manufacture, fabrication, inspection, testing and supply of door lowering racks with electrics supply of door lowering racks with electrics (pkg. no. sm-415) required for rebuilding of coke oven battery no. 6 at sail, bokaro steel limited, bokaro, jharkhand. , fabricated/cast items:- take up device, rack frame, bottom support, top support, end support, pulley set etc. as per bom (item no. 2 to 8) in drg. no. mec/s/e254/a/10/c1/0426/001 and as detailed in ts. , drive unit:- winch consisting of motor, coupling, break, gear box, clutch, pawl & ratchet assly., rope drum, base frame etc. (technical specification as mentioned in drg. no. mec/s/e254/a/10/c1/0426/001 (item no. 1, estimated quantity=1600kg) and as detailed in ts) , rope dia. 20 (technical specification as mentioned in drg. no. mec/s/e254/a/10/c1/0426/001(item no. 9)) , rope dia. 12 (technical specification as mentioned in drg. no. mec/s/e254/a/10/c1/0426/001(item no.10)) , motor control panel – free standing, floor mounted, non-draw-out type, modular construction in sheet steel enclosure with ip class – ip-55. , dc electromagnetic brakes complete with brake panel in 2.0 mm thick sheet steel enclosure, enclosure protection ip-55, structure mounted type. , local control station / post for door lowering rack in stainless steel enclosure with canopy, ip – 55 with pushbuttons for emergency stop, alarm, hoisting & lowering. , power junction boxes (300 x 300 mm) in stainless steel enclosure with canopy - ip - 55 , power junction boxes (200 x 200 mm) in stainless steel enclosure with canopy - ip - 55 , limit switches – heavy duty, industrial type - ip-65 generally with 2no+2nc contacts: , rotary limit switch for coke and pusher side , limit switches for vertical and horizontal positions for coke and pusher side , rope slack limit switch , roller lever limit switch for top lock pin interlocking for coke & pusher side , electronic hooter , lt power & control cables: , 4c x 10 sq.mm , 4c x 6 sq.mm , 14c x 2.5 sq.mm , 10c x 2.5 sqmm. , 3c x 2.5 sq.mm , gi cable trays of following sizes: , 300 mm , 100 mm , gi strip for earthing: , 50 x 6 , 25 x 3 , termination kit including lugs, ferrules, double compression glands etc. for cables. , note: 1. items to be supplied as specified in the t.s./drawings. all bought out items shall be as per preferred makes mentioned in ts (apendix-a). 2. quantity mentioned above is only an estimated quantity & may undergo change as per operational requirement & site execution. 3. bom shall be operated on unit rate basis. 4. units rate shall be quoted for all the above items for any additional requirements/ decrease in requirements. the contract value may get altered on account of increase/ decrease in the respective quantity of various items. 5. unit rate shall be firm & binding till completion of the project & handing over to employer.