Military Engineer Services Tender

M&L for earthing complete in replacement with galvanized steel earth plate electrode 60cmx60cmx6mm thick buried directly in ground to a depth not less than 2.25m below normal ground level with top edge of earth plate at a depth not less than 1.50m below ground level, earth plate surrounded by 15cm thick packed layer of charcoal and common salt alternatively upto 90cm and connected with and including GI strip of of size 32x6mm by means of bolts, nuts, check nuts and washers and GI pipe 40mm bore light grade for protection of GI strip ,from earth plate to testing point for protection, 20mm bore GI pipe medium grade for water with wire mesh and funnel for watering including necessary excavation and earh work, PCC chamber 1:3:6 type C-2 with RCC cover complete all as shown in electrical plate No. 03 of MES Schedule Part-I, complete all as specified and directed.

Note:- (i) RCC pit cover shall be precast of RCC 1:2:4 type B-1, 80mm thick reinforcement with 8mm TMT steel bar @ 100 c/c in lieu of CI cover and the rate includes in the unit rate of item.(ii) Earth electrodes shall be protected upto test point using necessary arrangement with suitable size GI pipe upto 7.50m and the rate includes in the unit rate of item. (iii) The earth chamber shall be constructed min 3m away from the edge of the bldg pit and the cost of the same is deemed to be included in the rate quoted for this item.(iv) If the earth resistance value turned out to be unsatisfactory upon testing, the contractor has to redo the earthing free of cost.

All as per item No: 1 above but for using copper plate 60× 60cm ×3.15mm thick electrode and 20×3mm copper strip as earthing lead