Military Engineer Services Tender

M&L for study of earth/soil resistivity (tomographic survey of soil) by Conducting earth resistivity test using earth tester to find out the resistivity of the plot and to obtain polar resistivity curve and average resistivity in eight direction at AF Stn Mohanbari and submitting the report with recommendation and complete detailed specification of earthing to be considered for obtaining earth resistance value less than 1 ohm complete all as specified and directed. Note :- (i) The unit rate also include for necessary excavation in any type of soil (ii) Report shall be submitted in duplicate set. (iii) Study at one location shall be measured and paid at one job. (iv) Contactor shall submit guarantee @ 5% of quoted rate against this item to ensure earthing results as per design. The same shall be released after successfully completion of Phase-II.)

Material and labour for earthing with copper earth plate electrode 600 mm x 600 mm x 3.15 mm thick, burried directly in ground vertically to a depth of not less than 2.25 mtr below ground level connected to copper strip of size 20 x 3 mm as earthing lead means of nut, bolts and washers made out of Brass and 40 mm dia GI pipe "light grade" for protection of earth lead and connected to control board or main switch or as directed by Engr -in-Charge including earthing pit in PCC (1:3:6) type C-1, pre-cast reinforced cover with MS XPM Jalli, RCC 1:1.5:3 cover slab of size 300 x 300 x 100 mm with one handle made out of 8 mm dia round bar 20 mm dia GI pipe light grade for watering funnels, wire mesh and provided charcoal or coke of alternative layers of 15 cm including necessary earth work complete shown in electrical plated No 3 and tesing complete all as specified and directed. Note : (i) The earthing pit should be provided with proper earth pit and pit cover. Pit cover should be painted with synthetic enamel paint of approved colour and pit number to be marked on a GI plate above 45 cm from GL as per colour code followed in AF Station. (ii) If the desired earth registance is not achived during testing as per IS the complete earthing shall be carried out by the contractor at his own cost and no extra claim shall be admissable.

Material and labour for earthing with galvanised earth plate electrode 600 mm x 600 mm x 6 mm thick, burried directly in ground vertically to a depth of not less than 2.25 mtr below ground level connected to galvanised iron strip 25 mm x 4 mm thick, by means of nut, bolts and washers made out of galvanised iron mild steel and 50 mm dia GI pipe "light grade" for protection of earth lead and connected to control board or transformer neutral earth or as directed including earthing pit in PCC (1:3:6) type C-1, pre-cast reinforced cover with MS XPM Jalli, RCC 1:1.5:3 cover slab of size 300 mm x 300 mm x 100 mm thick, with one handle made out of 8 mm dia round bar 20 mm dia GI pipe light grade for watering funnels, wire mesh and provided charcoal or coke of alternative layers of 15 cm including necessary earth work complete shown in electrical plated No 3 and testing complete all as specified and as directed.