REPAIRS / MAINTENANCE OF LIGHTENING CONDUCTORS AND BLDG EARTHING AT ZAKHAMA MILITARY STATION UNDER AGE(I) ZAKHAMA.

Amount

M & L for Lighting conductor of Air terminal , single pointed, copper rod 12mm dia and 300 mm long including taking of old terminal of any description completed all as specified and as directed.

M & L for test point teminal block made of gun metal or phosphorus bronze size 75x75x25 mm ,drilled and screwed including 3 nos 8 mm 25 mm long hexgonal Head screw including taking out old one completed all as specified and as directed.

M & L for Copper strip 25 x 3.15mm to be fix on top of "V" type porcelain insulator or DMC insulator of suitable size and fixing screws etc. for roof conductors and down conductors above ground including taking out old strip of any description complete all as specified and as directed.

M&L for earthing complete with copper earth plate electrode 60cm x 60cm x 3.15 mm buried directly in ground vertically to a depth not less than 2.25 metre below ground level with the top edge not less than 1.5 metre below ground level connected to copper strip 20 X 3 mm as earth lead by means of nut, bolts check nut and washer of galvanised iron or steel etc all as shown in electrical plate No.3 of SSR part I- 2009 connected to earth test point all as specified or indicated including PCC pit in PCC (1:3:6) type C-1 cast iron MS frame, 50 mm thick pre cast RCC cover(1:2:4) type nominal mixed cover slab rainforced with 8 mm dia, TMT bar 150 C/C and suitable for handle cast including necessary exavation earth work in hard/dense soil and disposal of soil to distance n exc 50 m and charcoal 120Kg, salt 105 kg, funnel with water pipe ,wire mesh, copper logs etc GI protection pipe of size 40 mm bore dia including tetsing complete including dismantling old existing earthing complete all as specified and as directed. NOTES 1). The unit rate include copper strip from top of earth plate upto 7.5 meter above ground level.

M&L for earthing complete with GI earth plate electrode of size 60cm x 60cm x 6 mm buried directly in ground vertically at a depth not less than 2.25 metre below normal ground level with top edge of earth plate at a depth not less than 1.5 metre below normal ground level sorrounded from all sides by 15cm thick and packed layer of charcoal dust and common salt filling in alternate layers etc and connected to and including 4mm dia GI wire upto 7.5 m by means of bolts, nuts, check nuts and washers made of galvanised iron and protected by light grade 15mm dia GI pipe connected to main control board and GI pipe medium grade 20mm bore for watering and including funnel, wire mesh, charcoal,salt etc RCC pit cover flush to earth pit 50mm thick reinforced with 8mm TMT bar 150mm C/C and PCC chamber pit with PCC (1:3:6) type C1 (using 20mm graded aggregate) including taking down old one and testing after completion all as specified and shown on plate No 3 of SSR Part-I 2009 complete all as specified and as directed.

M&L for pre cast RCC cover slab of size 300mm x 300mm x 10mm thick, type B1 (using 20 mm graded stone aggregate), rainforced with 8 mm dia TMT bar at distance 150 mm C/C and suitable handle, providing funnel with all relevant items and two coats of white wash, writing earth pit No, testing of earth resistance etc including dismantling of old one complete all as specified and as directed.

ZEVIZO ZUTSO

Shri B K Ukil