Repair/Maint/Replacement of earthing infrastructure at Technical area 19 Wing and 14 BRD and external water distribution , allied works at Site C, 3 AFSR and MES area under GE (AF) Borjhar

Amount

M&L for earthing copper earth plate electrode of size 900x600x5mm thick with charcoal and salt and treating the surrounding soil with magnesium sulphate, buried directly in ground (earth pit not less than 2.4m depth below ground level) with top edge of the plate not less than 1.5m below normal ground level connected to copper strip 50x6mm dia by means of brass nuts, bolts, washer and protection pipe for earth strip from the earthing plate to the equipment/ test point/ panel, (GI pipe 80mm bore, Light grade), watering pipe from plate to earthing pit (GI pipe 20mm bore, medium grade), funnel with wiremesh. The earthing pit made up of PCC (1:3:6) type C-I (using 20mm graded stone aggregate) and pit cover, made up of 40mm thick pre cast RCC (1:2:4) type B-I (using 20mm graded stone stone aggregate) reinforced with 6mm dia TMT bars and suitable handle of 8mm dia TMT bars including necessary excavation and earth work all as shown in SSR Part-I Plate No. complete all as specified and as directed.

Note: (i) The copper strip and protection pipe beyond 7.5m length shall be measured and paid separately. However, earthwork for the same is deemed to be included in this rate. (ii) Chemical like magensium sulphate of minimum quantity 150 kg for treatment of surrounding soil is deemed to be included in this rate. (iii) The desired value of earth resistance is less than 2 Ω, on testing after completion if the desired earth resistance is not obtained; the earthing will be redone at no extra cost, otherwise it will not be measured and paid to the contractor. (iv) The approx size of earth work for chemical treatment of soil and earthing is 2.4m x 1.5m x 0.6m {D x L x W] and form work of size1.2m x 0.9m x 0.6m for pouring charcoal & salt is deemed to be included in this rate (v) During earth work if surface water found at site, the cost for dewatering through pumpset is deemed to be included in this rate.

M&L for earthing copper earth plate electrode of size 900x600x5mm thick with charcoal and salt and treating the surrounding soil with magnesium sulphate, buried directly in ground (earth pit not less than 2.4m depth below ground level) with top edge of the plate not less than 1.5m below normal ground level, connected to copper strip of size 32x6mm mm dia by means of brass nuts, bolts, washers and protection pipe for earth strip from the earthing plate to the equipment/ test point/ panel, (GI pipe 50mm bore, light grade), watering pipe from plate to earthing pit (GI pipe 20mm bore, medium grade), funnel with wiremesh. The earthing pit made up of PCC 1:3:6 type C-I (using 20mm graded stone aggregate) and pit cover made up of 40mm thick pre cast RCC (1:2:4) type B-I (using 20mm graded stone aggregate) reinforced with 6mm dia TMT bar and suitable handle of 8mm dia TMT bar including necessary excavation and earth work all as shown in SSR Part-I Plate No. complete all as specified and as directed.

Notes: (i) The copper strip and protection pipe beyond 7.5m length shall be measured and paid separately. However, earthwork for the same is deemed to be included in this rate. (ii) Chemical like magensium sulphate of minimum quantity 150 kg for treatment of surrounding soil is deemed to be included in this rate. (iii) The desired value of earth resistance is less than 2 Ω, on testing after completion if the desired earth resistance is not obtained; the earthing will be redone at no extra cost, otherwise it will not be measured and paid to the contractor. (iv) The approx size of earth work for chemical treatment of soil and earthing is 2.4m x 1.5m x 0.6m {D x L x W] and form work of size1.2m x 0.9m x 0.6m for pouring charcoal & salt is deemed to be included in this rate (v) During earth work if surface water found at site, the cost for dewatering through pumpset is deemed to be included in this rate.

