REPAIR/MAINT OF FENCING AND COMPOUND WALL AND ITS PLASTERING AND MISC WORKS IN TECH AREA AND REPAIR/REPLACEMENT OF CHEMICAL AND CONVETIONAL EARTHING AND CONNECTED WORK AT AF STN HASIMARA UNDER GE (AF) HASIMARA

Amount

Demolition of brick work or stone masonry built in cement mortar including all quins, arches, pillars etc but excluding ashlar facing, dressed stone work and precast concrete articles and removing rubbish off the premises complete all as specified and as directed

Material and labour for brick work with sub class 'B' bricks (old size bricks) straight or curved on plan exc 6m mean radius built in cement mortar (1:6), complete all as specified and as directed.

Material and labour for walling of random rubble, uncoursed, wall bonded and solidly hearted, built cement mortar (1:6), complete all as specified and as directed.

Rendering 15mm thick on other than fair faces of brick work/concrete surfaces in any position in CM (1:4) finishing surface even smooth w/o using extra cement, complete all as specified and as directed.

Taking down cement plaster on brick or stone walls etc including raking out joints, hacking for key, scrubbing down with water etc. and removing rubbish off the premises, complete all as specified and as directed.

Material and labour for finishing walls with premium acrylic smooth exterior paint with silicone additives of required shade, with two or more coats applied @ 1.43 ltr/10 Sqm over and including priming coat of exterior primer applied @ 2.20 kg/10 Sqms, complete all as specified and as directed.

M&L for two coats of cement base paint to wall including preparation of old surfaces of wall, complete all as specefied and as directed.

M&L for mild steel TMT bars 5mm to 10mm dia., cut to length, bent to shape required, including cranking, bending spirally for hoping for columns, hooking ends and binding with mild steel wire (annealed) not less than 0.9mm dia., or securing with clips, complete all as specified and directed.

M & L for mild steel TMT bars 10mm dia., and over cut to length, bent to shape required, including cranking, bending spirally for hooping for columns, hooking ends and binding with mild steel wire (annealed) not less than 0.9mm dia., or securing with clips, complete all as specified and as directed.

M&L for plain cement concrete (1:2:4) type B1 (using 20 mm graded crushed stone aggregate) as mass concrete, footings, col and beams/slab cover, complete all as specified and as directed.

M&L for use and waste of form work to sides of concrete foundations footings base of colums, plinth beams, raft and raft beams, sides and soffits of foundation, complete all as specified and as directed.

M&L for use and waste of form work to sides of pillars, posts, struts, piers, colums and stanchions, complete all as specified and as directed.

M & L for PCC (1:2:4), type B-1, (using 20mm graded crushed stone aggregate) as in coping and fixing of swan angles etc., complete all as specified and as directed.

M&L for plain cement concrete (1:4:8) type D-2 (using 40mm graded crushed stone aggregate) as in foundation filling or mass concrete, complete all as specified and as directed.

Demolition of cement concrete (reinforced) of any description and in any position not otherwise specifically provided for and removing rubbish off the premises complete all as specified and as directed.

Demolition of cement concrete (unreinforced) of any description and in any position not otherwise specifically provided for and removing rubbish off the premises complete all as specified and as directed.

M&L for hardcore of broken stone or boulders of gauge n exc. 63mm, deposited, spread and levelled in layers n exc. 15cm thick, watered and rammed to a true surface, complete all as specefied and as directed.

M&L for 100mm thick plain cement concrete (1:3:6) type C2 (using 40mm graded crushed stone aggregate) in sub base of flooring & plinth protection etc surface finished even and smooth without using extra cement, complete all as specefied and as directed.

M & L for 50mm thick sand filling under interlocking paver block including watering and consolidation, complete all as specified and as directed.

M & L for machine pressed pre cast concrete interlocking paver block (with grey cement and pigment) any shape and size confirming to IS- 15658-2006 of 60mm thick, M-40 grade, complete all as specified and as directed.

Dismantling floor, hearth or wall tiling including cement mortar bedding (but not backing), removing serviceable tiles to store and rubbish off the premises, complete as specified and as directed.

