Mount Mary Sr

GENERAL INSTRUCTIONS1.In this document -(a)'Specification', 'Clause and 'Table' refer to the 'Specification for road and bridge work' (4th Revision, July 2003) published by the Indian Roads Congress, on behalf of the Government of India, Ministry of Surface Transport (Roads Wing). These specifications shall be treated as an integral part of this Basic Schedule of Rates (hereinafter called the BSR).(b)'Engineer-in-Charge' refers to the Executive Engineer of the Division for the time being.

2.The rates of all items include the elements of setting out and carrying out the work in arrow or part width of road, where directed.3.In the absence of any stipulation to the contrary, unit rate for different items of works are for completing the works to the specifications including full compensation for all those operations detailed in the relevant sections of the specifications under "Rates". The rates are to be considered as the full inclusive rate for the finished work covering all labour, material, royalties, lease, rent, wastage, temporary work, plant, equipment, overhead charges and profit etc., unless otherwise specified.4.Mode of measurements shall be as per provisions contained in the relevant clauses of the specifications unless otherwise specified. Record of levels taken before construction must be sent to the S.E. of the circle by the E.E. 15 days before commencing construction.5.The rates include the elements of hire charges of all types of plants, machinery and equipment required to complete the work unless otherwise specified, e.g. lights, red flag, chowkidars and flagmen to guide traffic on temporary diversions. The rates do not include the work of boring and trials pits, which are to be measured and paid of separately.6.The rates include all cleaning operations. The rates also include provisions of coir rope being used for premix carpets and surface dressings for providing support to edges and strong RS channels as supports to edges for bituminous works.

7.The rates considered for bitumen and emulsion are :-

(i) 60/70 Bitumen (Packed/Bulk at site of work) Rs. 31900/- Per tonne(ii) Bitumen emulsion/Cutback.

Rs. 25000/- per tonne

8.The rates also include the element of testing of samples of various materials by the contractor or use on the work as well as other tests for items of work as stipulated in the specification. Frequency of such tests to the carried out must not be less than the prescribed frequencies as per MoRTH specifications. Copies from Registers containing records of bills/test shall be submitted with the Contractor's bills. The original register shall be submitted along with the final bill. Tests shall be conducted for the Contractor's material by his engineers under the supervision of the Engineer-in-charge or his authorized representatives. The contractor shall get the various mixes (cement concrete and bituminous) designed and shall obtain the approval of the Engineer-in-Charge.9.It shall not be obligatory on the part of the Engineer-in-Charge to provide any assistance in obtaining lease/permits for extraction of minor minerals. The Contractor will not be entitle to any excuse whatsoever on account of any delays in obtaining minor minerals to be used on the work.10.(i)Metal to be used for all bituminous courses and cement concrete shall be crushed in mechanical crushers. Mixers are a MUST for open graded premix carpet or seal coat Type 'B' using bitumen/emulsion. (ii)The Hot Mix Plants must have the essential features listed in the clause 501.3, of the MoRTH specification. The pavers finishers should correspond to the provision laid down in Clause 501.3.5 of these specifications.11.The sections 900 of the specification mentions 'As required' against some of the tests. To save off disputes the following frequencies are specified:-

Granular sub-base(a) Deleterious MaterialOne test per 500 Cum. or part thereof.

(b) C.B.R.

One test per 500 Cum. or part thereof.

12.The surface regularity of the completed sub-grade, sub-base, base courses and widening of surfaces in the longitudinal and transverse directions shall be within the tolerances indicated in the table 900-1 of the specifications. For checking, specifications clause 902 shall apply. Failure to rectify will call for similar action as provided for in the specifications.

13.The work of the shoulders must precede the work of sub-base and base courses and succeed the bituminous courses & cement concrete pavement.

14.In order to obtain the prescribed grading of aggregates for various items specific quantities of standard sizes of aggregates are required, the details of the same are given in MoRTH specifications.

15.In case of any contradiction in the provision of the specifications and this schedule of rates, the provisions of the later would take precedence.

16.Items not included in this BSR shall e adopted from the State PWD BSR as applicable time to time.17.Assumptions made have been in respective chapter in the form of notes, where required.18.Arrangement for traffic during construction shall be as per Clause 112 of MoRTH Specifications for Road and Bridge Works.

