesfalls below the required strength and is not acceptable as per Acceptable Criteria of IS: 456 - (latest revision). Ifthe load testing is decided by the Engineer, the member under consideration shall be subjected to a superimposedload equal to one and quarter (1.1/4) times the specified superimposed load used for design and this load shall bemaintained for a period of 24 hours before removal. The detailed procedure of the test is to be decided by theEngineer.

If the member shows evident failure, such changes as are necessary to make the structure adequately strong shallbe made free of cost. If on the other hand, the failure becomes evident, the Engineer under special circumstances(with the approval of the designer), can retain the portion of the structure under test, provided suitablemodification for strengthening and/or dispersion of design load is feasible. Cost of such modification of dispersionof load shall be borne by the Contractor.

The entire cost of load testing shall be borne by the Contractor. If a portion of the structure is found to beunacceptable it shall be dismantled and replaced by a fresh structure as per specification. The cost of dismantlingand the cost of concrete, formwork and reinforcement involved in the dismantled portion shall not be paid to theContractor.

If in the course of dismantling, any damage is done to the embedded items and or other adjacent structures the

same shall be made good free of charge by the Contractor to the satisfaction of Engineer.

2.7 Workmanship:

(a) General: All workmanship shall be according to the latest and best possible standards.

(I) Mixing of Concrete:

The proportion of fine and coarse aggregate, cement and water shall be as determined by the preliminary tests oraccording to fixed proportions in case of ordinary concrete and shall always be approved by the Engineer. Thequantities of fine and coarse aggregates shall be determined by weight. The water shall be measured accuratelyafter giving proper allowance for surface water present in the aggregates for which regular check shall be made bythe Contractor. Due allowance shall be made for bulking in case of volume batching in accordance with IS 2386

(Part III) - (latest revision).

Concrete shall be always mixed in a mechanical mixer unless specifically approved by the Engineer for concreteto be used in unimportant structure. The water shall not be poured into the drum of the mixer until all the cementand aggregates Constituting the batch are already in the drum and mixed for at least one minute. Mixing of eachbatch shall be continued until there is uniformity in colour and consistency, but in no case shall mixing be done forless than two minutes and at least forty revolutions after all the materials and water are in the drum. Whenabsorbent aggregates are used or when the mix is very dry, the mixing time shall be extended as may be directedby the Engineer. Mixer shall not be loaded above their rated capacity as this prevents thorough mixing.

The entire contents of the drum shall be discharged before the ingredient for the next batch are fed into the drum.No partly set or remixed or excessively wet concrete shall be used and it shall be immediately removed from site.

Each time the work stop, the mixer shall be thoroughly cleaned and when the next mixing commences, the firstmix shall have 10% additional cement at no extra cost to the Employer to allow for loss in the drum.

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When hand mixing is permitted by the Engineer for concrete to be used in unimportant structures, it shall becarried out on a water tight platform and care shall be taken to ensure that mixing is continued until the mass isuniform in colour and consistency. In case of hand mixing, extra cement @ 10% shall be added to each batch withno extra cost to the owner.

(ii) Conveying Concrete:

Concrete shall be handled and conveyed from the place of mixing to the place of final deposit as rapidly aspracticable by approved means before the initial setting of the cement starts. Concrete should be conveyed in sucha way as will prevent segregation or loss of any of the ingredients. If segregation does occur during transport, theconcrete shall be remixed. During the very hot or cold weather, if directed by the Engineer concrete shall betransported in deep containers which will reduce the rate of loss of water by evaporation and loss of heat.Conveying equipment for concrete shall be well maintained and thoroughly cleaned before commencement ofconcrete mixing. Such equipment shall be kept free from set concrete.