M & L for chequered cement concrete tiles glossy finish, coloured 20 to 22mm thick, of any size and pattern as approved by GE as in patches in floor with set & jointed in neat cement slurry in floors & including 15mm thick screed bed in cement mortar (1:6), complete all as specified and as directed. .

S&F galvanized 2 strand steel barbed wire 2.24mm dia barbed with 2mm dia barbed with 2mm dia barbs at 75mm spacing and straining and fixing to any type of standard rails straining bolts incl securing or typing at crossing with and provn of galvanized mild steel wire staples or steel wire staples or steel pins etc as directed (each line wire to be measured) including taking down old barbed wire fence, complete all as specified and as directed.

All as per item No. 23 here-in before but except galvanized 2 strand steel wire, complete all as specified and as directed.

S & F mild steel work in framed work such as grills, gratings, etc. with ends of bars shouldered and /or riveted, or forged onto spikes, framed guard bars, barred iron doors, ladders, framed balusters, walk ways, railing, frame work of water tank and similar work conforming to E 165 (Fe-290) including two coats of synthetic enamel paint over a coat of red oxide primer, complete all as specified and as directed.

Fixed only mild steel work as in posts and struts in fencing including cutting tops to shape as directed, drilling holes, notching for wire, etc.; flat iron fillets (for securing wire mesh etc.) including all necessary drilling, bolting or riveting, etc., and similar work including embedding in cement concrete, complete all as specified and as directed.

M & L for 15mm thick plaster in cement mortar (1:4) n exc. 1 Sqm each patch, on brick walls, finished even and smooth without using extra cement including taking cement including taking down old cement plaster on brick walls, concrete surfaces, raking out joints, hacking for key, scrubbing down with water etc and finished the surface matching or existing colour finish, complete all as directed.

Dismantling fencing wire mesh any type including fillets and removing from site, complete all as specified and as directed.

Supply only chain link fencing made out 4mm dia galvanised iron wire of mesh 75mm x 75mm / 100mm x 100mm size made up to into mattress or cages, complete all as specified and as directed. Note :- Pre meter weight of chain link brought by the contractor shall be fixed through a BOO.

Fixing only new chain link fencing including line wires, any mesh size and type to any type of standards, rails, straining bolts, etc. including provision of binding wire etc., complete all as specified and as directed.

Straining & fixing old chain link fencing including any type of standards, rails, straining bolts, including securing or tying at crossing with and provision of galvanised mild steel wire, staples or steel pins, etc., complete all as specified and as directed.

Mild steel screw bolts (machine made) with hexagonal or square heads at one end and screwed the other, each srewed end to be fixed with one washer and one hexagonal nut, the other end to be embeded in RCC fencing post while casting for chain link fencing, dia of bolt 11 to 15mm and length of bolt exc 5cm but n exc. 10cm long, complete all as specified and as directed.

Dismantling of structural steel work including door, gate but excluding framed truss etc. and removing from site, complete all as specified and as directed.

M & L for preparation of steel surfaces of any description n.exc 10cm in width or girth and applying 2 coats of synthetic enamel paint (1st grade quality) over a coat of red oxide zinc chrome primer, complete all as specified and as directed.

M & L for preparation of steel surfaces of any description exc 10cm in width or girth and applying 2 coats of synthetic enamel paint (1st grade quality) over a coat of red oxide zinc chrome primer, complete all as specified and as directed.

M&L preparation of old painted steel surface of any description exc. 10cm in width or girth and applying one coat of synthetic enamel paint (1st grade quality), complete all as specified and as directed.

S & F in repair of concertina coil fencing with punched tape concertina coil 960mm dia 13m openable length having 53 Nos round per 6m length single coil, fixed on wall with existing angle iron 'Y' shaped with horizontal reinforced barbed wire 2.24mm dia barbed with 2mm dia barbs at 75mm spacing, stud tied with GI staples GI clips to retain horizontal, including necessary bolts or GI barbed wire tied to angle iron including taking down old concertina coil fencing, complete all as specified and as directed. Note : (i) Barbed wire shall be measured and paid under respective item. (ii) Per meter weight of concertina coil fencing brought by the contractor shall be fixed through a BOO.