19.The supply of materials will be taken either at the location of mixing plant or at the work site as the case may be.20.Contractor will make his own arrangements for borrowing earth. However, compensation for earth taken from private land has been including in the rate analysis for construction of embankment with borrowed earth.21.The requirement of machinery has been worked out assuming effective working period of 6 hours per shift of 8 hours.

22.The source of material and samples are required to be approved by the Engineer before start of any work.

23.The rates of items include cost of testing of soil, materials and works.

24.The due of surface by construction vehicles shall be governed by Clause 119 of MoRTH Specifications.

25.The contractor shall arrange to provide and maintain an adequate equipped field laboratory as per Clause 121.26.Quality Control of works shall be governed by Section 900 of MoRTH Specifications.

27.The various activities of works shall also be documented by photographs and video cassettes as per Clauses 125 & 126 of MoRTH Specifications.

28.The classifications of soil shall be as per Clause 301.2 of MoRTH Specifications.

29.The earth excavated from foundations has been considered to be backfilled and balance utilized locally for road work except in the case of marshy soil.30.The rate analysis for removal of unsuitable soil does not provide for replacement by suitable soil which will have to be paid separately.

31.10 percent extra cement may be provided for concreting under water, where required.32.Grade of cement may be adopted as per mix design.

33.Quantities of cement in various grades of cement concrete have been taken as per IRC 21-2000 and IRC 18-2000.34.The rates for rigid, semi-rigid and flexible crash barriers have been analyzed in chapter-7.35.The coarse and fine aggregates shall conform to IS: 383.36.Certain equipments like road rollers are required to be available at site for complete period of the shift, though from the consideration of their output, they may be required only for 3 to 4 hours. This is necessitated to match with the output of other associated machines like HMP, Pavers etc. In such cases, the hire charges of road rollers have been multiplied with a factor of o.065 to account for the idle period.37.For pricing of RCC slab culverts, the items given in respective chapters in bridge section may be referred.

38.Wherever electric generator has not been provided to run a plant or equipment, it is assumed that it is fitted with a diesel engine.

39.Some of the forms in the field of constructing chemicals have evolved new brands of chemicals for water proofing, sealing of cracks, cementing compounds etc. The market can be explored to meet such requirements.

40.Some of major steel producing firms have evolved thermo-mechanically treated steel which has enhanced strength, better corrosion resistance, ductility, weld ability and high temperature thermal resistance. Enquiries from theses firm can be made on technical specifications and use of such products considered in works based on performance in works where these have already been used.41.Provision of fly ash has been made in embankment construction, sub-base construction and in cement concrete pavement.SECTION-ICHAPTER-I

PART-A

CARRIAGE OF MATERIALS

NOTES

1.The carriage rates of materials given in this chapter includes loading, unloading and cost of stacking. The carriage rate includes contractor's profit also.2.The rates of carriage of materials shall be payable for the net quantity arrived at after deduction of voids as per MoRTH specifications Para 514.5 and table 500.26.3.The rates of materials at site include all taxes, surcharge, royalty, octroi and toll tax etc.4.Provision has been made for a tractor trolley instead of tipper where dismantled materials of sorts or materials having more volume as compared with weight are required to be transported. This arrangement will be economical.

5.The cost of carriage will vary depending upon the riding surface of the road. Provision has accordingly been made considering surface roads, un surfaced graveled roads and katcha tracks.PART-B

ROAD MATERIALS

NOTES

1.The rates are inclusive of all taxes, royalty, sale tax etc. At source including cost of stacking. If stacking is not required no deductions shall be made.2.Name and location of quarry is necessarily to be mentioned in relevant items for estimation purpose only.3.The rates for collection of materials include:-

a. Making of approach to quarry as required.b. Removal of over burden and unsuitable material etc.c. Dewatering of quarry, if necessary.

