REPAIR MAINTENANCE OF EARTHING LIGHTENING ARRESTOR AND CERTAIN MISC EM WORKS AT AF STATION SURATGARH

Amount

BOQ (REPAIR/ MAINTENANCE OF EARTHING, LIGHTENING, ARRESTOR AND CERTAIN MISC E/M WORKS AT AF STATION SURATGARH)

Air termination, single pointed aluminium rod 12 mm dia and 300 mm long bolted to aluminium strip 25x3 mm , including fixing brackets, clamps made out of steel sections, nuts,bolts and securing of complete system on roof of the building, including taking down existing unserviceable aluminium air termination rod, complete all as specified and directed by Engineer-in-Charge.

Air termination, single pointed copper rod 12 mm dia and 300 mm long bolted to copper strip 25x3 mm , including fixing brackets, clamps made out of steel sections, nuts,bolts and securing of complete system on roof of the building, including taking down existing unserviceable copper air termination rod, complete all as specified and directed by Engineer-in-Charge.

Earth continuity conductor or main earthing lead of 20 x 3 mm copper strip fixed to wall on insulators 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 , including taking down existing unserviceable copper strip, complete all as specified and directed by Engineer-in-Charge.

Earth continuity conductor or main earthing lead of 25 x 3 mm aluminium strip fixed to wall on insulators 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 , including taking down existing unserviceable aluminium strip, complete all as specified and directed by Engineer-in-Charge.

Earth continuity conductor or main earthing lead of 32 x 6 mm copper strip fixed to wall on insulators 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 , including taking down existing unserviceable copper strip, complete all as specified and directed by Engineer-in-Charge.

Epoxy base insulators of suitable size 40mm height for fixing GI earth strip on wall/ceiling/floor/poles etc. including taking down existing unserviceable insulators, complete all as specified and directed by Engineer-in-Charge.

Galvanized tubes 50 mm bore light grade for protection of GI strip/ Air termination etc. in trenches/ road/ nallah or fixed along wall/ pole including mild steel clamps, screws etc, including taking down of old rusted galvanized iron tube , complete all as specified and directed by Engineer-in-Charge. Make: TATA/ JINDAL/ BST.

Galvanized tubes 40 mm bore light grade for protection of GI strip/ Air termination etc. in trenches/ road/ nallah or fixed along wall/ pole including mild steel clamps, screws etc, including taking down of old rusted galvanized iron tube ,complete all as specified and directed by Engineer-in-Charge. Make: TATA/ JINDAL/ BST.

Galvanized tubes 20 mm bore light grade for protection of GI strip/ Air termination etc. in trenches/ road/ nallah or fixed along wall/ pole including mild steel clamps, screws etc, including taking down of old rusted galvanized iron tube , complete all as specified and directed by Engineer-in-Charge. Make: TATA/ JINDAL/ BST.

Earthing complete with G I earth plate electrode 600 mm x 600 mm x 6 mm burried directly in ground vertically in pit of depth not less than 2.25 metre below normal ground level with top edge of the earth plate at a depth not less than 1.5 metre below normal ground level surrounded from all sides with mixture of charcoal and common salt in alternate layers and electrode connected to G I earth strip 32 x 6 mm size by means of brass bolts, nuts, check nuts and washers, earth strip protected by galvanized steel pipe 40 mm bore (light grade) connected to main switch board or any other electrical equipment all as shown in electrical plate No. 3 of SSR-2009 Part I and including necessary excavation and earth work in any type of soil, 20 mm bore medium grade GI pipe for watering, funnel with wire mesh, PCC (1:3:6), type C-1 chamber, pit cover of precast RCC (1:2:4), type B-1, reinforced XPM of weight not less than 4 kg/ Sq.m and MS frame etc. including replacment of old unserviceable earthing, complete all as specified and as directed by Engineer-in-Charge. Note :- (i) The unit rate includes earth lead and protection pipe up to maximum 7.5 metre from earth plate to earth point/test point. (ii) Earth pit shall be constructed minimum 0.5 metre away from earth.

Earthing complete with G I earth plate electrode 600 mm x 600 mm x 6 mm burried directly in ground vertically in pit of depth not less than 2.25 metre below normal ground level with top edge of the earth plate at a depth not less than 1.5 metre below normal ground level surrounded from all sides with mixture of charcoal and common salt in alternate layers and electrode connected to G I earth strip 4 dia G I wire by means of brass bolts, nuts, check nuts and washers, earth strip protected by galvanized steel pipe 40 mm bore (light grade) connected to main switch board or any other electrical equipment all as shown in electrical plate No. 3 of SSR-2009 Part I and including necessary excavation and earth work in any type of soil, 20 mm bore medium grade GI pipe for watering, funnel with wire mesh, PCC (1:3:6), type C-1 chamber, pit cover of precast RCC (1:2:4), type B-1, reinforced XPM of weight not less than 4 kg/ Sq.m and MS frame etc. including replacment of old unserviceable earthing, complete all as specified and as directed by Engineer-in-Charge. Note :- (i) The unit rate includes earth lead and protection pipe up to maximum 7.5 metre from earth plate to earth point/test point. (ii) Earth pit shall be constructed minimum 0.5 metre away from earth.

