REPAIR/MAINT OF ELECTRIC INSTALLATIONS AND MAINT OF EARTHING INFRASTRUCTURE, LIGHTNING ARRESTORS AT VARIOUS BUILDING AT CIJW SCHOOL VAIRENGTE, LAILAPUR AND BAGHA UNDER GE SILCHAR

Amount

B and R Division Items

Demolition of brickwork or stone / boulder masonry, built in cement mortar and disposing off complete all as specified and as directed.

Demolition of cement concrete (un-reinforced) in ground floors and pavings not exceeding 15cm thickness (below or above ground level) and removal of debris complete all as specified and as directed.

Demolition of Concrete(reinforced) of any description and in any position not otherwise specifically provided complete all as specified and as directed.

Dismantling of rain water/sewage pipe of any type and any size including fitting complete all as specified and as directed.

Dismantling fencing wire mesh any type any size complete all as specified and as directed.

Dismantling posts or struts (wood, steel or RCC) any section, embedded in concrete, brick work, masonry, etc. including taking out embedded portion and making good disturbed ground complete all as specified and as directed.

M & L for use and waste formwork to sides of concrete foundations, bases of columns, rafts, raft beams, plinth beams and similar works, vertical or to batter, for rough finished flat surfaces of concrete complete all as specified and as directed

Use and waste Formwork to sides and soffits of floor or roof beam, beam hunching, girder, lintels, cantilever, shelves including supports, etc for rough finished flat surfaces of concrete complete all as specified and as directed.

M & L for PCC 1:3:6 type C2 using 40 mm graded broken stone aggregate as in foundation, filling and mass concrete complete all as specified and as directed.

M & L for PCC 1:2:4 type B1 with 20mm graded aggreagate as in lintal, coping , benching incl necessary formwork complete all as specified and as directed.

M & L for providing Reinforced Cement Concrete M15 (1:2:4) type B1 using 20 mm graded stone aggregate as in beams, cantilever, lintels over 1.5 m complete all as specified and directed.

M & L brick work with sub class ‘B’ brick old size bricks straight or curved on plan exe. 6 meters mean redius built in cement mortar 1:6 complete all as specified and as directed.

M & L for 15 mm thick rendering in cement mortar (1:4) on fair face of brick or concrete surface finished even and fair without using extra cement complete all as specified and as directed.

S & F 150mm dia PVC (SWR) pipes single socketed, in any length, laid in trenches or in floors / fixed to walls complete all as specified and directed

M & L for 10mm dia and over TMT bars, cut to length bend to shape as required including cranking, hooking etc and binding with and including mild steel wire (annealed) not less than 0.9 mm dia complete all as specified and directed.

S & F mild steel TMT bars 5mm dia and overup to and including 10mm dia as stirrups, spacers etc. , cut to length bend to shape required including cranking bending spirally for hooking ends and binding with and including mild steel wire n.less than 0.90mm dia complete all as specified and directed.

S&F MS joist, channel, angle, or tee sections, (conforming to Fe 410-W (Gde-E-250) quality-A) fixed independently, without connecting plates, etc. (cut to ordinary lengths i.e. within 20mm of the length indicated) complete all as specified and as directed.

S&F in repair galvanised 2 strand, steel barbed wire 2.24mm dia barbed with 2mm dia barbs at 75mm spacings and straining and fixing to any type of standard rails straining bolts, including, securing or tying at crossings with and provision of galvanised mild steel wire, staples or steel pins, etc. (each line of wire to be measured)complete all as specified and as directed.

Supply only chain link fencing MS galvanised any size or type complete all as specified and as directed.

Fixing only chain link fencing including line wires, any mesh, size and type, to any type of standards, rails, straining bolts, etc. including provission of binding wire complete all as directed by Engr-in-Charge

Supply only mild steel deformed round bars 8 mm dia, conforming to Fe-290 (Gde-E-165), as in line wire of chain link fencing complete all as specified and as directed.

S&F for mild steel screw bolts (machine made) with hexagonal or square heads at one end and screwed the other, or screwed both ends, each screwed end to be fitted with washers and one hexagonal or square nut, length of bolt nexc 5cm long and dia of neck 11 to 15 mm complete all as specified and as directed.

M & L preparation of newly plastered / unplastered surfaces and applying three coats of white wash on walls, etc. complete all as specified and as directed

M&L for preparing of new steel / metal surfaces of any description over 10cm in width or girth and applying two coats of synthetic enamel paint (tint as approved) over a coat of red oxide zinc chrome primer complete all as specified and as directed

E and M Division Items

Disconnecting/taking out old existing unserviceable earthing any type as per site condition complete all as specified and as directed.

M&L for GI protection pipe of size 40 mm bore light grade with fittings as reqd at site complete all as specified and as directed.

M&L for GI protection pipe of size 20 mm bore light grade with fittings as reqd at site complete all as specified and as directed.

M & L for cutting of PCC foundation of size 5cm width and 10 cm depth for passing of GI protection pipe 20mm dia and making/matching good as existing surface level and colour complete all as specified and as directed.