4.The contractor is required to keep, at quarry site; one set of standard IS sieves and allied testing equipments for gradation of aggregates as per detail PWD standard specifications.5.Deduction of voids for aggregates shall be as per PWD specifications for highways.SECTION - 1

ROADS

CHAPTER: R - 2

NOTES

1.Unless otherwise stated, the rates include sorting and disposal of unserviceable material and stacking of serviceable material within a lead of 100 meters. Extra leads if required could be paid as per Chapter R-1.2.The rates of items of dismantling given in this chapter are for work done in foundation up to a depth of 1.50 meters below ground level and also up to a height of 1.50 meters above ground level. For additional height/depth, the extra rate payable shall be as under:(a)Rs. 5.00 per Cum in the rate of item (Dismantling ) for work in foundation beyond 1.50 meters below ground level for every additional depth of 1.50 meters or part thereof.(b)Rs. 10.00 per Cum. in the rate of item for work in superstructure up to a height 4.00 meters or part thereof from/above 1.50 meters from Ground/Bed level.

(c)Rs. 7.00 per Cum in the rate of item for every additional height of 4.00 meters or part thereof in superstructure in case height exceeds 4.00 meters.(d)All concrete pavements, base courses in carriageway and shoulders designated for removal, shall be broken to pieces whose volume does not exceed 0.02 Cum.

Unless otherwise specified, the rates of this chapter include tolls and plants and scaffolding required for items of dismantling.

3.The dismantling of structures has been catered both by manual and mechanical means. The estimator can use his discretion depending upon quantum of work and particulars site conditions.

4.Dismantling of Hume pipes has been catered manually as pipes can be easily rolled by men to a suitable stacking place within the right of way.

5.For dismantling of structures, which remain submerged in water, the cost may be enhanced by 50 per cent.6.Dismantling of utilities is required to be done under the supervision of concerned departments with prior information to the users

7.The dismantled materials should be examined and a realistic assessment and provision made after due process for the credit for such materials, which can be utilized for works or auctioned.

8.All minor T & P items required for dismantling are already included in overhead charges.

9.For dismantling of utility services like water pipe lines, electric and telephone lines, prior intimation should be given to users.SECTION - 1

ROADS

CHAPTER : R - 3

NOTES

1.Converting lift into horizontal lead for obtaining the combined lead:(a)Lift shall be measured from the centre of gravity of the excavated earth to the placed earth. This shall constitute the mean lift for the section.(b)For converting lift to lead, lift up to 4.0 meters shall be multiplied by 10 and above 40 meters up to 6.0 meters, it will be squared and multiplied by 3.25 Beyond 6.0 Meters it will be multiplied by 20.(c)No cross lead whatsoever shall be measured for payment.

(d)Leads beyond those included/detailed herein, could be calculated as per chapter R-1.2.Rates for additional lead have been given in a unit of 7.5 meters. If the leads is half of 7.5 meter and more, it will be reckoned as full one lead of 7.5 meters. If the lead is less than 3.75 meters, it is ignored. Carriage beyond 495 meters will be done by mechanical transport and the lead shall be measured in the unit of kilometer. The half and greater than half kilometer shall be reckoned as full kilometer and less than half kilometer shall be ignored.3.Unless otherwise stated in the item, the rates of this chapter do not include pumping/bailing out water of pond caused by springs, sub-soil water, canal, river seepage and broken water mains of drains, however, pumping/bailing out rain water collected in foundation/borrow pit/depression shall not be paid for extra.

4.The classification of excavation shall be decided by the Engineering and his decision shall be final and binding. The intermediate classification, if any, like Pick and Jumper (P.J.)/Jumper and Blasting (J.B.)/Pick, Jumper and Blasting (P.J.B.) etc. shall be paid proportionately.5.The rates of this chapter include ownership, operational, running and maintenance charges of machinery. If the same supplied by the Government, deduction shall be made suitably from the rats.

6.The rates for recently deposited earth work after excavation, will be 50% rates for earthwork in excavation. Earthwork, deposited before monsoon which has had full monsoon on it will be considered as a normal earthwork in excavation.

7.The rates of this chapter include T & P wherever required.

8.In the rate analyses of earthwork, only compacted volume of earth has been considered. 9.Rates have been analyzed for average working conditions.

10.Average achievable outputs of machines have been considered taking into account job and management factors.

11.Cutting by dozer has been proposed where the cut earth can be utilized for filling for embankment within a lead of 100m. A dozer can economically push the earth up to a distance of 100m.12.Where lead for transporting of earth in more than 100m. excavator and tipper have been provided.

13.A water tanker of 6KL capacity which is commonly used at construction sites has been considered.

