Tightening of nuts and bolts of 10 Nos. Ground Based Towers under Bijnore Operational Area (Phase-l) (2nd Call).

Supplying at site hot-dipped galvanized steel members for tower to fix the same wherever found missing or replace any damaged / bent tower members all complete as per direction of Engineer-in Charge. (The materials to be used for tower - members shall be galvanized M.S. of grade A as per lS: |2062 -1999 and IS: 808 -1989 and satisfy the relevant test as per IS codes. The falbrication shall be done in accordance with IS: 800-1984 and also in accordance with the approved drawings for the |towers under maintenance. The galvanizing shall conform to IS: 4759 and 2629. The total mass of lgalvanizing coating shall not be less than 610 gms/ Sgm i.e. 85 micron thickness)

Supplying at site hot-dipped galvanized M.S nuts, bolts, spring washers and plain washers of required size for fixing the same at the joints / junctions of tower wherever found required during |maintenance of tower all complete as per the direction of Engineer-in-Charge. (The material for nuts, bolts shall be of grade 4.6 and as per 6639- 1972, IS: 1364 (Part I to V) -2002, IS: 1367 ( Part |VIl) -1992, Plain washers as per 1S: 6610-1972 and spring washers of type B as per IS:3063-1994, |IS:1148-1982, IS:2015-1977).

Carrying out detailed and precise checking of all nuts and bolts, spring and plain washers provided at all the joints / junctions of the base assembly, vertical legs members, face bracings members, |various members of working platforms at different levels, antenna fixtures assembly, lightening arrestors, aviation light, earth resistance, ladders with safety cage, wave guide racks and all other |figurers etc, proper tightening of all the nuts with torque wrench of required size etc. complete |including fixing of new hot-dipped galvanized nuts, bolts, spring and plain washers etc. of various sizes where found missing / required, including providing and applying rust removing solution and cutting the nuts / bolts etc. wherever required to be replaced, including facilitating theodolite & binoculars for checking the verticality of tower and inspection/checking of work all complete as per the direction of Engineer-in-Charge. The rates include cost of dismantling / dismembering of any deformed / bent / de-shaped members which are required to be replaced or repaired. Payment for supplying hot-dipped galvanized nuts, bolts, spring and plain washers, structural members etc. shall be made separately under relevant|items. The agency shall produce insurance coverage certificate for works, failing which a sum of Rs. 5000/- per tower shall be deducted from their bilI.: (1) Roof Top Tower 12/15/21 M height

Tower upto 40 M height.

Tower 60 M height.

Credit to unserviciable MS/GI items