(iii) Placing Concrete:

Formwork and reinforcement shall be approved in writing by the Engineer prior to placing of concrete. Concreteshall be placed in its final position without segregation. The forms shall be well wetted and all shavings, dirt andwater that may have collected at the bottom shall be removed before concrete is placed. The interval between

adding the water to the dry materials in the mixer and the completion of the final placing inclusive of compactionof the concrete shall be not more than initial setting time of the cement, normally 30 minutes for ordinary Portlandcement. The concrete shall be well placed in the formwork by means approved by the Engineer and shall not bedropped from a height or handled in a manner which may cause segregation. Any drop above 180 cm shall have tobe approved by the Engineer. Once the concrete is placed in its final position, it shall not be disturbed. After theconcrete has been placed, it shall not be disturbed. After the concrete has been placed, it shall be spread andthoroughly compacted by approved mechanical vibration to a maximum subsidence without segregation andthoroughly worked around reinforcement or other embedded fixtures into the concrete form and shape. Vibrationshall not be used for pushing and shoveling on concrete. Vibration must be operated by experienced men and overvibration shall not be permitted. Hand tamping in some cases may be allowed subject to the approval of theEngineer.

No concrete shall be placed in open, while it rains. If there has been any sign of separation of cement and sandby washing, the concrete shall be entirely removed immediately. Suitable precautions shall be permitted onfreshly laid concrete. Slabs, beams and similar members shall be poured in one operation normally. Bleeding ofunder layer, if any shall be effectively removed. Moulding, throating, drip coarse, etc. shall be poured as shownon the drawing or as directed by the Engineer. Holes shall be provided and bolts sleeve, anchore fastenings or otherfixtures shall be embedded in concrete as shown on the approved Drawings or as directed by the Engineer. Anydeviation from the Drawing shall be set right by the Contractor at his own expense as instructed by the Engineer.

(iv) Construction Joints:

When the work is to be interrupted, the concrete shall be rebated at the joint to such shape and size as may berequired by the Engineer or as shown on the drawing. All vertical construction joints shall be made with stepboards, which are rigidly fixed and slotted to allow for the passage of the reinforcing steel. If desired by theEngineer keys and/or dowel bars shall be provided at the construction joints. In the case of water retainingstructure water stops of approved material shall be provided if so specified in the Drawings or desired by the

Engineer. Construction joints shall be provided in positions as described, the joints shall be in accordance with thefollowings

In a column, the joints shall be formed about 75mm below the lowest soffit of the beams forming into it.

Concrete in a beam shall be placed throughout without a joint, but if the provision of a joint is unavoidable, the

joint shall be vertical and at the middle of the span. A joint in a suspended floor slab shall be vertical at the middle

of the span at right angle to the principal reinforcement. The locations of construction joint shall be planned by

the contractor well in advance of pouring and will have to be approved by the Engineer.

Before fresh concrete is placed, the cement skin of the partially hardened concrete shall be thoroughly r removed

and surface made rough by hacking, sand blasting, water jetting, air jetting or any other method as directed by the

Engineer. The rough surface shall be thoroughly wetted for about two hours and shall be dried and coated with

1:1 freshly mixed cement sand slurry before placing the new concrete. The new concrete shall be worked againstthe prepared surface before the slurry sets. Special care must always be taken to see that the first layer or concrete

placed after a construction joint is cold. Joints during pour shall be treated with 1:1 freshly made cement sand

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slurry only after removing all loose materials.

(v) Protection and Curing of Concrete

Newly placed concrete shall be protected by approved means from rain, sun and wind. As soon as the concrete has

hardened sufficiently for the surface to be marked, it shall be covered either with sand, hessian, canvas or similarmaterials and kept continuously wet for at least fourteen days after final setting. This period may be extended at

the discretion of the Engineer.

(vi) Control Tests on Concrete:

Six test cylinders/cubes for each type of work shall be taken by the contractor for each 8 hours or less of

concreting. If the value of concrete poured is less than 20 M3 on any day per mixing plant, the Engineer may

exempt or reduce the number of test cylinders. The samples of concrete, shall be tested in as approved laboratory

in presence of the Engineer and the test results shall be submitted in triplicate to the Engineer. The Contractor

shall carry out the sampling and testing according to the provisions of this specification at his own cost. No

payment shall be made for the concrete used in specimens.