14.The rates for disposal of unsuitable soil only up to a distance of 1Km. The cost of transportation beyond the initial lead of 1 Km. will be paid separately based on tone-kilometer.

15.In cases where embankment is constructed with earth taken from roadway, the cost of depositing the earth at the earth at the site of embankment is already included in the disposal of excavated earth.16.For narrow and restricted areas, plate compactor has been proposed for compaction to achieve the desired density.17.For small jobs where loading and unloading is required to be done manually, tractor-trolley has been proposed for carriage instead of a tipper.18.In case excavated rock is found suitable for incorporation in work, suitable credit for the available rock shall be given.

19.The possibility of using the blasted rock fragments for backfilling behind structures or backfilling of foundation pits or filling in medians/separators or use in service road shall be examined before proposing disposal of excavated rock.20.In case of hill roads, the cut earth can be pushed down the valley in case there is no objection. In that case, cost of disposal in not required to be provided.

21.For inhabited areas, controlled blasting with limited charge of explosive has been provided. This involves smaller drill holes and additional requirements of electric detonators. Provision has accordingly been made.

22.Any work involved for water courses at culverts (Clause 312) will be priced under respective items, like, excavation, grubbing, clearing, etc. for which rate analyses have separately been made.

23.In the case of embankment made from earth taken from roadway cutting. The input of dozer for spreading earth can be deleted as the same is already provided in the cost of excavation.

24.Earth excavated from drains can be used in roadway berms, hence, carriage for disposal of same is not provided25.In case of rock fill embankment, it is assumed that material is available at site from rock cutting.SECTION - 1

ROADS

CHAPTER : R - 4

NOTES

1.For construction of sub-base, two alternatives as under have been provided :(a)Mix in place method.(b)Plant mix method.2.Although plant mix method has not been provided in the MoRTH Specifications, it is actually being adopted by some of the contractors who are holding the mixing plants to get better quality of mix. It is also found economical as it can achieve much more progress. It is recommended that this point may be kept in view during future revision of specification of sub-base.3.In the case of improvement of sub-grade with lime stabilization, soil is assumed to be available and has not been provided for. Only lime has been catered. In the case of lime stabilization of sub-base, soil has been provided to form the sub-base.4.In the case of medians, separators and footpaths, plate compactor has been catered for compaction due to restricted space.

5.It has been assumed in the case of crushed cement concrete sub-base/base that during the process of dismantling, 25 per cent of aggregates will get segregated and only the remaining will have to be broken/crushed fro dismantled concrete slab portions. Transportation of materials has been catered from place of dismantling to work site. In case, site is the same transportation cost can be deleted.6.Separate for penetration coat over top layer of crushed cement concrete base has been provided, as this item is optional.

7.The quantity considered in the output is the compacted quantity. The quantities of aggregate provided in the rates analysis under the head material are the un compacted quantities.SECTION - 1

ROADS

CHAPTER : R - 5

NOTES

1.Various alternatives for machines and materials have been provided. The one that suits a particulars situation and design may be adopted.

2.That Clauses of MoRTH Specifications, which have been mentioned for each item, may be referred for detailed specifications and construction procedure. (The rate analyses mention only brief description).

SECTION - 1

ROADS

CHAPTER : R - 6

1.In case of prime coat and tack coat, minimum quantities of binder indicated in specifications have been taken, Adjustment, plus or minus, can be made for the variation between this quantity and the actual quantity approved by the Engineer after the preliminary trials.2.The items of bituminous works required under maintenance have been added in the Chapter on Maintenance.3.Tack coat and primer coat, wherever, provided, are required to be measured and paid separately.4.Cleaning of surface is a part of the primer coat and tack coat. As such cleaning of surface has not been provided for bituminous courses as the same is already catered in prime/tack coat. However, for those cases where such coats are not required to be done, cleaning of surface shall be included.5.It is presumed that tack coat, where required, will be provided immediately preceding the bituminous layer.6.Rolling of bituminous courses is required to be done as per Clause 501.6. Provision in the analyses has accordingly been made. It has been observed during actual practice at work sties, that the availability of road roller is generally inadequate. As compaction is the key to good construction, this point is being specifically to ensure that road rollers are deployed at site as per provision in the rates analyses.