Chemical earthing with one No of copper earth plate of size 900 x 600 x 5 mm & copper earth strip 32 x 6 mm buried in ground vertically to a width 0.8 mtr , 0.8 mtr breadth and depth not less than 3.5 metre below ground level with top edge earth electrode at a depth not less than 2.60 metre deep below ground level including suitable quantity of backfill chemical compound (readymade GEL) for filling in each pit to cover earth electrode minimum 100 mm all around and after filling of readymade gel then filling Mgso4 upto 0.80 mtr width and 0.80 mtr breadth and 0.60 mtr high and after filling of Mgso4 then filling mixture of charcoal and common salt in alternate layer upto 1 mtr heigh and 0.80 mtr width and 0.80 mtr breadth then filling and electrode shall be jointed with the copper strip of size 32 x 6 mm by exhothermic weld complete with earth pit chamber of size 300 x300 mm and RCC cover for demarking the location of earth electrode location, including replacment of old unserviceable earthing, complete all as specified and as directed by Engineer-in-Charge. Make of Back Fill Compound: Tercel (Isogel) (Australia)/ Indelec (Xgel) (France)/ ERICO (GEM) (USA)/ LPF (Reslo) (Australia) (Note :- (i) The quantity of Backfill compound and depth of earth pit can be increased by the contractor without any extra cost to Govt. The contractor shall ensure that earth resistance shall be less than 1 ohm on completion and testing upto minimum 5 years. The testing of each earthing shall be carried out in presence of Engr-in-charge and test results shall be submitted duly signed by all concered while claiming payments.) (ii) Earth strip with protection pipe 50mm GI light grade upto 7.5 meter is deemed to be included in the rates quoted. (iii) Complete earthing will be redone at no extra cost to department, if result is not found below 1 ohm. (iv) Using of back fill compound is only in readymade GEL type.

Galvanized tubes 15 mm bore medium grade for with all fitting laid in trenches/ road/ nallah or fixed along wall/ pole including mild steel clamps, screws etc, including taking down of old rusted galvanized iron tube , complete all as specified and directed by Engineer-in-Charge. Make: TATA/ JINDAL/ BST/OSWAL.

Galvanized tubes 20 mm bore medium grade for with all fitting laid in trenches/ road/ nallah or fixed along wall/ pole including mild steel clamps, screws etc, including taking down of old rusted galvanized iron tube , complete all as specified and directed by Engineer-in-Charge. Make: TATA/ JINDAL/ BST/OSWAL.

Bib tap standard of PTMT any colour high pressure screwed for iron pipe and fixed (Minimum weight 15mm-90gms/20mm-125gms, including taking down of old unserviceable valve/ tap , complete all as specified and directed by Engineer-in-Charge.

Dismantling existing water storage tanks exc 501 litres but n.exc 1000 litres capacity by disconnecting existing water connection and removal from site , complete all as specified and directed by Engineer-in-Charge

Rotational moulded PVC, double layered, water storage tanks of capacity 1000 litre (cylindrical vertical with closed top), ISI Marked, hoisted and fixed in position, with & including all fittings such as GI tank nipple etc. but excluding ball valve , complete all as specified and directed by Engineer –in-Charge.

Ball valve of 20mm bore high pressure of PTMT with epoxy coated Aluminium rod & high density plastic ball screwed for iron pipe and fixed. (Minimum weight 210 gms) & fixed in repairs , complete all as specified and directed by Engineer-in-Charge.

Excavation in trenches n .exc 1.5 mtr wide and not exec 1.5 mtr depth and getting out in loose/soft soil, complete all as specified and directed by Engineer-in-Charge.

Returning filling in incl spreading leveling, watering and well ramming in layer not less than 25 cm each layer , complete all as specified and directed by Engineer-in-Charge.

Removing excavated material to a distance not exc 50m and depositing where directed at a level n.exc 1.5 mtr above the starting point, complete all as specified and directed by Engineer-in-Charge.

Supplying and mixing of common salt in water and filling existing conventional earth pits, complete all as directed by Engineer-in-Charge. Note:- Common salt shall be measured dry i.e. before mixing in the water.

Contract Amount shall be derived after affecting the amount of Schedule of Credit in General Summary on serial page No 15 of tender documents.

M/s Rohit Construction Co.

SRI SAI CONSTRUCTION COMPANY

AJAY ELECTRIC COMPANY

SHARMA CONSTRUCATION COMPANY

DASHMESH ENTERPRISES