REPAIR / REPLACEMENT OF LIGHTING CONDUCTORS, EARTHING AND CONNECTED WORKS AT KANCHRAPARA, JAFFERPORE, BARASAT AND LOS DUM DUM UNDER GE (AF) BARRACKPORE

Amount

Material and labour for earthing complete with copper earth plate electrode of size 600 x 600 x 3.15mm thick buried directly in ground with earth pit not less than 2.25 meter deep below ground level with top edge of plate not less than 1.5 meter below normal ground level connected to copper strip of size 20 x 3mm earth lead by means brazing after fixing of nuts, bolts, check nuts, washers of galvanised iron steel, protected by galvanized iron pipe 40mm bore (medium grade) all as directed including cement concrete (1:3:6) type C-1 earth pit with precast RCC (1:1.5:3) type A-1 cover slab of size 42 x 42 x 10cm thick reinforced with 8mm dia TMT bars @ 15 cm c/c both ways with 10mm dia mild steel round bar of 30 cm long, bent to shape as lifting handle, funnel, wire mesh, 20 mm bore galvanized iron pipe (medium grade) for watering, earth testing point, charcoal or coke and salt in alternate layers with necessary earth work in soft/loose soil complete all as shown in electrical plate No 3 of SSR Part I including testing on completion including taking down old existing unserviciable earthing complete all as specified and directed. Note:- Strip upto 7.5m length including testing shall be included in quoted rates.

Material and labour for earthing complete with GI earth plate electrode of size 600 x 600 x 6 mm thick buried directly in ground with earth pit not less than 2.25 meter deep below ground level with top edge of plate not less than 1.5 meter below normal ground level connected to GI earth strip of size 32 x 6 mm earth lead by means of nuts, bolts, check nuts, washers of galvanised iron as steel, protected by galvanized iron pipe 40mm bore (medium grade) all as directed including cement concrete (1:3:6) type C-1 earth pit with precast RCC (1:1.5:3) type A-1 cover slab of size 42 x 42 x10cm thick reinforced with 8mm dia TMT bars @ 15 cm c/c both ways with 10mm dia mild steel round bar of 30 cm long, bent to shape as lifting handle, funnel, wire mesh, 20 mm bore galvanized iron pipe (medium grade) for watering, charcoal or coke and salt in alternate layers with necessary earth work in soft/loose soil complete all as shown in electrical plate No 3 of SSR Part-I including testing on completion including taking down old existing unserviciable earthing complete all as specified and directed. Note:- GI strip upto 7.5m length including testing shall be included in quoted rates.

Supply and fix in repair copper earth strip 20 x 3.15 mm with saddles and fixing screws on porecelain insulator / spacer fixed at every 1 mtr length for extension of earthing strip on roof/wall and joining the same with existing / new earth test point complete all as specified and directed.

Supply and fix in repair galvanised iron strip of size 32 x 6mm with saddles and fixing screws on porecelain insulator / spacer fixed at every 1 mtr length for extension of earthing strip on roof / wall and joining the same with existing / new earth test point complete all as specified and directed.

Material and labour 40mm dia galvanised steel tubes (light grade) with fittings, laid in trenches / wall for protection of underground earth strip when crossing the road / fixing on wall after taking down old unserviceable pipe complete all as specified and directed.

Materials and labour for for Cross arm bracings, supports, clamps of size 30x3mm and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and inclusive of two coats of aluminium paint over a coat of zinc chrome primer including dismantling of undersize / defected cross arms/ clamps of M.S. channel or angle of any sections complete all as specified and as directed.

Material and labour for air termination single pointed aluminium rod,12mm dia and 300mm long including necessary fixing arrangment using clamps,nuts and nuts including taking down old unserviceable air termination rod complete all as specified and directed.

Material and labour for air termination single pointed copper rod,12mm dia and 300mm long including necessary fixing arrangment using clamps,nuts and nuts including taking down old unserviceable air termination rod complete all as specified and directed.

Material and labour for test point termination box made of gun metal or phosphorus bronze size 75x75x25 mm drilled and screwed including 3 Nos, 8 mm dia, 25mm long hexagonal heads screw for lighting conductors including taking down old existing unserviciable termination box complete all as specified and directed.

Material and labour for welding to GI Earth strip joints including replacement of existing nuts bolts joints complete all as specified and directed.

Material and labour for soldering/brazing to the copper strip joints in replacement of existing nuts bolts joints complete all as specified and directed.

Material and labour for repairing of lightning conductor & air termination rod single or multi pointed of any type and size including dismantling of the full set and refixing after cleaning, replacing nut bolts, making straight of GI pipes, refixing of clamps and nut bolts, fixing of earth strip with proper welding/jointing by nut bolts without any loose joints, replacing of defective/broken saddle piece of any size and type and from air termination point upto earth pit, re-allignment of earth strip by fixing it on wall and reparing of disturbed portion and making good as per existing complete all as specified and directed.

Material and labour for PCC (1:3:6) type C-2 (using 40 mm grade stone aggregate) as in foundation and mass concrete complete all as specified and directed

Materials and labour for 32mm dia high density polyethylene pipes (HDPE) of pressure rating 6 kgf/cm2 to protect earthing strip on walls or in floors etc including taking down old unserviciable existing pipe complete all as specified and directed.

Material and labour for maintenance of conventional earth pit comprising plastering of cracked earth pit cover with CM (1:4), repalcement of PCC/MS sheet earth pit cover of any size and type, pouring salt water solution of salt and water at ratio (1:3) (5Kg :15 Ltr) to bldg earthing, tightening of earth electrode, removing grass around the earth pit, replacement of funnels, watering pipe 20mm dia (light grade) complete all as specified and directed.

Material and labour for excavating for earth pit of size 45 cm x 45 cm x 60 cm into the adjacent of the high resistance value GI earth pit, make a bore of dia 200 mm to a depth of 2 mtr, providing GI strip of size 32x6mm with the protection of 40 mm dia GI pipe (light grade) of 2 mtr length including necessary filling of Back Fill Compound ( 1 bag of 25 Kg) into the bore hole around the protection pipe and connect the GI pipe with 32 x 6 mm GI strip including connection with the existing strip by proper welding/soldering including returning filling complete all as specified and directed. Note:Joints at both ends of GI pipe and GI strip should be welded .

Material and labour for construction of earth pit made out of cement concrete (1:3:6) type C-1 (using 40mm graded stone aggregate) and cover slab made out of precast RCC (1:1.5:3) type A-1 (using 20mm graded stone aggregate) of size 42 x 42 x 10cm thick reinforced with 8mm dia TMT bars @ 15 cm c/c both ways with 10mm dia mild steel round bar of 30 cm long, bent to shape as lifting handle, funnel, wire mesh including dismantling of old existing earth pit complete all as specified and directed .

Material and labour for painting of earth pit chamber by two coats of synthetic enamel paint after cleaning earth pit properly with iron wire brush and indicating board as per colour code complete all as specified and directed.

NC BOSE AND CO

JADAV CONSTRUCTION

Das and Brothers

APOLLO TRADERS