SPECIAL REPAIR TO 20,000 GALLON MAIN OVERHEAD TANK OF NCB AREA AT SSB DIAMOND HARBOUR UNDER GE (I) CGN) KOLKATA

Amount

(CIVIL WORK) Taking down cement plaster on brick or stone walls surafce of overhead tank of approx 21 meter height, etc, including raking out joints, hacking for key, scrubbing down with water, complete all as specified and as directed. (Note:- Scaffolding required shall be measured and paid separately).

Material and labour for rendering 20 mm thick (in two coats of 15 mm and 5 mm thick) on brick or stone walls surafce of overhead tank of approx 21 meter height in cement mortar 1:6 with integral water proofing compound with external coat finished even and fair complete all as specified and as directed. Note: - Water proofing compound shall be measured and paid for separately.) (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for identifying and marking carefully the damaged reinforced concrete of surafce of overhead tank of approx 21 meter height by tapping with light hammer and chipping of unsound weak concrete and plaster material from slabs/ beams /columns etc. with hand driven chisel as directed by the engineer-in-charge upto 25 mm average depth including saw-cutting of all edges making square shoulders of the cavities and de-rust existing reinforcement with electrically operated rotary grinders with cup-brush, wire brush or sand paper complete all as specified and as directed. (All loose unsound and cracked concrete shall be removed out side MD land) (Note: thickness will be measured excluding plaster) (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for providing TMT bars any dia in various structural RCC elements like columns, beams, Slabs of overhead tank of approx 21 meter height etc. including cutting, bending, fixing of bars with welding/ tying as required at site with & including binding wires etc. and all relevant works like anchoring of the bars in the existing RCC Members,complete all as specified and directed. (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for preparing new plaster wall surfaces of over head tank of approx 21 meter height including chajjas, facias etc. and applying two coat of weather proof acrylic exterior paint (100% Acrylic) over a coat of primer complete all as specified and as directed. (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for cutting the V groove up to 25 mm depth along the crack and separation gap and Providing and applying epoxy bonding agent of approved brand coverage and specification of manufactures (Mixed density : 1.48 Kg/Ltr, adhesive bond strength to be >2.50MPa) and filling the groove with polymer modified concrete upto 25mm thick. Hand trowel application of PMC (Free flowing non shrink repair and could get compressive strength of 35 Mpa at 28 days complete all as specified and as directed. (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for drilling the RCC Members in 12 mm dia, 50 to 100 mm deep at the interval of 300 to 500 mm in staggered manner or as directed by Engineer-in-Charge, cleaning the holes by air blower/ water jet and providing and fixing the Teflon nozzle of 12 mm dia in cleaned holes. External end of nozzles to be machine to receive outlet of grouting gun to fix inside the holes by applying thixotropic epoxy putty to ensure complete sealing , cure the system for min 12 hrs and cutting of nozzles by chisel after completion of grouting without damaged structural element complete all as specified and as directed. (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for Grouting injecting Elastic polyurethane injection resin by pressure and using injector with accessorises till nozzles refused the accept the grout including, mixing of materials, mixing material components quantities as per manufacturer’s instruction by weight batching grouting fill the grouting gun with material maintain desired pressure in the gun air by compressor maintain the pressure at exit ( 3 to 4 kg / cm2 ) by monitoring pressure gauge at exit gout the material through pre fixed nozzles in the structural elements till its refusal . seal the nozzles with putty after the refusal , monitor leakages through other nozzles while grouting and seal them as per requirement complete all as specified and directed.

Material and labour for cleaning rust from rusted reinforcement bars by using alkaline rust remover painted with brush and removing rust with flex, (after 24 hrs of application of rust remover) with the help of wire brush, sand paper or any other suitable devices and throughly washed with water with the help of pressure jet and allowing it dry complete all as specified and as directed, only area of cleaned steel bar shall be measured for payment. (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for providing, mixing and applying over reinforcement bars zinc antirust agent in two coat at interval not less than 4 hours and as per specificatin and direction of Engr-in-Charge. (Dosage/coverage as per manufacture specification of two component epoxy based zinc rich primer steel as a protective coating to steel reinforcing bars in concrete with total zinc content in dry film>90% by volume and DFT per coat>50 microns).(NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for providing and applying Epoxy bonding agent of approved brand. Coverage and specification of manufactures (Mixed density : 1.48 Kg/Ltr, adhesive bond strength to be >2.50MPa) complete all as specified and as directed. (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for providing polymer modified mortar up to 20 mm thick (Total thickness 20mm) as per manufacturer's instruction and Hand trowel application including levelling, profiling etc. complete all as specified and as directed. (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for providing polymer modified mortar exceeding to 20 mm but not exceeding 40 thick (Total thickness 40 mm) in two layer, each layer not exceeding 20 mm thick as per manufacturer's instruction by using Hand trowel including levelling, profiling etc. complete all as specified and as directed. (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for wax based white pigmented liquid curing compound, based on paraffin and also white pigmented to substantially increase light reflectance to effectively prevent premature water loss from the concrete both due to heat of hydration and sunlight, confirming to ASTM - C 309-89 Type 2 Class A, apply using low pressure sprayer uniformly on plaster surface, complete all as specified and as directed and as per manufacturer’s instruction. (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labuor for preparation of the concrete surface and apply two coat of food grade paint over and including one coat food grade primer as approved by GE complete all as specified and directed. (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for providing and laying micro concrete cement based prepacked single component, chloride free, sulphate free, non-shrink, free flow, self compacting, ready to use after mixing water in specified proportion of approved quality. Rate shall be include with new plywood shuttering board cost and supporing jack system/prob to support the shuttering plate. Shuttering plate will be used in patch repair job so shuttering item will be included in this application of High strength, dual- shrinkage compensated, micro- concrete for placing in nominal thickness exceeding 40 mm for concrete repair with compressive strength for slab/column (ASTM C 109, 7cm cube) of 25MPa at 28 days complete all as specified. (Note : For payment purposes, actual weight of mircoconcrete used shall only be considered). (NOTE:- Scaffolding required shall be measured and paid separately).