To control the consistency of concrete from every mixing plant, slump tests shall be carried out by the Contractorfree of charge every two hours or as directed by the Engineer. The amount of mixing water shall not be changed

without prior approval of the Engineer. Slumps corresponding to the test cylinders shall be recorded forreference. The Engineer if he so desires may order special tests to be carried out on cement, sand or coarse

aggregates, water reinforcing steel, or traverse tests in accordance with I.S.I recommendations. If the materials

tested is found to be suitable for the intended use, the cost of these special tests shall be borne by the Owner. If the

material is found to be not suitable for the intended use the cost of these special tests shall be borne by the

contractor. Further, during the progress of the work if the Engineer has doubt about the quality of any material in

use he can instruct suspension of its use till the material is proved acceptable by test. Any consequent loss arising

out of the suspension shall be borne by the Contractor.

(b) Exposed Surface:

Interior: Imperfect surface, where strength is not required shall be patched and rubbed smooth with carborundum

stone, immediately after the formwork is stripped off, fins and projections shall be removed and the concrete

surface affected thereby shall be rubbed smooth to the satisfaction of the Engineer.

(c) Anchor Bolts, Anchors, Openings, Sleeves, Insets and Other Built-in Fixtures

The Contractor shall leave all openings, grooves, chases etc. in concrete work as shown on the drawings or asspecified by the Engineer. He shall build into concrete work all the materials noted below and shall embed andsecure the same as and when required. The materials is required to be supplied by the Contractor, shall be of bestquality available of approved manufacture and shall be upto the satisfaction of the Engineer.

Materials to be embedded:(i) Inserts, hangers, anchors, opening frames, manholes, covers, floor clips, sleeves and conduits.

(ii) Anchor bolts and plates for machinery, equipment and for structural steel work.

(iii) Dowels bars, etc. for concrete work falling under scope of future works.

(iv) Lugs or plugs for door and window frames occurring in concrete work,

(v) Flashing and jointing in concrete work.

(vi) Any other built-in-fixtures as may be required.

Correct location, exact alignment, etc. of all these shall be entirely the responsibility of the Contractor.

(d) Joints etc.

(I) Expansion and Isolation Joints:

Expansion joints in concrete structures shall be provided at specified places as indicated on the drawings. Thematerials and types of joints shall be as specified below. In case of liquid retaining structures, additional precautionshall be taken to prevent leakage of liquids as may be specified on the drawings or as directed by the Engineer. The

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Engineer may demand test certificates for the materials and/or get them tested.

(ii) Bitumen Boards:

Bitumen impregnated fibre of approved manufacture as per IS: 1838 - latest revision shall be used as fillers forexpansion joints. It must be durable and water proof. At the exposed end, the joint shall sealed with approvedsealing compound to a depth of 25 mm after application of an approved primer. The sealing compound and theprimer shall be applied as specified by the manufacturer.

(iii) Bitumen Compound:

The cap for expansion joints shall be thoroughly cleaned and the bitumen compound laid as per manufacturespecifications. The compound to be used shall be of approved manufacture and shall conform to the requirementsof IS: 1834 - latest revision.

(iv) Separation Joints:

Strong and tough alkathene sheet or equivalent of about 1mm in thickness as approved by the Engineer shall beused. It shall be stucked by an approved sticker to the cleaned surface of the already set concrete to cover it fully.Fresh concrete shall be laid against the sheet, care being taken not to damage the sheet in any way.

(v) Rubber Pad:

Hard foundation quality rubber pads of required thickness and shape are to be put below machine or otherfoundations where required as shown on the Drawings or as directed by the Engineer. The rubber shall be of bestquality of approved manufactures, durable, capable of absorbing vibration and must be chemically inert continueunbroken in contact with moist or dry earth under normal conditions.

2.8 Waterproofing Joints

The materials shall conform to the respective IS Code - latest revision, where applicable. The Engineers approvalto the materials shall be obtained by the Contractor before procurements. If desired by the Engineer, testcertificates for the materials shall be submitted by the contractor. The materials shall be of best quality availableindigenously, fresh and thoroughly clean.

