BARC (V)/CES/Tunnel/128 Dated 18.08.2023

Amount

General Notes Applicable to all BOQ Items

1) The make/model/brand for all the BOQ items shall be as per suggestive makes of Annexure-B of Section-VII of the tender document. The make/model/brand mentioned in Annexure-B of Section-VII of the tender document is merely for guidance and bidders can prefer any other make which is meeting technical specifications given under Section-V and Schedule of Quantities of Tender document and shall confirm to the relevant BIS codes and other relevant codes. However, the bidder may suggest any equivelent make/ model/brand meeting technical parameters on or before pre-bid conference for approval of BARC(V). 2) Only sieved river sand/crushed stone sand confirming to Zone-II from Godavari river or Varaha river or Vamsadhara river or Sarada river or Nagavali river / Crushed stone sand shall be used as fine aggregate and Graded hard broken granite metal of 3 stage (VSI) material shall be used as coarse aggregate in relevant items. Specification for fine and coarse aggregate shall confirm to IS:383 (latest revision) 3) In view of limit on water-cement ratio for durability requirements in design mix concrete, concrete admixtures (Carboxylate based superplasticizers) can be used after taking prior approval of Engineer-in-Charge and the rates quoted for concrete items shall be inclusive of the cost of admixtures, Design mix, trial mixes, testing (at site & at approved labs), etc. complete. 4) The contractor shall set up sufficient number of self loading mobile concrete mixers inside the project area for the production of concrete.

5) Contractor may also be allowed to procure concrete from prior approved RMC plants on prior approval of the BARC subject to maintain required slump at site during pouring.To that extent suitable Mix Design should be carried out with required retention period. No extra payment will be made if concrete is brought from RMC plants outside the project area. 6) Manufacturer's Test certificate of cement which is procured from dealer/company is to be submitted for all cement related works by the contractor. 7) The Scope of works which are not included in any specific items but indicated in the document "General Scope of all works" shall be within the scope of overall contract works. The cost of work/item/material indicated in this document shall be deemed to be included in the quoted rates of all individual items. 8) The quoted rates shall include necessary royalties, seigneiorage charges,etc. and all other charges to supply all the required construction materials.

9) For all standards and code of practices, specifications, like Indian Standard, MORT&H, ASTM, etc. refer only latest revisions including all applicable amendments, revisions and additional publications (during contract period) and these have to be followed. 10)Prior approval for source of all construction materials by submission of relavent test certificates, documents, invoices etc. have to be taken from BARC. 11) All the tests mentioned in Quality Assurance Plan(QAP) should be carried out without any extra cost. 12) The contractor has to submit all royalty /seigneiorage slips,etc for all the naturally available construction materials before submitting the RA bills.

General Notes for Earth Work Excavation: Note : The rate quoted for earth work excavation by contractor is deemed to have included the following points (a) to (j) a) removal of all kinds of vegetation, small shrubs, light/heavy jungle, trees etc., alongwith roots, including disposal/stack in the identified location. b) shoring, strutting, stepping, dressing, grading required for keeping the earth in position on sides of trenches with approved timber/steel accessories wherever necessary to prevent sides from falling including bailing or pumping out of water if necessary including removal of debris/unserviceable materials and excavated excess soil, if any. c) dewatering of both ground and surface water, including removal of slurry generated while excavation and keeping the area free from water, to be let out of the building area through proper pipes & channels if required by suitable pumps, d) watering, ramming and thoroughly consolidate the bottom of all excavations & ground before the construction of foundation/footing/plinth beam, filling in basement or other work is commenced.

e) the loose pockets shall be excavated and compacted after back filling as directed by Engineer-in-charge, as per detailed specification and conforming to safety rules during progress of the work. f) Contour levels to be taken jointly with the Engineer-in-charge and prior written approval be taken before starting any excavation/ filling at every 3 m grids for arriving at the actual quantity, g) Backfilling will be done in layers of thickness as specified below. h) Cost inclusive of necessary royalties, seigneiorage charges and other charges to supply all the required construction materials, i) cost of items shall include all labour charges, hire charges of machinery, lubricants, fuels and tests etc. j) Measurement/Payment will be reststicted to PCC/drawing dimensions only.