M&L for earthing complete with copper earth plate electrode of size 600x600x3.15mm thick burried directly in ground (earth pit not less than 2.25m depth below ground level) with top edge of the plate not less than 1.5m below normal ground level, connected to copper strip of size 20x3mm dia by means of brass nut, bolt, washer and protection pipe for earth wire from the earthing plate to the DB/main switch/panel, etc.(GI pipe 40mm bore, light grade), watering pipe from plate to earthing pit (GI pipe 20mm bore, medium grade), funnel with wiremesh. The earthing pit made up of PCC (1:3:6) type C-I (using 20mm graded stone aggregate) and pit cover made up of 40mm thick in pre cast RCC (1:2:4) type B-I (using 20mm graded stone aggregate) reinforced with 6mm dia TMT bar and suitable handle of 8mm dia TMT bar including necessary excavation and earth work all as shown in SSR Part-I, Plate No.5 complete all as specified and as directed.

Notes : (i) The copper strip and protection pipe beyond 7.5m length shall be measured and paid separately. However, earthwork for the same is deemed to be included in this rate. (ii) The desired value of earth resistance is less than 5 Ω, on testing after completion if the desired earth resistance is not obtained; the earthing will be redone at no extra cost, otherwise it will not be measured and paid to the contractor. (iii) Form work of size 0.9m x 0.9m x 0.6m for pouring charcoal and salt is deemed to be included in this rate (v) During earth work if surface water found at site, the cost for dewatering through pumpset is deemed to be included in this rate

Taking out carefully old corroded earth continuity conductor of any types and sizes from brick wall/ RCC structure/CGI sheet or equivalent location including making good of all disturbed surfaces all as specified and as directed.

M&L for earth continuity conductor or main earthing lead fixed to wall / roof by DMC insulator (as required basis) on any other indicated location for loop earthing, etc. with 20x3mm copper strip complete all as specified and as directed. Note : Copper strips shall be fixed on bridge insulator of 60cm apart if reqd.

M&L for earth continuity conductor or main earthing lead fixed to wall / roof by DMC insulator (as required basis) on any other indicated location for loop earthing etc. with 32x6mm copper strip complete all as specified and as directed. Note : Copper strips shall be fixed on bridge insulator of 60cm apart if required.

M&L earth continuity conductor or main earthing lead fixed to wall / roof by DMC insulator (as required basis) on any other indicated location for loop earthing etc. with 50x6mm copper strip complete all as specified and as directed. Note : Copper strips shall be fixed on bridge insulator of 60cm apart if required.

M&L for fixing of old earth continuity conductor or main earthing lead of any types or sizes (Copper or Aluminium or GI) to wall / roof by dmc insulator (as required basis) on any other indicated location for loop earthing etc with 20x3mm copper strip complete all as specified and as directed. Note : Copper or Aluminium or GI strips shall be fixed on bridge insulator of 60cm apart if required.

Taking out carefully old corroded steel tubes of any types or sizes from brick wall/ RCC structure/ CGI sheet or equivalent location including making good of disturbed surfaces complete all as specified and as directed.

S&F galvanized steel tubes of 40mm bore, light grade including all fittings like bend, socket, etc. and fixed on walls / ceilings / floors through MS clamp for earth strip protection complete all as specified and as directed.

all as per Serial item No. 10 here-in-before but 50mm bore, light grade.

All as per Serial item No. 10 here-in-before but 80mm bore, light grade

M&L for clamped joints (by overlapping the bars and applying clamps around the overlap) after brazing the jointing portion of the copper earthing strips complete all as specified and as directed.

M&L for test point terminal block made of gun metal for phosphorous bronze of size 75 x 75 x 25mm, drilled and screwed including 3 Nos. 8mm dia with 25mm long hex head screw within halogen free weather proof IP-66 enclosure with one/ two nos mounting bracket complete all as specified and as directed. Make (Enclosure) : Hensel/ OBO (The test point should be 1.0m above ground level.

M&L for excavating in bore holes of 300mm (minimum) dia to a depth of 3450mm (minimum) by augur or any other process in trenches manually not exceeding 0.5cum in each bore including removing surplus excavating material, returning, filling, etc in soft / loose soil complete all as specified and as directed.

