Erection of 15 m mast on twr chellanam

Amount

Preparatory works for the construction over the ground based tower at +20 metre above ground level including carefully removing the creeper plants and beehive

Labour charges for dismantling of mast upto a height of 6M over ground based tower of height up to 20 metre from ground level etc. including lifting down to ground level with necessary tools and plants required and all as directed by the Engineer-in-charge

Transportation of four nos of mast material ,each of size 3.00metres x 0.80mx0.80m from Gandhinagar store compound, Ernakulam to the site . including loading, unloading and stacking etc.at Chellanam and two nos of dismantled damaged mast material, each of of size up to 3.00 metrex0.80x 0.80m from Chellanam site to Gandhinagar store compound / Kaloor Store compound including loading, unloading and stacking etc of as per direction of Engineer-in-charge. (One way Distance is approximately 17 kms)

Steel work in built up tubular ( round, square or rectangular hollow tubes etc.) trusses and connecting plates including nuts and bolts etc., including cutting, hoisting, fixing in position and applying a priming coat of approved steel primer, including welding and bolted with special shaped washers etc. complete.

a)Galvanised iron Medium duty Class B tubes of grade IS1239 of Tata tubes or equivalent

Labour charges for erection of mast upto a height of 15M over20 Metre Ground based tower top level, ladder etc. including lifting upto required levels with necessary tools and plants required and all as directed by the Engineer-in-charge

Providing and fixing GI wire ropes of 6mm dia for anchoring and tightening the mast with necessary fastners, 'D' Shackle,tightening clip, nut bolts etc.complete Drilling holes of 16mm dia holes on roofing slab/beam upto 10-15cm depth and fixing 12mm anchor bars with high strength polyester resin anchor grout (Fosroc Lockfix-S)

Drilling holes of 16mm dia holes on roofing slab/beam upto 10-15cm depth and fixing 12mm anchor bars bent to required shape and length up to 60cm with high strength polyester resin anchor grout (Fosroc Lockfix-S) or equivalent as per the direction of engineer in charge

Painting Mast with synthetic enamel paint or equivalent in two or more coats over and including base coats of etching primer or equivalent of required shade and colour as directed by engineer in charge.

Painting narrow based ground based tower portion of bottom size 2.20mx2.20m and top size up to 1.20mx1.20m and height up to 20 metre above ground level with synthetic enamel paint or equivalent in two or more coats over and including base coats of etch primer or equivalent of required shade wherever necessary and zinc chromate primer of required shade and colour as directed by engineer in charge.

Providing G.I bus bar of 25 X 5 mm connected to the tinned bottom portion of lightning conductor and to the ring earth/plate earth with 2 Nos of 10 mm dia GI nuts & bolts [with lead sheath in between] at each connection. The bus bar shall be drawn through heat shrink sleeve and shall be shrunk properly. The bus bar shall be clamped to the tower/ building walls at uniform interval of 1.5 Mt.. using proper GI clamps and ceramic insulators such that the bus bar shall be well insulated from the tower building walls all complete as directed by the Engineer-in-charge.(All joints should be covered by Shalimar or equivalent water proof tape and made air tight)

Providing GI strips of size 25 X 5 mm one end connected to the tower leg with GI bolt and nuts (with lead sheath in between) including providing and connecting the legs at the bottom of tower and the other end shall be connected to the GI plate earth/ring earth with GI bots and nuts [with lead sheath in between] including clamping the down lead flat to walls/stems without any sharp bends using necessary clamps and screws as directed by the Engineer -in-charge.(All joints should be covered by Shalimar or equivalent water proof tape and made air tight)

Providing and fixing spike type copper lightening arrester of 1.0mtr length with necessary fixtures at top of the tower. The spike shall be insulated from tower by Teflon material. The spike shall be connected to G.I plate earthing by GI strip which shall be paid seperately.

Transportation of up to 10 (ten) nos of mast material segments each of size 3.00metres x 0.80mx0.80m( approximately ) from Gandhinagar store compound, Ernakulam to the Kaloor Mobile sercices Store compound including loading, unloading and stacking etc of as per direction of Engineer-in-charge. (One way Distance is approximately 4 km

Providing GI plate earth including excavation of pit of size 1500 x 1500 x 3000mm depth in all kinds of soil and placing 4nos of GI plates of size 600 x 600 x 6mm thick vertically at diagonally opposite ends in the excavated pit and inter connect the plates with 25 x 3mm GI strips with 2 nos of GI bolts and nuts of 10mm dia at each connection and placing galvanized iron pipe of 50mm dia and 3000mm length at the center of the GI plate grid and inter connect the pipe at minimum two sides with the connecting flat of the GI plates with tinned GI flat of size 25 x 3mm with GI bolts and nuts and till the pit upto a depth of 650mm with charcoal of 20mm nominal size and the remaining portion of pit shall be filled with loose soil free from stones and wet the entire sopil with water and cover the pit with 600 x 600 x 500 mm thick precast reinforced concrete slab having 75mm dia hole at the center to pass the GI pipe and construct a chamber of internal size not less than 280 x 280 x250mm with half brick wall including fixing C.I manhole cover of size 300 x 300mm of weight not less than 7.20kg (cover & frame) and plastering the chamber on all sides with cement mortar 1:4 of 12mm thick ( 1 cement: 4 fine sand) and including disposal of surplus excavated earth if any within a distance of 5km lead as directed by the Engineer-in-charge.

M/s. ANTONY KJ

SOMAN BT