(a) Water Proofing Admixture

I) In Concrete

The admixture shall be of right variety and procured freshly . The admixture shall be approved by the Engineer.The method of application and other details shall exactly conform to the manufacturers specification. The concreteshall have the services of the manufacturers supervision at no extra expense to the Employer to supervise the workif desired by the Engineer.

ii) In Plaster:

The concrete surface to be plastered is to be hacked to the Engineers satisfaction. The plaster shall be made ofcement and sand as approved by the Engineer. If desired by the Engineer, the Contractor shall have the worksupervised by the manufacturers supervisor at no extra cost to the Owner.

b) Other Admixtures in Concrete:

The Engineer may in his direction instruct the Contractor to use any admixture in the concrete.

Payment shall be made extra over the price on concrete on the actual quantity of admixture used at the landed costof admixture plus 15% to cover extra labour, tools, plant, profit, etc.

2.9. Measurement and Rates

Specification- 23


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The measurement shall be done in cum. calculated as per the Drawing. The rates for items shall include cost of allmaterials consumed in the work at all levels, hire charges of materials, tools and plant, cost of labour, insurance,all transport, services, accommodation, supervision, storage, protection etc. complete.

3 . Reinforcement

Scope of works:

This specification covers the works of the BOQ items 3.

Materials :

Mild steel/Tor steel: The reinforcement shall be specified as in the specification (Materials) article 10.

Workmanship:

Test for Reinforcement:

For each consignment of bar reinforcement used in the works the Contractor shall, if required, supply a certificategiving the ultimate strength, yield stress and elongation and the result of the cold bend test for each type and each sizeof bar. Tests for the purpose of obtaining the information shall confirm to relevant I.S.

Dimensions of Reinforcement:

The size of a reinforcement bar described on the working drawings or elsewhere shall be the minimum and the rollingmargin and other tolerances shall be wholly above this size. Bar bending schedule shall be prepared by the Contractorand submitted for approval of the Site-Incharge. Such schedules shall be prepared based on reinforcement details.Nothing extra shall be paid for this.

Bending and binding of Reinforcement:

Reinforcement bars shall be bent by approved means producing a gradual and even motion. Bars shall comply withthe dimensions described in the drawings. Overall dimensions of bent or internal dimensions of bending or the likeshall be within a tolerance of 1. Any discrepancies or inaccuracies found by the Contractor in the drawings or other

documents shall be immediately in the drawings or their documents shall he immediately reported to the Site-Inchargewhose interpretation and requirements relating there to shall be accepted. Hooks and other end anchorage bends formild steel shall be bent to an internal radius of twice the diameter of the bar. This internal radius of the bends atcorners of binders or stirrup or links shall be half the size of the bar embraced by the binder stirrups or links.

Fixing Reinforcement:

Reinforcement shall be accurately fixed and by approved means maintained in the position described. Bars intended tobe in contact shall be securely wired together at all such points with 16 gauge iron tying wire. Binders, stirrups andlinks shall tightly embrace the bars with which they are intended to be in contact and shall be securely wired or, ifapproved, spotwelded thereto. Reinforcement shall be lapped, joined or spliced only at the positions approved.Splices and the like found to be necessary elsewhere shall be formed only if and as instructed. Where practicable barsin each member shall be assembled and fixed in the form of a rigid cage of skeleton before placing in the moulds orformwork. Immediately before concreting, the reinforcement shall be checked for position, cleanliness, freedom fromrust or retarding liquid. Means shall be taken to ensure that reinforcement remains correctly in position with requiredcover during the placing and consolidating of the concrete. Reinforcement projecting from work being concreted oralready concreted shall not be bent out of its correct position for any reason unless approved and shall be protectedfrom deformation or other damage. Reinforcement left projecting for bending with future extensions shall bethoroughly coated with cement grout wash or encased in concrete or otherwise protected from corrosion as instructed.

Cover of Concrete

Unless otherwise described, the clear cover of concrete to the reinforcement shall be as follows:

Horizontal, Vertical or inclined slabs: " or the size of the b

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