M & L for galvanised iron 4.0 mm dia earth continuity conductor fixed to main DB's or as directed situation complete all as specified and as directed.

M & L for galvanised Strip of size 25 x 4 mm earth continuity conductor fixed to main DB's /panels or as directed situation complete all as specified and as directed.

S&F in replacement of Aluminium strip of size 25 x 3 mm as earth continuity conductor or main earthing lead to wall on insulator or recess or chases or burried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc as required complete all as specified and as directed. Note :- Porcelian/suitable insulators with nut, bolts, screws for fixing strip at the span of one meter and for fixing the strip on high rise bldgs not more than 20 Mtrs to be included in the quoted rate.

Earthing complete with galvanized steel earth plate electrode 600 x 600 x 6 mm buried directly in ground (earth pit not less than 2.25 mtr deep below ground level) with top edged of the plate not less than 1.5 mtr below ground level connected to galvanized iron earth stip of size 25x4 mm by means of bolt, nut, check nut and washer of galvanized iron or steel protected by galvanized iron pipe of 40 mm bore light grade, incl. funnel, 20 mm dia bore galvanized iron pipe medium grade for watering, wire mesh, charcoal or coke and common salt in alternative layers all around the earth electrode compacted thickness 15 cm incl. excavation and earth work, PCC 1:3:6 type C2, CI pit cover, incl. disposal of surplus soil to a distance n. exc. 50 m, complete testing on completion, all complete as shown in electrical plate No 3, SSR Part-I all as specified and directed.

Earthing complete with Copper earth plate electrode 600 x 600 x 3.15 mm buried directly in ground (earth pit not less than 2.25 mtr deep below ground level) with top edged of the plate not less than 1.5 mtr below ground level connected to Copper earth stip of size 20x3.15 mm by means of bolt, nut, check nut and washer of galvanized iron or steel protected by galvanized iron pipe of 40 mm bore light grade, incl. funnel, 20 mm dia bore galvanized iron pipe medium grade for watering, wire mesh, charcoal or coke and common salt in alternative layers all around the earth electrode compacted thickness 15 cm incl. excavation and earth work, PCC 1:3:6 type C2, CI pit cover, incl. disposal of surplus soil to a distance n. exc. 50 m, complete testing on completion, all complete as shown in electrical plate No 3, SSR Part-I all as specified and directed.(100 % Copper Will be Required)

Earthing complete with galvanized steel earth plate electrode 600 x 600 x 6 mm buried directly in ground (earth pit not less than 2.25 mtr deep below ground level) with top edged of the plate not less than 1.5 mtr below ground level connected to galvanized iron wire of size 4.0 mm by means of bolt, nut, check nut and washer of galvanized iron or steel protected by galvanized iron pipe of 15 mm bore light grade, incl. funnel, 20 mm dia bore galvanized iron pipe medium grade for watering, wire mesh, charcoal or coke and common salt in alternative layers all around the earth electrode compacted thickness 15 cm incl. excavation and earth work, PCC 1:3:6 type C2, CI pit cover, incl. disposal of surplus soil to a distance n. exc. 50 m, complete testing on completion, all complete as shown in electrical plate No 3, SSR Part-I all as specified and directed.

Supply Installation Testing & Commissioning of Ring Earth Pit which includes the Installation of following (a) Digging /Auguring /Boring of Five Single Earth Pits of 100 mm to 125 mm. Dia to the depth of approx. 2.8 meter. (b) Insertion of 17.2 mm x 3000mm Earth Electrode of low carbon steel with molecularly bonding of electrolytic grade copper coating (purity 99.9%) having min. 250 microns thickness shall comply with Specification IEE 80- 2013 & IS 3043-2018 and penetrating it at least 0.2 meter by pushing gently with sledge hammer where the natural soil is assumed for all five pits. (c) Filling of Earth pit with Earth Enhancement Compound (ITPC-EECP15) in slurry form and backfilling. (d)Job of Exothermic Welding Material for bonding the earth system shall be as per RDSO specs, which includes graphite moulds, clamps weld metal powders. (e) Carrying out exothermic weld connection job on the single earth electrode to a copper tape of 150 x 25 x 6 mm. (f) Carrying out exothermic weld connection job on the copper tape of 150 x 25 x 6 mm of on master Earth Electrode for connecting two 35 Sqmm cables for redundancy. (g) MEEB of size 300 x 25 x 6 mm is to be fixed inside the equipment room with two insulation studs. (h) 300 x 300 x 300 mm (inside dimension) concrete Earth Pit with a concrete lid, approx. 50 mm thick with pulling hooks, shall be provided to cover the pit. Back side of the cover will be painted in black and date of the testing and average resistance value shall be written.