0 to 1.50 m depth from Average Ground Level

1.5 to 3.0 m depth from Average Ground Level

3 to 4.50 m depth from Average Ground Level

4.5 to 6.0 m depth from Average Ground Level

6.0 to 7.5 m depth from Average Ground Level

7.5 to 8.5 m depth from Average Ground Level

PCC, RCC & FORM WORK Notes: 1) Rates quoted for PCC & RCC items shall include cost of sieved river sand/ crushed stone sand as fine aggregate and graded hard broken granite metal of 3 stage (VSI) material as a coarse aggregate. 2) The mix shall be desiged to maintain the desired slump (as required at site/specified in IS code). In view of limit on water-cement ratio for durability requirements in design mix concrete, admixtures (corboxalite based superplasticizers) can be used after taking prior approval of Engineer-in-Charge and the rates quoted for the items shall be inclusive of the cost of admixtures, trial mixes, testing (at site & at approved labs), etc. complete. 3) The contractor shall set up sufficient number of Self loading mobile concrete mixers inside the project area for the manufacture of concrete. 4) Contractor may also be allowed to procure concrete from prior approved RMC plants on prior approval of the BARC subject to maintain required slump at site during pouring. To that extent suitable Mix Design should be carried out with required retention period. No, extra payment will be made if concrete is brought from RMC plants outside the project area. 5) The rate of concrete shall include all labour, equipment, charges for mixing & cost of admixtures. 6) Test certificate of cement, procured from dealer/company has to be submitted for all concrete works by the contractor. 7) Rate quoted for RCC items shall include cost of relevant design mix and testings.

8) This item is applicable for all PCC and RCC structural elements like footings, beams, columns, slabs, lintels, chajjas, walls etc., for all heights and leads. 9) Only steel scaffolding, staging, supporting system to the formwork and steel frame work will have to be used for all RCC structural elements. 10) All surfaces adjacent to EPs, etc., shall be in true line and level & irregularities, if any, shall be rounded by mechanical grinding, chiseling, finishing the same using epoxy silica sand mortar at no extra payment. 11) Form finish F3 shall be provided to all exposed surfaces of the concrete.

Providing and laying in position cement concrete of 1:3:6 (1 cement, 3 crushed sand, 6 graded stone aggregate of maximum size 20 mm) including consolidation, finishing, curing etc. complete as per specificationsand drawings but excluding the cost of Form work shuttering, centering Complete at all levels

Providing and laying in position Reinforced Cement Concrete (RCC) of grade M-30 using 20mm maximum size aggregates and crushed sand of approved quality including admixtures of approved brand and quality (plasticiser or super plasticiser) if required, including weigh batching, mechanical mixing, transporting, placing, vibrating, consolidation, finishing, curing etc. complete but excluding the cost of centering, shuttering and reinforcement complete as per specifications up to Plinth Level.

Providing, centering, shuttering Form work using steel plates, timber planks for all types of structures including necessary strutting, proping, staging, supports, bracings etc. and deshuttering the same after the specified time all as per drawings, specifications and as directed by the Engineer-in-charge at all levels.

Notes for Reinforcement steel: 1) 1.2mm dia annealed GI coated (20 micron to 40 micron) binding wire required for the work will have to be supplied by the contractor at their own cost and will not be measured for payment. 2) Fe-500D / Fe-500EQR bars as per IS to be supplied by the contractor. 3) Reinforcement bars from conversion agents / re-rollers of above manufacturers, will not be accepted. 4) No extra payment will be made on account of Rolling Margin & wastage. 5) Contractor shall supply copy of the documentry evidence of purchase of steel, test certificate from these manufacturers and also test from third party to be carried out at no extra cost.

Providing Reinforcement steel of all diameters for reinforced cement concrete at all levels. including supplying, preparation of bar bending schedules, cutting, bending, transporting to all elevations, placing and keeping in positions, all leads, fixing, tieing with 1.2 mm dia annealed GI coated binding wire including all labour charges, cost of cover blocks (in same grade of concrete) of various thicknesses and sizes etc. all as per drawings and technical specifications and as directed by the Engineer-in-Charge. Using TMT Bars of Specified Grades of all sizes. TMT bars to be supplied of grade - Fe 500D / Fe-500EQR.