Taking out old corroded electrode of any types or sizes from maintenance free chemical earthing complete all as specified anad as directed.

Supply, installation, testing and commissioning of maintenance free chemical earthing by pure Copper Electrode of 17.2mm dia and 3000mm long for earthing with excellent electrical conductivity and corrosion resistance, minimum 50 kg ground enhancing compound/ material used around the electrode inside the earth pit to define the working environment of the earthing system complete all as specified and as directed. Note : Electrode - 99.9% pure copper rod with test certificate for purity from any Government lab, Ground Enhancing Compound Make : ABB/ OBO/ Ennov/ True Power

The process for the earthing is appended as below:- (i) Soil resistivity of that area shall be measured. (ii) If soil resistivity is more, then multiple earthing shall be carried out in grid pattern i.e if two earthing is reqd then the pattern is" ── " and if three earthing is reqd the the pattern is "∆", but a minimum distance of 2 meters between two earth pit should be maintained. However, there should not be more than three earthing pit in a grid. (iii) Make a bore of 300mm (minimum) dia to a depth of 3450mm (minimum) by augur or any other process. (iv) The soil dug out from the earth pit shall be checked to remove lumps and stones from it, before back filling. (iv) Moisture retaining ground enhancing materials of minimum 50 kg having resistivity equal to or less than 0.3 Ωm shall be poured in the bore. (v) A layer of 150mm of the above ground enhancing materials shall be prepared at the bottom. (vi) Plastic sleeves from electrode shall be removed before it is lowered in the pit. (vii) Small quantity of ground enhancing material shall be filled at a time and some water in the pit. Further quantity shall be added after the earlier quantity has been sufficiently poked with suitable rod to remove trapped air bubbles from it.

(viii) If grid earthing is reqd. necessary interconnection shall be carried out by 20x3mm copper strip which shall be buried below 300mm from G.L with additional quantity of ground enhancing material and cost of the same is deemed to be included in this rate (ix) After connection to the earth strip,inspection pit shall be prepared & it shall be made up of PCC (1:3:6) type C-I (using 20mm graded stone aggregate) and pit cover made up of 40 mm thick pre cast RCC (1:2:4) type B-I (using 20mm graded stone aggregate) reinforced with 6mm dia TMT bar and suitable handle of 8mm dia TMT bar including necessary excavation and earth work complete all as shown in diagram. There shall be provision of hole of 300mm dia for easy termination of strip, pouring normal water during hot summer seasons. (x) A coat of conductive petroleum jelly shall be applied on the terminal of the electrode & copper alloy clamp for protection against corrosion. (xi) A certificate from the Government lab for purity of the electrode and resistivity of ground enhancing compound /material shall be furnished prior approval of sample.

Notes :- (i) If more than one earthing is required due to high soil resistivity at site the payment shall be carried out by measuring extra quantity (ii) The strip for grid earthing/ connetion strip for Test Point shall be measured & paid separately (iii) The cost for excavation,returning filling in & removing of soil shall be measured & paid in the item as mentioned below, however form work if reqd is deemed to be included in this rate (iv) The desired value of earth resistance should be less than 2 Ω & after testing in presence of the rep of the Engineer-in-Charge, if the earth resistance value is not obtained, the earthing will be redone at no extra cost, otherwise it will not be measured and paid to the contractor. (v) The quantity of ground enhancing material as mentioned above is tentative, due to site condition if additional quantity of ground enhancing materials are reqd, the contractor is bound to provide additional quantiy without demanding extra payment for the same from the department. However, the maximum quantity of ground enhancing materials used for chemical earthing pit and grid connections are 75 kg. (vi) During earth work if surface water found at site, the cost for dewatering through pumpset is deemed to be included in this rate.

M&L for charging common salt with mixing water in earthing pit to improve the earth resistance complete all as specified and as directed.

Excavating in trenches manually not exceeding 1.5m wide and not exceeding1.5 mtr in depth/ width for laying under ground cable / foundations and getting out in soft / loose soil all as specified and directed. Note: During excavation no mechanical excavator is permitted at site, contractor will do the excavation through maually.