Material and labour for providing and fixing double scaffolding system (cup lock type) on the exterior side of bldg/ structure, upto 25m height, above ground level, including additional rows of scaffolding instepped manner as per requirement of site, made with 40mm dia MS tube, placed 1.5m c/c, horizontal & vertical tubes joint with cup & lock system in the scaffolding for working platform etc and maintaining it in a serviceable condition for execution of work of cleaning and/or pointing and/or applying chemical and removing it thereafter the scaffolding system shall stiffened with bracings, runners, connecting with the bldg etc, wherever required, if possile, for inspecting of work at required location with essential safety features for the workmen etc complete all as specified and directed by engr-in-charge.

(E/M WORK) Excavating in trenches not exceeding 1.5 m wide and not exceeding 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc. or for cable laying or water supply pipes lines etc or not exceeding 10 sqm on plan and not exceeding 1.5 m in depth and getting out in soft/ loose soil complete all as specified and as directed.

Removing excavated material (soils) not exceeding 50 m and depositing where directed at a level n exc. 1.5 m above the starting point complete all as specified and directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25 cm in soft/ loose/ hard/ dense soil complete all as specified and as directed.

Supplying & laying in repairs in trenches 100 mm nominal dia ductile iron pressure pipe for water mains, centrifugally cast, spigot and socket ends (for push on joints), class K9 in any length complete all as specified and as directed. Note- Rubber gasket joints (push on joints) shall be measured and paid separately.

Material and Labour in repairs for Ductile Iron specials like Bends (any type, radius and angle) tapers any type (straight, bend, increasing, decreasing or double socket etc) Tee pieces single branch "Y" junction, double branch, cross (all sockets or socket and spigot) collars, caps and plugs for DI pipe upto 100mm nominal dia for mechanical and push on flexible joints for cast iron or ductile iron pressure pipe lines complete all as specified and as directed.

M&L for Cutting / drilling the existing pipe any type and 100 mm dia including fabrication work, flanges, washer nut-bolts for CI/DI/GI tee, bend, tapper, flange etc all necessary items all as specified and as directed.

Supply and fix forin repairs 100 mm dia D.I. resilient (soft) seated gate valve with pocket less body, ss stem (AISI 410), EPDM coated di wedge 100% vaccum tight design with toroidal sealing rings & over 250 micron epoxy coating in PN16 designed to BS:5163/IS:14846 non-rising stem type with hand wheel operation complete all as specified and as directed .

M & L for run lead joint for spigot and socket cast iron pipes and fittings of nominal bore 100 mm complete all as specified and as directed.

Supply and fix in repairs Air termination (vertical conductor), single pointed aluminium rod 12 mm dia and 300 mm long including suitable design of fixing components of gun metal as per fig 30 of IS 2309: 1989 all as specified and as directed.

Material and labour in repairs 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 all as specified and as directed.

Supply and fixed in repairs aluminium strip 25 mm X 3 mm for horizontal conductors and down conductors including suitable design of fixing components of galvanised steel as per fig 28 of IS 2309: 1989 complete all as specified and as directed.

M & L for earthing complete with galvanised steel plate earth electrode 600 mm X 600 mm X 6 mm 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 earthing lead of 25 mm X 4 mm galvanised mild steel strip by means of bolts, nuts, check nuts and washers of galvanised iron from earth plate to test point upto 7.5 metre including all as shown in electrical plate No. 3 of SSR Part I (2009) including necessary concrete chamber in cement concrete M15 (Nominal Mix) using 20 mm nominal size coarse aggregate, precast RCC cover slab in cement concrete M15 (Nominal mix) using 20 mm nominal size coarse aggregate of size 40 cm X 40 cm X 5 cm reinforced with 8 mm dia TMT bars @ 150 mm c/c with one handle for lifting made out of 8 mm dia bar, GI funnel, GI wire mesh filter, 20 mm dia GI pipe medium grade for watering, 40 mm dia GI pipe medium grade for protection of earthing lead, charcoal or coke and salt in alternate layers including necessary excavation and earth work in any type of soil/ strata and testing complete all as specified and as directed by the Engineer-in-charge.

Material and labour for solar aviation light with ultra-bright intensity LED, 3.5 to 5.7 KM range, fitted with monocrystalline silicone type solar of 1.8 watt and 6 AH LiFePO4 rechargeable battery, level 70/100 Lux complete all as specified and directed

Material and labour for two coat of synthetic enamel painting over a coat of red oxide primer after scraping, cleaning surface with the help of sand paper / wire brush of the complete and after cleaning of surface, painting with the help of painting brush for all water pipe of OHT as follow. Blue colour for raising pipe, Green colour for delivery pipe and Yellow colour for Back wash /over flow pipe incl accessory and Black colour for Sluice valves with wheel red in colour all as per IS colour coding complete all as specified and directed. Note:- colour coding for any type of piping system shall be as approved by GE

HIGH HILLS ENTERPRISE

M/s Santosh Industrial Corporation