Military Engineer Services Tender

M&L for earthing complete with galvanised steel earth plate electrode of size 60 cm x 60 cm x 6 mm thick burried directly in ground (earth pit not less than 2.25 metres deep below normal ground level) vertically, with top edge of plate not less than 1.5 metre below normal ground level connected to galvanised earth lead wire 4 mm dia by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No 3 of MES Schedule Part-I connecting to earthing test. Testing on completion with and including necessary excavation and earth work in any type soil, earth lead connected to earth test point & to main switch board etc with & including adequate quantity of charcoal dust and common salt, test point, PCC (1:3:6) type C-1 (using 20mm graded BT stone aggregate) for earth pit with mild steel angle iron frame of size 40mm x 40mm x 6mm for cover, internal surface of concrete shall be finished with 10mm thick plaster in CM 1:4, pre cast RCC (1:2:4) type B-1 (using 20mm graded BT stone aggregate) 40mm thick cover, reinforced with 8mm dia deformed or TMT bars 3 Nos both way with 12 mm dia round bar handle, GI medium grade watering pipe 20 mm dia with funnel and wire mesh and 15mm dia GI medium grade earth lead protection pipe including provn of earth test point made of MS Flat of size 50mm x 5 mm in 'D' shape 500 mm legth grouted in wall complete with 1mm x 6 mm multistrand PVC insulated copper conductor ( Green Colour) to be provided from test point to DB through 20 mm dia concealed non metallic conduit complete all as specified and directed.

Description as per item No 1 but using 32mmx6 mm GI earth strip as a earth lead & 40 mm dia light grade GI protection pipe complete all as specified and directed.

M&L for dismantling & renewal of UNSV lightening conductor assembly made out of GI pipe light grade of size 50 mm bore along with welded flange, fixed on the RCC roof of the bldgs with drilling/making hole and provide fastners, 6 mm thick rubber washer of suitable size at one end & GI reducer socket of size 50mm x 40mm at another end connected with GI pipe light grade of 40 mm bore with one end GI reducer socket to connect air termination & connector for earth strip duly fixed with necessary fastners, nuts bolts & washers in PCC (1:2:4) type B0 (using 12.5mm graded stone aggregate) of size 45cm x 45cm x45cm complete all as specified and directed. Note : GI pipe 50mm (1.5 RM for each)/40MM (1.0 RM for each) & air termination shall be measured & paid separately under relevant items. (ii) Water leak protection has to be ensured, Pure Resin based Chemical anchoring system. (iii) Air temination shall be measured & paid separately under relevant items.