7.Spreading of bituminous materials shall be done by mechanical means except in areas where a mechanical paver cannot have access.8.The source of all materials to be used on the project must be tested and expressly approved by the Engineer.

9.Quantities of materials taken in the analyses are for the purpose of cost estimate only. The actual quantity shall be as per job mix formula.

10.Choice of grade of bitumen shall be made as per the guidelines given in Appendix-4 of MoRTH Specifications.

11.The specification and requirements for modified binder with various type of modifies have been laid down in Clause 521 of MoRTH Specifications and IRC: SP: 53-2002 which shall be followed.12.The guidelines given vide Annexure-A to Clause 501 of MoRTH Specifications in regards to protection of environment shall be followed for a particular situation.

13.The quantities taken as output of the item in the rate analysis are the compacted quantities and the quantities of aggregates taken under the head 'material' are the un-compacted quantities for the procurement purposes. 14.The approximate proportions by weight of different aggregates and bitumen (or by value in unavoidable cases) necessary to produce the intended mix satisfying the job requirements and meeting the designated specifications are for estimating purpose only. The actual quantities should be worked out on the basis of job mix formula adopted for the job after working out the same in the laboratory for particular aggregates and bitumen approved by the Engineer.SECTION - 1

ROADS

CHAPTER: R - 7

1.Kerb stone laying and road marking has been provided for lying by mechanical means.2.Back filling of foundation of boundary pillars has been proposed with stone spells, tightly packed and compacted.3.For metal beam crash barrier, a 'W' shaped beam of size 311 x 83mm. flange width made with structural steel corrugated plate 3mm thick and having a length of 4.5 m has been provided, over a channel post of 150 x 75 x 5mm. with a spacer of channel section 150 x 75 x 5mm, 330 mm long.4.Two supports have been provided for direction and place identification signs where size is more than 0.9 sqm. Only one support is provided for size up to 0.9 sqm.

5.The traffic signs proposed are of retro-reflectories type made of encapsulated lens type reflective sheeting fixed over aluminum sheeting as per Clause 801.3 and installation.6.The size, location of traffic signs shall be as per IRC:67.

7.Provision has been made for a crane for installation of overhead signs.

8.The organization and financial aspects are required to be finalized in constitution with administrative and traffic authorities.

9.Ducts for Utility Services along and Across the Expressway/Highway:-The running meter cost of duct along the road including inspection chambers (where applicable) or across the road will depend upon the approved design. The various item involved are earthen work, plain cement concrete, brick stone masonry, reinforcement cement concrete, from work, steel reinforcement, laying of pipe line (where duct is of pipe and cast iron/RCC cover for the inspection chamber. The rate for these items are available under respective clauses which can be applied a running meter cost of duct worked out as per the approved design and drawing for particulars situations. In case cast iron cover for the inspection chamber, the rate can be ascertained from the market for the size provided in the design and approved drawings.19.Noise Barriers:-

Noise barrier can be provided in the form of a brick wall of a suitable height as per the site requirement and approved design. The items involved for the construction of this barrier like earthwork, brick masonry, plain cement concrete, etc. are available in the Data Book, which can be applied to arrive at the cost of noise barrier based on the design adopted.

Alternatively, wherever space permits, cluster of trees, shrubs and plant can be grown by the roads side 6m away from the edge of the roadway. This will intercept the annoying sound waves and fumes from road vehicles.SECTION - 1

ROADS

CHAPTER: R - 8

NOTES

1.In the case of rain cuts, it has been assumed that some material cut by rain, approximately 25 per cent, will be available at site which can be retrieved and re-used and the balance 75 per cent is required to be provided as frees material.

2.For making up earthen shoulders, it has been assumed that on an average 150mm filling will be required. Similarly, for striping of excess soil from the shoulder, an average depth of 75mm. has been assumed.

3.In the case of chocking of drain, it has been assumed that half the depth of drain has been filled with earth/debris, which required clearance.

4.During the process of landslide clearance on hill roads, it has been assumed that earth will be disposed off by the dozer on the valley side. In case there is any objection to this arrangement due to particular site conditions, resources like loader and tipper will have to be provided for disposal of earth/debris for the lead involved.

5.Pot-hole repair and patch work are provided to be done by mechanical means.SECTION - 1

ROADS

CHAPTER: R - 9

NOTES

1.The analysis of rates for grassing of lawns and hedges has been included, as the same may be needed for resting places on highways.