(j) Except the master earth pit all the remaining earth pits are to be buried in the ground. (k)Digging of trench to min depth of 0.5 m and laying 20 x 3 mm bare copper tape connecting all the five Earth Pits. (l) Routing and laying 20 x 3mm copper tape connecting all the five Earth Pits. (m) Carrying out exothermic weld connections job on all the five Earth Electrodes to Copper tape of size 20 x 3 mm for interconnection of earth pits. (n) It shall be ensured that the distance between any two earth electrodes shall be minimum 3 m and max. Upto twice the length of the Earth Electrode to avoid mutual resistance effects. Make: Kratonite/ITPC-chem/Ashlok/Sofamel/Inpocon/Maltep

Supply only Magnisium Sulphate (MgSo4) for earthing pit complete all as specified and directed.

Supply and fixing of copper strip size 20 x 3 mm as earth continuity conductor or main earthing lead fixed to wall on insulator or recess or chases or burried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc as required complete all as specified and directed. Note :- Porcelian/suitable insulators with nut, bolts, screws for fixing strip at the span of one meter and for fixing the strip on high rise bldgs not more than 20 Mtrs to be included in the quoted rate.copper earth strip will be connected by brazing only to another any portion of copper strip .

Supply and fixing in replacement of unserviceable LT Feeder Pillar Box out door type 1.1 KV made out of MS CRCA sheet of size 3.15 mm thick with CRCA sheet powder coated, having 4 Nos Aluminium bus bar of size 200 Amps for phase ( 40 mm x 5 mm ) and 100 Amps ( 20 mm x 5 mm ) for neutral fixed on LT 8 Nos insulators of size 0.60 M x 0.45 M X 0.45 M with 04 legs made out of MS angle 50 X 50 X 5 mm & 0.75 Mtr in length with locking arrangements with SS aldrop each side, front and back opening , danger board,gland suitable for 150 sqmm cable 4 core -02 Nos and including FPB foundation with suitable PCC work and Excavation and incoming and out going connections and testing on completion, complete all as specified and directed.

Material and labour for Maintenance of earthing including measurement of Earth resistance and earth to neutral voltage of earthing any type (Chemical/Conventional & Grid earthing) pertaining to various locations with proper calibration earth tester and recording the reading in a register and take appropriate action such as pouring of salt mixed water in earth pit, replacement of blocked rusted funnel, tightening the earth strip through nut, bolts and washers, replacing old rusted worn out nuts and bolts with new complete all as specified and directed.

Note:- (i) The Contractor or his rep will attend the office of AGE E/M vairengte in domestic area of CIJW School daily for collection of complaint slip at 0900 hrs. (ii) The Contractor must provide manpower (one skilled and one unskilled) to carry out earth pit resistance check of each section of entire CIJW School every month (approximate No. of earthing is 100) and will enter the value of each earth pit and obtain signature of user rep as well as JE E/M. (ii) The earth resistance checking equipment including all necessary T&P items shall be provided by the contractor and the cost of the same to be included in the quoted rate. (iii) The cost of material such as funnel, common salt, charcoal, magnisium sulphate (MgSO4) etc will be paid under relevant item of this schedule as supply only however the cost of nut bolts shall deemed to be included in the quoted rate.

Re-fixing of existing GI/COPPER strip 32x6 , 25x4 ,20X3.15 mm size over porcelain shaddle on wall,floor,roof with complete acessories complete all as specified and as directed.

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 fixed to poles or any other indicated situation for loop earthing etc. as required 2mm dia galvanised iron wire complete all as specified and as directed.

Supply & Fix 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 fixed to poles or any other indicated situation for loop earthing etc as required 32 x 6mm galvanised iron strip complete all as specified and as directed.

Supply & Fix Copper strip 32 x 6mm buried in ground complete all as specified and as directed.

S&F Air termination,single pointed,copper rod 12mm dia and 300 mm long complete all as specified and as directed.

S&F Test point terminal block made of gun metal or phosphorus bronze 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 cost for writting of following lettering on the Earth pit marker / indicator (a) Type of earthing like as Chemical or Copper plate or GI plate or GI wire or Copper strips (b) Location (c) Pit No (d) Results (e) Date of Testing complete all as specified and as directed.

M & L for Refixing of existing serviceable copper / aluminium / GI strip on top of "V" type procelain insulator suitable size , brass nuts and bolt ,screws, aluminium cleats etc.(Procelain insulator if replaced shall be measured separetly)duly straightened properly complete all as specified and as directed. Note: The distance between two porcelain insulator should be one meter.

S & F Back Fill compound conductolite (BFC Conductolite ) ground enhancing material in conventional copper earthing on chemical earthing depends upon the ground condition complete all as specified and as directed. Make: Ashlok or equivalent

M&L for cleaning all unwanted vegetation from surrounding of earth pit, within the radius of 1 Mtr apart, cleaning inner side and out side of earthing pit complete all as specified and as directed.

Taking out old unserviceable earthing pit of any type complete with connected accessories including dismantling and removing materials from work site complete all as specified and directed.

M/S SUBHAM ENTERPRISE (BID ID -3384789)

M/S TAPAN KUMAR RAY (BID ID -3384180)

M/S PIJUSH BHATTACHARJEE (BID ID -3384151)

M P SHARMA (BID ID -3384273)

M/S R A ENTERPRISE (BID ID -3384678)