Military Engineer Services Tender

M&L drilling perfectly vertical bore hole of a diameter suitable to receive 100mm nominal bore MS casing pipe upto 30 mtr depth below ground level including material, transporting, lowering & fixing of 100mm nominal bore MS casing plain pipe (ISI marked, medium class, in 6 mtr length with socket) inside the bore hole and all works pertaining to drilling such as transportation, installation & removal of drilling machine etc. in all type of soil / rock. In addition to above ISI marked hollow copper earth electrode with outer dia 60mm and thickness of pipe 1.6mm duly filled with CCM (Cristal Conducting Material) with making inter-connection each electrode upto 30 mtr long and bore filled back with charcoal dust, common salt, magnesuim sulphate in alternate layers. Terminal of electrode connected with copper strip 32mm x 6mm 7.5 mtr long including brazing work for connection with copper electrode and testing point and GI Pipe 40mm dia medium grade 7.5 mtr long for protection of copper strip and to be connected with existing earth pits at different location including PCC 1:3:6 C-1 pit & RCC 1:2:4 B-1 cover including testing on completion including taking down / dismantling of existing copper earthing/chemicals complete all as specified & directed.

Notes for BOQ item No. 1: (i) The contractor shall give a written guarantee of five years for maintaining the earth resistance less than 1 Ohm after certified date of completion. A Security deposit against Guarantee of earthing resistance shall be submitted by contractor @ 5% of work done amount. (ii) Earthing shall be tested after completion of work by the contractor in presence of Engineer-in-charge, user and proper record shall be maintened duly signed by all concerned. After testing if the desired earth resistance of less than 1 Ohm is not obtained, the earthing shall be redone at no extra cost to Govt. till desired result is obtained. (iii) Copper strip and GI pipe for protection upto 7.5 mtr included in quoted rates and beyond 7.5 mtr same shall be measured and paid seprately. (iv) Quoted rates are deemed to be inlcuded of all type of tools and plants and all above aspects.

M&L in replacement 32mm x 6mm copper strip as earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. complete all as specified & directed.