2.Five types of tree guards as under have been provided:

(a)Half brick circular type.

(b)Tree guards made from empty bitumen drums 1.30m high.

(c)Tree guards made from empty bitumen drums 2.00m high.

(d)Tree guards with MS flat iron.

(e)Tree guards with MS angle and 3mm steel wire welded on MS flat and bolted to angle iron posts.

Selection from above may be made as per actual situation and design.

3.Analysis of rates for wrought iron and mild steel welded work has been included to cater for any miscellaneous work in connection with horticulture, fencing and traffic sign.4.Though the estimate for compensatory a forestation is made by the forest department, the rate for this item has been analyzed and include for the purpose of estimation.SECTION - 1

ROADS

CHAPTER: R - 10

NOTES

1.Pipe culverts of size 1000 mm and 1200 mm dia in single row and double row which are generally used on roads, have been included. Only lying of pipe has been included in the rate. Auxiliary works such as excavation, backfilling, concrete and masonry shall be paid for separately, as provided under the respective clauses.2.The choice between first class bedding and cement cradle bedding will depend on particular situations and the approved design.3.The jointing of pipes is proposed by collar joints.

4.Backfilling up to 300mm above top of the pipe shall be carefully done and the soil thoroughly rammed, tamped or vibrated in layers not exceeding 150mm.

5.Head walls and other ancillary works shall be cost under respective clauses.

6.The height of filling above the top of pipe shall not be less than 600mm.SECTION-2

BRIDGES

BASIC APPROACH FOR PREPARATION OF THE RATE ANALYSIS FOR BRIDGES

While preparing the analysis of rates for items to be adopted in bridge projects, the general approach adopted has been as under:-1.Bridges projects may be categorized in two basic types. The first page comprises of isolated projects or where the type of superstructure does not fall under an important category. The second type of projects is where the state-of-the-art type of machinery is deployed and the quality assurance is also of a higher grade. In this type not only individual bridge/flyover projects of big magnitude are covered, but also bridges of relatively smaller length which form part of a big project being implemented with the latest type of machinery and of specifications, are covered.

2.The overhead expenses included in the rates cover the following: General site amenities including labour benefits and labour accommodation, stores, site establishment, quality control and site supervision by the contractor, water supply, electricity, insurance, minor T & P expenses, sales tax on turnover etc........3.For externally added projects, the Ministry of Surface Transport has brought forth a set of revised specification earmarked as 'N' which is proposed to be followed for important and major works while for work of lesser category the existing specification with lesser input of machinery would be adopted. The items have accordingly been categorized.4.The nomenclature is brief and linked with relevant provisions of Ministry of Surface Transport Specifications with the Specifications of the purpose of interpretation during various stages of execution of the project.5.For various types of superstructures and conventional types of substructure and foundation, the component of the formwork has been given in percentage form and has been included in the cost given herein, which can be adopted for general use. For special works like slip form shuttering, shuttering for cantilever construction, pre cast construction, incremental launching and truss type of centering/staging etc., rate would have to be analyzed.

6.The rates include the element of testing of samples of various materials brought for use on the work as well as other tests for various items of work.

7.In view of the above and the provision of additional input for controlled concrete, no further provision for quality control may be necessary in the estimates.8.Unless otherwise specially mentioned and provided in the schedule, the rates include the cost of carriage, loading and unloading, disposal of surplus material within a lead of 1000 meters, stacking of materials required for the work etc.

9.Rates include provision of necessary device and other arrangements, etc. for traffic control but do not include construction and maintenance of temporary diversion. Provision of service roads/access to various locations in the area of the site has been accounted for in the overheads.10.In the items for well foundation nominal provision for islanding/temporary protection has been made. For elaborate type of islands with well-planned protective measures, coffer dams etc., special analysis is called for.11.Specific rates/tenders shall have to be called for:-

(a)Pneumatic sinking of wells.(b)Applying epoxy mortar over leached, honeycombed and spelled concrete surface and exposed steel reinforcement.

(c)Providing anti-corrosive treatment to HYSD reinforcement wit Fusion Bonded Epoxy Coating.

(d)Strip seal type of expansion joint with fatigue tested structural section at the nosing and anchorage assembly.