Labour only for straightening deformed concertina coil to proper circular shape in position and properly securing by GI wire of not less than 2mm dia with existing MS angle frame, complete all as specified and as directed.

M&L for dismantling the strip from earth pit and testing of earth pit to be done as per fall of potential method mentioned in IS-3043 with digital earth resistance tester to check the healthiness of earthing system in and including replacement earth pit nut bolts with brass nut bolts as per required size and record should be kept on ledger duly signed by user representative, JE concerned and contractor and the same shall be submitted to Engr in charge for counter signature, complete all as specified and as directed. Note:- Testing of earth pit shall be done as and when required basis or as directed by Engineer-in-Charge from time to time. Note:- (a) Testing of each earthing shall be carried out at the interval of 1 months and measurement shall be done each time separately and test result shall be maintained in register properly duly signed with date by MES representative and contractor. (b) Pouring of water in each earth pit is deemed to be included in the rate quoted. (c) Necessary arrangement to be made by the contractor for pouring the water in earth pits vehicle reqd for carrying/storage of water (upto to the site) with helper will be arranged by contractor and deemed to be included in the rate quoted. (d) Cost of maintenance of carrying vehicle (if any) and cost of fuel reqd for veh is deemed to be included in the rate quoted.

Labour only for physical inspection for earthing and to check the healthiness of earthing system whether the resistance under safe limits of resistance, IF higher than the permissible then recharging of earthing should be done immediately with carbon based low resistivity compound of 0.001 ohm meter recharging of existing earth pit by excavating soil up to electrode depth approx 10 feet by manual drilling (post hole) method and filling with backfill compound / maintenance free earthing compound to achieve desired resistance value less than 1 ohms in and including water up to top of the excavated bore, backfilling of earth pit, measuring the value after refilling pit and testing of earthing after recharging, reconnecting grounding electrode conductor and earth grid applying petroleum jelly etc. to bolted joints to minimise corrosion for the pipe earthing or plate earthing then gel should be used to lower down the resistance, complete all as specified and as directed. Note:- (i) In case of satisfactory results not achieved or results degrade during one year of recharging of the earthing, the same shall be made good/recharged again in order to have required test results within contract/defect liability period without any extra cost to the department. (ii) Necessary earthing compound required for recharging shall be measured and paid separately.

Supply only carbon based low resistivity compound 0.001 ohm meter, backfill compound, complete all as specified and as directed.

M&L for dismantling of old existing PCC earthing pit with cover and S&F new polymer earth housing pit manufactured from heavy duty polypropylene material with sign board triangular shape, making connection of earth strip including minor adjustment, complete all as specified and as directed.

M&L for earthing with steel earth plate electrode 60×60cm.× 6mm thick , buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less'than 1.5 metres below normal ground level, connected to existing earth lead strip by means of bolts, nuts, check nuts and washers of brass or HS steel all as shown in electrical plate No. 5 connected to earthing test point and and necessary excavation and earth work PCC (1:2:6) type C-1 with suitable size of CI cover plate with angle iron frame and opening arrangement ) incl providing charcoal or coke and common salt in alternate layer of 15cm compacted thickness all around the earth electrode with funnel and 20mm bore galvanized iron watering pipe (light grade) wire mesh, copper lugs, complete in all respect,including galvanised earth lead wire 4.0mm, 40mm bore (medium grade) galvanized iron pipe up to earthing test point as directed, incl disposal of spoil to a distance not exc 50 mtr and necessary testing on completion, complete all as specified and as directed.

All as per ser item No. 43 here in before but using galvanised iron strip 32×6mm as earthing lead, complete all as specified and as directed.

All as per ser item No. 43 here in before but using copper plate 60×60cm ×3.15mm thick electrode and 20×3mm copper strip, complete all as specified and as directed.

All as per ser item No. 43 here in before but using magnesium-sulphate in lieu of common solt, all other description will be same, complete all as specified and as directed.

All as per ser item No. 43 here in before but using copper-sulphate in lieu of common solt, all other description will be same, complete all as specified and as directed.

