SPECIAL REPAIR TO LIGHTNING ARRESTORS INSTALLED AT DSS HANGAR AND TECH FLT HANGAR AT AF STATION SONEGAON, NAGPUR

Amount

Taking down carefully GI/aluminium strip any type, surface/roof fittings such as test point, insulator, air terminal etc complete all as specified and as directed.

S &F 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 in existing drain after taking out RCC/PCC cover block or fixed to poles or any other indicated situation for loop earthing etc.as required 32X6 mm galvanised iron strip connected to Earthing test point all as specified and directed on testing on completion. Note-:The strips are to be bent to shape, drilled with holes, connected with bolts, nuts, washers complete.

All as per Item No 02 here in before , but 25X3 mm Aluminium strip complete all as specified and as directed.

S & F in repairs Air termination, single pointed aluminium rod 12 mm dia and 300 mm long complete with fixing arrangement on top of 50mm GI pipe complete all as specified and directed.

S & F in repairs Test Point terminal block, made of gun metal or phosphorus bronze of size 75 x 75 x 25 mm, drilled and screwed including 3 Nos 8mm dia 25mm long hexagonal head screw complete all as specified and directed.

S & F GI tubing, light grade of bore 40 mm for mounting of lightning arrester on top of building/ roof with grouting in PCC all fitting as required at site complete all as specified and directed.

M&L for PCC (1:3:6) type C-1 using 20mm graded stone aggregate as in coping of pole and the like including weathering, slightly rounded or chamfered angles and throating etc.including necessary formwork complete all as specified and directed.

Earthing complete with galvanized steel earth plate electrode 60 cm x 60cmx6 mm thick, buried directly in ground vertically (earth pit not less than 2.25 m deep below ground level) with top edge of the earth plate not less than 1.5m below ground level , connected to GI strips of size 32 x 6 mm as earthling lead by means of bolts, nuts, check nuts and washers of galvanized iron and connected to main switch/control board upto 7.5m away from the earth electrode including necessary excavation in any type of strata, drilling of holes in electrode, PCC pit in cement concrete (Type B1, 1:2:4), PCC chamber , 40mm thick Precast RCC cover slab with suitable handle, requisite quantity of charcoal and common salt, watering pipe, MS funnel, wire mesh., lugs, earth lead protection pipe GI 15mm bore, light grade 7.5m long as applicable etc including returning, filling , removal of soil outside MD land complete all as shown in electrical plate No. 3 of MES Sch Part I , connected to Earthing test point all as specified and directed and testing on completion. Note : On testing after completion if the desired earth resistance is not obtained the earthing will be redone at no extra cost to the Government.

Renewal of existing earthing (GI/copper earthing) with provision of new layers of charcoal and salt all as specified in electrical plate No 5 of SSR Part-I, including cleaning of existing GI/copper earth plate, conductors etc., connecting with new bolts, nuts and washers complete including testing of earthing by digital Earth Ground Resistance Tester & Record submitted to Dept on completion all as directed. Note: -1. Excavation,Returning filling & demolition of PCC Near earth pit ,the cost of Charcoal, Salt & GI pipe,funnel shall be measured and paid seperately.

Supply only funnel made out of GI / mild steel sheet 3mm thick in conical shape, dia of the funnel at bottom is 15mm and at top is 75mm, placed on GI pipe for watering the earth including taking out existing funnel complete all as specified and as directed. Note: The funnel shall be either welded properly to the watering pipe or bolted with bolts and nuts.

Supply only galvanised steel tubing 20mm bore light grade with all fittings in earthing for watering the earth including taking down of old steel tubing complete all as specified and as directed

Supply only common salt commercial as in repair for above item no 09 in the the process of renewal of existing earthing complete all as specified and as directed.

Supply only Charcoal dust/Breeze in repair for above item no 09 in the the process of renewal of existing earthing complete all as specified and as directed

Rough excavation not exceeding 1.5 m deep and getting out in soft/ loose soil at the place of existing earthing/water pipe line all as directed and specified.

Returning filling in including spreading leveling watering and well ramming in layers not exc 25 cm thick complete all as specified and directed.

Removing of surplus excavated material to a distance not exceeding 50 mtr and depositing where directed at a level not exc 1.5 mtr above the starting point all as specified and directed.

M&L synthetic enamel paint of yellow/red colour for Earthing pit including pit cover complete all as specified and directed.

M & L for Precast cement concrete Type B1- 1:2:4 with 20 mm graded stone aggregate set in CM 1:4 for Earthing pit Cover complete all as specified and directed.

M & L for providing cement concrete For Earthing pit filling and mass concrete, Type C2- 1:3:6 with 40 mm graded stone aggregate complete all as specified and directed.

M/S JAINENDRA KUMAR JAIN