SECTION - 2

BRIDGESCHAPTER: R - 11

NOTES

1.Excavation for structures has been provided both the manual and mechanical means. The rate relevant to a particular situation may be adopted.2.The earth excavated from foundation has been proposed to be backfilled and balance quantity utilized for road work locally except for marshy soil where disposal has been provided.3.The rock foundations are required to be prepared which has been analyzed.

4.In case of rocks, excavation has been considered up to a depth of 3m. only.

5.Embedment of foundation in soft and hard rocks has been provided as required by the specifications.6.Dewatering has been provided in excavation for foundation. In case dewatering is not required for a particular site condition, the same may be omitted.

7.Mixing of cement concrete has been considered both by using concrete mixer and batching plant. The rate can be adopted depending upon availability of equipment and as approved by the Engineer.8.Contractor batching plant is generally placed within one Km of the bridge site. In case of longer lead, transportation cost may be worked out based on tonne km.

9.The coarse and fine aggregate for cement concrete shall be as per IS: 383.

10.Description of items has been given very briefly. Relevant clauses of MoRTH Specifications may be referred for detailed specification.

11.Steel reinforcement for cement concrete works is required to be provided separately. The rate for the same has been analyzed.

12.Necessary safety precautions shall be taken for excavation on open foundations for which guidance may be taken from IS: 3764.13.A leveling course of 100mm. thickness in M-10 (1:3:6) shall be provided before lying open foundations.

14.In the case of open foundation, dewatering shall not be permitted from the time of placing of concrete up to 24 hours after placement.

15.In case of open foundation in rock, the trenches around the footing shall be filled-up with concrete of M-15 grade up to a level of 0.6m for hard rock and 1.5m for soft rock above the foundation level. The portion above this may be filled by boulders grouted with cement.16.When there are two or more compartments in a well, the lower edge of the cutting edge of the middle stems of such wells shall be kept about 300mm above that of outer stems to prevent rocking.SECTION - 2

BRIDGESCHAPTER: R - 12

NOTES

1.Although, Substructures are generally constructed in cement concrete, the rate analysis for brick and stone masonry in CM 1:3 have also been included which can be adopted if permitted by design.2.The cost of formwork will very with the height of the substructure. Provision has accordingly been made.3.As the higher grade of concrete is costlier, the provision made for formwork on percentage basis has been suitably adjusted to make it comparable with other grades.4.Bridge bearing, being commercial items produced by specialized firms with imported technology and parts, the rates for the same are required to be ascertained from the market for the approved design and technical specifications.5.Filter media and backfilling behind abutments are required to be provided as per guidelines given in IRC 78-2000.6.Weep holes shall be provided as per Clause 2706 of MoRTH Specification.

7.In case of roller-cum-rocker bearing, only full circular rollers are to be provided.

8.All bearing shall be set truly level so as to have full and even seating.

9.For electrometric bearing pads, the concrete surface shall be leveled such that the variation is not more that 1.5 mm form a straight edge placed in any direction across the area.10.The bearing should be procured only from those manufactures that have been pre-qualified by the Ministry of Road Transport and Highways.

11.The bottoms of girders resting on the bearing shall be plans and truly horizontal.12.For spans in grade, the bearing shall be placed horizontal by using sole plates for suitably designed RCC pedestals.SECTION - 2

BRIDGESCHAPTER: R - 13

NOTES

1.The rate for the wearing coat has been analyzed as under: (a)Cement concrete wearing coat.

(b)Ashphaltic concrete wearing coat.

(c)Bitumen mastic wearing coat.

The items may be selected as per approved design. In case the thickness of wearing coat is different from the analyzed, the rate for the desired thickness may be worked out on pro-rata basis.2.The rate analysis has been done both for RCC railing and M.S. Railing, which can be adopted as per approved design.3.The length of drainage spout has been provided in such a way that it is connected to the structure in case of bridges.4.The rate for anti-corrosive treatment is required to be ascertained from firms specialized in this work. In this connection Circular No. RW/NH-3401/44/91-S&R dated 21.03.2000 of Ministry of Road Transport and Highways may be referred for further details.

5.Expansion joints involving movements exceeding 40mm are specialized ready made items commercially produced by reputed firms with imported technology and parts. The rates for such joints are required to be ascertained from the firms pre-qualified by the Ministry.