Returning, filling in incl spreading, leveling, watering and well ramming in layers not exceeding 25cm all as specified and directed.

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

M&L for dismantling / taking out / taking down the unsv./corroded galvanized steel / mild steel / cast iron tubes of 150mm bore including all fittings and removing from site for replacement and depositing the same at store all as specified and directed.

M&L for dismantling / taking out / taking down the unsv./corroded galvanized steel / mild steel / cast iron tubes of 100mm bore including all fittings and removing from site for replacement and depositing the same at store all as specified and directed.

M&L for dismantling / taking out / taking down the unsv./corroded galvanized steel / mild steel / cast iron tubes of 80mm bore including all fittings and removing from site for replacement and depositing the same at store all as specified and directed.

S&F centrifugally cast (spun) Ductile Iron pressure pipes with socket & spigot-end, Class K-9 conforming to IS:8329/2000 suitable for (push on) rubber gasket joint of 150mm bore including rubber gasket (push on) and laid in trenches complete all as specified and directed. Make: Electrosteel/ Electrotherm/ TATA/ Jay Balaji / Rashmi. Note:- The inner surface of pipe should have cement mortar lining with sulphur resistant cement and outer surface should have metallic zinc coating with finishing coat of black bituminous paint.

S&F centrifugally cast (spun) Ductile Iron pressure pipes with socket & spigot-end, Class K-9 conforming to IS:8329/2000 suitable for (push on) rubber gasket joint of 100mm bore including rubber gasket (push on) and laid in trenches complete all as specified and directed. Make: Electrosteel/ Electrotherm/ TATA/ Jay Balaji / Rashmi. Note:- The inner surface of pipe should have cement mortar lining with sulphur resistant cement and outer surface should have metallic zinc coating with finishing coat of black bituminous paint.

S&F centrifugally cast (spun) Ductile Iron pressure pipes with socket & spigot-end, Class K-9 conforming to IS:8329/2000 suitable for (push on) rubber gasket joint of 80mm bore including rubber gasket (push on) and laid in trenches complete all as specified and directed. Make: Electrosteel/ Electrotherm/ TATA/ Jay Balaji / Rashmi. Note:- The inner surface of pipe should have cement mortar lining with sulphur resistant cement and outer surface should have metallic zinc coating with finishing coat of black bituminous paint.

S&F Ductile Iron welded with flange-end of 0.5 m long Class K-9 conforming to IS:8329/2000 suitable for rubber / leather gasket joint of 150mm bore including rubber / leather gasket and nut,bolts & washers of suitable sizes and laid in trenches complete all as specified and directed. Make: Electrosteel/ Electrotherm/ TATA/ Jay Balaji/ Rashmi

S&F Ductile Iron welded with flange-end of 1.0 m long Class K-9 conforming to IS:8329/2000 suitable for rubber / leather gasket joint of 150mm bore including rubber / leather gasket and nut,bolts & washers of suitable sizes and laid in trenches complete all as specified and directed. Make: Electrosteel/ Electrotherm/ TATA/ Jay Balaji/ Rashmi

S&F Ductile Iron welded with flange-end, Class K-9 conforming to IS:8329/2000 suitable for rubber / leather gasket joint of 150mm bore including rubber / leather gasket and nut,bolts & washers of suitable sizes and laid in trenches complete all as specified and directed. Make: Electrosteel/ Electrotherm/ TATA/ Jay Balaji/ Rashmi

M&L for Ductile Iron fittingss Class K-12 conforming to IS:9523/2000 any type & angle for socket & spigot ends, flange ends pipe and dia upto 200mm bore and straight connecting pieces all as specified and directed. Make: ISI Marked

M&L for taking down the valve reflux with bypass arrangement & flanges from the pipe line incl. nuts,bolts & washer of size 150mm all as specified and directed.