Supply and installation of maintenance free earthing system comprises of molecularly bonded copper of 99.9% purity on low carbon steel of 3 m length, having a diameter of 25mm with copper coating thickness of 250 microns with fault current withstand capability of 30 KA rms value of 1 second and I peak of 80 KA (OBO Article type 25 3000 CCER), tested as per IEC 62561-2, meets the requirement of IS-3043 & IEC 60364-5-54, tested in CPRI for short circuit with standing capacity, OBO article type OEC 25 Earth conductivity enhancing mineral compound to be used as a backfill compound for earth electrodes; highly conductive in all weather conditions is used for improving the soil conductivity. The material shall be mineral inert to sub soil and shall not pollute the environment and non corrosive to earth rod. The material should have a resistivity less than 0.2 ohm -m. It should be free from hazardous substances. The mineral compound is required to have minimum 25 kg of the total composite, Universal clamp (OBO Article Type 25 25 RTC) made of SS 304 for clamping, Polypropylene & polyethylene (OBO type UFE) earth electrod inspection chamber with heavy duty cover should be used to cover the earth rod. The dimension shall be 170mm x 170mm x 190mm with a weight bearing capacity of 50 KN. including provision and laying galvanised steel flat 30 x 3mm thick from earth electrode to test joint directly in ground as required (Hot dip GI strip, corrision resistant - cross sectional area of 90 mm square, as per DIN EN 50164-2 (VDE 0185 Part 202) & VDE0185/305, IEC 62305, Zinc coating : 500 g/m square, 70 micron coating complete all as specified and as directed. Make : OBO/ABB/JMV/Ashlok Note :- Earth result after installation completely should be less than 1 Ohm.

Supply and fix in repair 32x6 mm GI strip in short pieces on surface or in recess for all interconnecting in and including taking out worn out and damaged strip, complete all as specified and as directed.

All as per ser item No. 49 here in before but Copper strip 20 x 3.15mm, complete all as specified and as directed.

All as per ser item No. 49 here in before but Copper strip 32 x 6mm, complete all as specified and as directed.

All as per ser item No. 49 here in before but galvanised wire 4mm dia, complete all as specified and as directed.

M&L for high density polethylene pipes 40mm bore (HDPE) of pressure rating 6 kgf/cm2 laid in trenches /walls and ceilings by MS iron clamp nuts bolts etc, with all fitting and fixed, complete all as specified and as directed.

All as per ser item No. 53 here in before but 15mm bore, complete all as specified and as directed.

Supply and fixing porcelain vitreous white/brown/green spacers insulator of size 75mmx35mmx40mm height complete with one number galvanized iron stud bolts 6mm dia x 40mm long including nut & washers and two number galvanized iron fixing bolts of size 6mm dia and 50mm long including washers and drilling holes for holding /foxomg aluminium strip/roof conductor as required including taking down the broken insulator, complete all as specified and as directed.

M & L test point terminal block made of gun metal or phosphorusbronze size 75x75x25mm drilled and screwed including 3 Nos. 8mm dia 25mm long hex. head screw, complete all as specified and as directed.

M & L for earthing pit in PCC (1:3:6) type C1 pre-cast RCC (1:2:4) type B-1 cover slab of size 300 x 300 x 50mm reinforced with 8mm dia TMT steel bars @ 15cm centre to centre in both direction and 10mm dia MS handle of suitable size including 29mm bore GI light grade pipe for watering, funnel, wire mesh, necessary earth work in soft/loose soil all as shown in electrical plate No 4 of MES schedule Part I and testing and applying three coats of white wash on exposed surface of concrete complete including taking down old one, complete as specified and as directed.

M & L for brazing of copper strip including removing of nut, bolt, washer, excavation etc and connecting with equipment directly from earthing, complete all as specified and as directed. Note:- An amount of Rs.74576.00 on account of credit schedule for schedule 'A' part - II shall be deducted from the total amount of BOQ to arrive at the contract sum.

SHRI PARTHA DUTTA

M/S ANIL KUMAR BAUL

MAA TARA TRADING

M/S. VINITA CONSTRUCTION

M/S RATHIN ENTERPRISES

M/S ASHOK ENTERPRISE

M/S BIJAY KUMAR SHIVA