6.The rate analysis for per-cat and pre-tensioned girders has also been included.

7.The rate analysis for pre stressed cement concrete of M-60 grade has also been included which can be adopted for bridges with innovative design/construction.8.MoRTH letter No. RW/NH-34059/1/96 S&R dated 30.11.2000 and subsequent corrigendum dated 25.01.2001 may be referred for detailed specifications and provisions for various types of expansion joints.9.Supply of new type of expansion joint may be obtained on the basis of competitive bidding from amongst the suppliers pre-qualified by the Ministry of Road Transport and Highway. Further, a warranty of 10 years of trouble free performance may be insisted from the suppliers.

10.For bridges having wide deck/span length of more than 120m or/and involving complex movements/rotations in different directions/planes, provision of special type of modular expansion joints such as swivel joists joints are required for which firms specialized in this field may be consulted. Such cases will require prior approval of Ministry.SECTION - 2

BRIDGESCHAPTER: R - 14

NOTES

1.Three types of aprons on riverbed as under have been catered.

(a)Boulder apron lay dry.

(b)Boulder apron lay in wire crates.

(c)Apron laid in cement concrete blocks on M-15.

2.A toe wall for protection to pitching can be either in dry rubble masonry (un coursed) or in nominal mix cement concrete M-15. Depending upon the design, the rates may be adopted under respective clauses.

3.Flooring has been proposed in dry rubble stone, rubble stone lay in CM 1:3 and with cement concrete blocks M-15.

4.Curtain walls proposed are of following two types:

(a)Course rubble stone masonry (1st sort) in CM 1:3.

(b)Cement concrete M-15 grade.

5.The rates analysis for gabion structures comprising of stone boulders laid in wire crates have been included. Such structures are suited as retaining structures and for corrosion river training works especially for situations where some settlement of foundation in anticipated. These structures can adjust in minor settlements, being flexible structures, without losing their functional requirements.SECTION - 2

BRIDGESCHAPTER: R - 14

NOTES

1.Three types of aprons on riverbed as under have been catered.

(a)Boulder apron lay dry.

(b)Boulder apron lay in wire crates.

(c)Apron laid in cement concrete blocks on M-15.

2.A toe wall for protection to pitching can be either in dry rubble masonry (un coursed) or in nominal mix cement concrete M-15. Depending upon the design, the rates may be adopted under respective clauses.

3.Flooring has been proposed in dry rubble stone, rubble stone lay in CM 1:3 and with cement concrete blocks M-15.

4.Curtain walls proposed are of following two types:

(a)Course rubble stone masonry (1st sort) in CM 1:3.

(b)Cement concrete M-15 grade.

5.The rates analysis for gabion structures comprising of stone boulders laid in wire crates have been included. Such structures are suited as retaining structures and for corrosion river training works especially for situations where some settlement of foundation in anticipated. These structures can adjust in minor settlements, being flexible structures, without losing their functional requirements.APPENDICES

SECTION - 2

BRIDGESCHAPTER: R - 15

NOTES

1.Removal of cement concrete wearing coat and asphaltic wearing coat has been proposed with pneumatic breakers. 2.The rate for external prestressing has been analyzed for three different spans of 25,50 and 100m. 3.Sealing of cracks has been proposed with cement grout, cement mortar (1:1) grout and epoxy grout by injecting with grout pump through nipples.

4.The repair and replacement of following structures has been included. a) Bridge Bearing b) Expansion Joints

c) Concrete Railing

d) Mild steel Railing

e) Crash barrier

ROAD MATERIALS

&

THEIR CARRIAGE

SITE CLEARANCE

EARTH WORK, EROSION CONTROL

& DRAINAGE

GRANULAR SUB-BASE

BASES AND SURFACE COURSE (BITUMINOUS)

BASE COURSE

TRAFFIC SIGNS, MARKING & OTHER

ROADS APPURTENANCES

MAINTENANCE OF ROADS

HORTICULTURE

CULVERT

FOUNDATIONS

SUBSTRUCTURE

SUPER STRUCTURE

RIVER TRAINING AND PROTECTION

WORK

RIVER TRAINING AND PROTECTION

WORK

REPAIR AND REHABILITATION