Making a tunnel/shaft to accomodate 2.0m diameter RCC hume pipe using Horizontal Directional Drilling method (manual / mechanical)/other equivalent approved method to through a specified alignment/direction of required length at a depth of about 8.0 metres from the original ground level complete all as per technical specifications enclosed. The rate quoted shall include drilling through all kinds of soils/soft rock/hard rock including chisseling, removal of muck, dewatering etc. The rates quoted shall also include installation of RCC hume pipes along the specified direction, all equipments including hydraulic jack, moulds for pushing the pipes etc, men, materials, tools & tackles etc all complete. Notes: 1) Rates are inclusive of all leads up to 200 m and lifts at all levels for excavated/drilled material 2)The contractor shall make necessary arrangments for sufficient lighting and ventilation during drilling and excavation. 3)Item shall be executed as per Technical Specification and relevant IS codes. 4)Construction safety shall be ensured as per Construction Safety manual and as per IS 5878. 5)Payment for RCC Hume pipes will be paid under relevant item.

Providing and laying of RCC Pipe Culverts using 2.0 m Dia NP4 class RCC Hume pipes as per relevant IS code with spigot and socket jointed with stiff mixture of cement mortar in the proportion of 1:2 from inside , laying to the levels, slopes and all as per drawings specifications and as directed by Engineer-In-charge. Cost including materials and labour. including hoisting, placing in position by manual or mechanical means & setting up of culverts and pipe crossings complete.

Providing and constructing 300mm/450mm/600mm (or as directed) thick masonry at all elevations with approved quality Fly ash/ FAL-G bricks (confirming to IS 12894) having minimum crushing strength 60 Kgs/Sq.cm and water absorption of maximum 20%, in cement mortar 1:4 (1 cement : 4 river sand/ crushed stone sand) uniformly mixed in machine with approved 'non-shrinking compound' as per manufacturer’s instruction in specified courses of approved bond also providing horizonatal RCC band of 100mm/150mm/200mm x 100 mm (or as directed) at about 1.00 m c/c with 2 nos. 8 mm dia Tor bars and 6 mm dia links at 300 mm c/c in cement concrete (1:2:4), required formwork, complete including pointing, raking out joints, curing, cleaning, including independent double legged scaffolding, at all heights, depths and leads, dewatering area where required etc., all as per typical drawings, Technical specifications and as directed by the Engineer-in-charge. Note for flyash bricks: In the fly ash bricks the mix confirming to the strength mentioned in the respective items shall be got approved by the department. The mix shall consist of ordinary portland cement content of not less than 20%(preferably) of the mixture consisting of Fly ash, OPC and Gypsum or any variation in proportion of design mix shall be submitted to BARC for approval. The Anhydraous Gypsum, Fly Ash, Cement, Crusher dust and other materials shall confirm to the relevant IS codes. The Anhydrous Gypsum shall be procured from a reputed source approved by the department. Roller mixer shall be used for good homogeneous mixing. a) Reinforcement will be measured & paid for separately under relevant item. b) RCC band and formwork shall not be measured seperatly, however no deductions will be made in brickwork for the same. c) No holes in brickwall will be allowed for scaffolding. Only double tubular steel scaffolding be allowed.

Providing 15 mm thick plaster in cement mortar 1:4 without cement punning (using River Sand/Crushed Sand) finished smooth, including sieving of sand to required fineness, preparation of the surface, scaffolding, curing all as per specifications, drawings and as directed at site complete.

Providing Structural steel work Up to and including 300 mm Joists, 350 mm channels, and below sections using angles, channels, joists and other sections, welded and / or bolted including in built up sections for ladder and other structures including supplying, cutting, drilling, welding, fabricating, hoisting, fixing in position, applying a priming coat of zinc chromate steel primer etc., complete all as per drawings and Technical specifications and as directed by the Engineer-in-Charge. Notes: 1) Structural steel required for the work shall not be supplied by the Department. 2) Structural steel confirming to IS 2062 shall be supplied from their own plants rolled from virgin materials to be procured directly or from their authorised dealers and test cerificate to be produced. 3) The contractor shall supply documentary evidence of purchase of steel, Test certificate from approved manufacturers and also third party testing from approved laboratories with out any extra cost. 4) Welding weights, connections, bolts and nuts shall not be measured for payment but the cost of which shall be deemed to have been included in the rates. 5) Holes to be drilled only by Drilling machines and gas cutting of holes are not permitted. 6) Rate inclusive of all consumables like gas, welding electrodes and tools and tackles etc. 7) The Liquid Penetrant Inspection shall be carried out in 1% of the total joints and as directed by Engineer-in-Charge without any extra cost.

SEKAR CONSTRUCTIONS