Tender For Routine Maintenance Of 17 Nos 40 Metre Ground Based Mobile Tower And 2 Nos 15 M Rtt Under District 24 Pgs South Of Kolkata Ssa Joynagore Sub Division.; 1 Welding by gas or electric plant including transportation of plant at site etc. complete. 2 Steel work welded in built up sections/ framed work, including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer using structural steel etc. as required. 3 In gratings, frames, guard bar, ladder, railings, brackets, gates and similar works. 4 12 mm cement plaster of mix : 5 1:4 (1 cement: 4 fine sand) 6 Providing, mixing and applying bonding coat of approved adhesive on chipped portion of RCC as per specifications and direction of Engineer-In-charge complete in all respect. 7 Epoxy bonding adhesive having coverage 2.20 sqm/kg of approved make. 8 Providing, mixing and applying SBR polymer (of approved make) modified Cement mortar in proportion of 1:4 (1 cement: 4 graded coarse sand with polymer minimum 2% by wt. of cement used) as per specifications and directions of Engineer-in-charge. 9 Note: Measurement and payment: The premeasurement of thickness shall be done just after the surface preparation is completed and Payment under this item shall be made onlyafter proper wet curing has been done and surface has been satisfactorily evaluated by sounding / tapping with a blunt metal instrument and/or the 75mm size cube crushingstrength at the end of 28 days to be not less than 30 N/Sqmm2). 10 25 mm average thickness in 2 layers. 11 Conveyance for supervision and inspection of works : Distance basis AC taxi hiring services vehicle tupes-Swift Dzire,sedan or similar usage veriant -1000 kmx 160 hours. 12 Labour for tightening of all the nuts and bolts ,washers and spring washers of towers i/c mounts, platforms, vertical cable tray, horizontal Cable tray ,climbing ladders etc all with Torque wrench etc including pasting of zinc rich paste wherever galvanised coat has peeled off etc all complete and as per the directions of the Engineer-in-charge.Note :- The rate of this item shall include the cost of all labour for fixing of new nuts & bolts, missing members, T&P, torque wrench, other equipments etc required for all operationsspecified above i/c scaffolding, safety belt, insurance of labour etc. However cost of nuts & bolts & any missing members will be paid separetely). 13 40M height ground based tower 14 15 m RTT 15 Supplying at site galvanised steel high density nut & bolts washers etc [MISSING / UNAVAILABLE ONLY] with average mass of zinccoating of 610 gm/Sqm (approximately 85micron), members bolts & nuts, washers fabricated as specially instructed and as per approved drawings and specifications for erection of equivelent tower. The galvanising shall be as per IS: 4759. The structural steel fortower shall confirm to IS: 2062 and fabrication shall be as per IS: 4757. The structural steel section shall be procured from the main producers like SAIL, RINL, TISCO. In case,structural steel sections from secondary producers are permitted, the same shall be restricted only from secondary producers of repute such as PARAS, SRMB, BABA or havingvalid BIS certification and POWER GRID approved conforming to all relevent IS specifications and as approved 16 by the Engineer-in Charge. (The rate includes cost of all operations as above including carriage of all galvanised steel materials from source of procurement to the site of work). Note:- 1 All steel materials shall be made from M.S. high density structural members like angles, flats, round/ square bars, tees, channels, gusset plates, joints, rivets, G.I. Pipes, bolts & nuts, washers etc. Nothing extra shall be payable for special fabrication, erection and fixing of the above steel built up section in position at any height of the tower or any building by bolts and nuts or by site welding. Note:- 2 Payment shall be made on the basis of weight of black (non-galvanised) section only and nothing extra shall be paid on account of variation in weight due to galvanising]. 17 Supplying at site galvanised steel tower materials, [MISSING / UNAVAILABLE MEMBERS ONLY] with average mass of zinc coating of 610 gm/Sqm (approximately 85 micron), membersmay be consisting of either angles, flats, base plates, gusset plates, ladders, connecting plates, climbing ladders, bolts & nuts, washers fabricated as specially instructed and as perapproved drawings and specifications for erection of equivelent tower. The galvanising shall be as per IS: 4759. The structural steel for tower shall confirm to IS: 2062 and fabrication shall be as per IS: 4757. The structural steelsection shall be procured from the main producers like SAIL, RINL, TISCO. In case, structural steel sections from secondaryproducers are permitted, the same shall be restricted only from secondary producers of repute such as PARAS, SRMB, BABA or having valid 18 by the Engineer-in Charge. (The rate includes cost of all operations as above including carriage of all galvanised steel materials from source of procurement to the site of work).Note:- 1 All steel materials shall be made from M.S. high density structural members bolts & nuts, washers etc. Nothing extra shall be payable for special fabrication, erection and fixing of the above steel built up section inposition at any height of the tower or any building by bolts and nuts or by site welding. Note:- 2 Payment shall be made on the basis of weight of black (non-galvanised) section onlyand nothing extra shall be paid on account of variation in weight due to galvanising].