S&F valve reflux with bypass arrangement & flanges and fixing the same on the pipe line through leather gasket,nuts,bolts & washer of size 150mm all as specified and directed. Make:- Kirloskar /Audco

M&L for cleaning of dismantled serviceable Galvanized steeI tubes of 40-50mm bore by bamboo stick, wire brush, descaling chemicals and relaying the same including replacement of all fittings (such as bends, elbows, tees, short pieces, connectors, tank connectors, backnuts, diminishing pieces, plugs, unions & flanges etc.) and fixed to trenches / wall / floors complete all as specified and directed.

M&L for repair the leakage/ damage to CI /DI /MS /GI of 40-80mm dia pipeline at any location, any foul condition & time with reqd earth works, jointing materials such as lead wool/ leather gasket / rubber gasket ring /push on joint / socket / union or any reqd pipe fittings for CI /DI /MS/ GI pipe line with reqd nuts/ bolts/ washer and necessary welding works (as reqd.) including necessary T&P all as specified and directed. Note:- Earth/ Excavation works for repairing damage pipeline will be measured and paid separately.

M&L for repair the leakage/ damage to CI /DI /MS /GI of 100- 200mm dia pipeline at any location, any foul condition & time with reqd earth works, jointing materials such as lead wool/ leather gasket / rubber gasket ring /push on joint / socket / union or any reqd pipe fittings for CI /DI /MS/ GI pipe line with reqd nuts/ bolts/ washer and necessary welding works (as reqd.) including necessary T&P all as specified and directed. Note:- Earth/ Excavation works for repairing damage pipeline will be measured and paid separately.

M&L for repair to sluice valve 80mm dia after replacement of gland packing, nut & bolt and brass spindle, fix on the existing GI/ DI/ PPR pipe line through leather gasket of suitable thickness complete all as specified and directed.

M&L for repair to sluice valve 100mm dia after replacement of gland packing, nut & bolt and brass spindle, fix on the existing GI/ DI/ PPR pipe line through leather gasket of suitable thickness complete all as specified and directed.

M&L for repair to sluice valve 150mm dia after replacement of gland packing, nut & bolt and brass spindle, fix on the existing GI/ DI/ PPR pipe line through leather gasket of suitable thickness complete all as specified and directed.

M&L excavation in trenches not exceeding 1.5mtr wide & not exceeding 1.5mtr depth for making valve/ inspection pit/ in hard/soft soil including removing excavated materials not exceeding 50mtr and depositing where directed at a level not exceeding 1.5mtr above the staring point all as specified and directed.

M&L for cement concrete in foundations, filling and mass concreteType C2 1:3:6, 40mm graded aggregate all as specified and directed.

M&L for PCC as in foundation for inspection pit or any other works type C1 (1:3:6) (20mm graded aggregate) all as specified and directed.

M&L for brickwork with subclass ‘B’ bricks, straight or curved on plan exc 6m mean radius, set in cement mortar 1:6 complete all as specified and directed.

M&L rendering 10mm thick in CM 1:6 on fair faces of brick works or concrete surfaces all as specified and directed.

M&L for dismantling / taking down cross-arms of M.S. channel or angle sections / pit cover etc. complete and setting aside for taking credit complete all as specified & directed.

M&L for replacement of inspection pit cover or any other works made up of 3mm thick MS Sheet with locking arrangement (as reqd) including fabrication works such as cutting, welding & bent to shape and painting with two coats of black japan paint over a coat of red oxide primer on steel surfaces of any description over 10cm in width or girth including preparation of new untreated surfaces complete all as specified and directed.

M&L angle iron / flat bar of required sizes with locking arrangements including fabrication works such as such as cutting, welding & bent to shape and painting with two coats of black japan paint over a coat of red oxide primer on steel surfaces of any description over 10cm in width or girth including preparation of new untreated surfaces complete all as specified and directed.

M/S Trio Engineers And Builders

Ms Jahnabi Construction

M/S PANKAJ SUPPLY SYNDICATE

Ms N D Enterpise

Anupam Das

M/s Rawat Enterprises

Purbanchal Construction Co