Bhabha Atomic Research Centre Tender

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.

Clearing Jungle including uprooting of rank vegetation, grass, brush wood, trees and saplings of girth up to 30 cm measured at a height of 1m above ground level and removal of rubbish up to a distance of 50 m / outside the periphery of the area cleared as per specifications and as directed by the Engineer-in-charge

Earth work excavation from 0.00m to 1.50m below average GL by mechanical means (Hydraulic excavator) / manual means in foundation of culverts or any other structure etc., in all types of soil other than soft and hard rock, dressing the sides of foundation, ramming of bottom of foundations etc. including shoring, strutting and dewatering and refilling around foundations and plinth with selected excavated earth in layers of not more than 500 mm thick, each layer well rammed and consolidated including disposing the surplus earth within a distance of 200 m all as per specifications including clearing jungle,uprooting of vegetation, grass, etc.complete all as per as per drawings, specification and as directed by the Engineer-In-charge.

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. 12) The design and drawings of formwork shall be submitted alongwith calculations for approval before commencement of work.

Providing and laying in position cement concrete of 1:3:6 (1 cement, 3 river Coarse river sand/ crushed stone sand, 6 graded stone aggregate of maximum size 20 mm) at all elevations including for roads. Cost includes consolidation, finishing curing etc. complete all as per drawings and technical specifications and as directed by the Engineer-in-Charge but excluding the cost of form work shuttering, centering all as directed by Engineer-in-charge.

Providing and laying design mix reinforced cement concrete of M20 Grade by weigh batching using graded stone aggregate of 20 mm max. size and coarse river sand/ crushed stone sand of approved quality at all elevations including admixtures of approved Brand and quality, including handling & transportation, scaffholding, mechanical mixing, placing to required location by hoisting and / or pumping & mechanical vibration, consolidation, finishing, curing, hacking of concrete surfaces wherever required etc. complete at all levels in substructure/superstructure as per specifications & also including dewatering, if any, complete all as per drawings and technical specifications and as directed by the Engineer-in-Charge but excluding formwork, shuttering and steel reinforcement.

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 by the contractor. General Notes for Reinforcement steel: 1) 1.2mm dia annealed GI coated 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, 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.

Providing and fixing G.I.Barbed wire 2 ply 12 SWG, 4 spikes of minimum weight of barbed wire 9.38 kg per 100 metres (min) fixed to existing angle iron posts , with G.I. bolts and nuts , "J" hooks, ,GI staples, GI wire on fencing with angle iron post placed at required distance, embedded in cement concrete blocks, every 15th post, last but one end post and corner post shall be strutted on both sides and end post one side only, provided with eight horizontal lines and two diagonals of barbed wire 9.38 kg per 100 metres (min) between the two posts fitted and fixed with G.I. staples on wooden plugs or G.I. binding wire tied to 6 mm bar nibs fixed while casting the post all complete as per direction of Engineer In charge. Payment to be made per metre cost of total length of barbed wire used. Cost of RCC posts, earth work and concrete to be paid for separetely under respective item.