REPAIR TO LEAKAGE SEEPAGE ROOF TREATMENT SUNKEN FLOOR, PLUMBING AT STRAND LINE AREA UNDER GE (CENTRAL) KOLKATA

Amount

Demolition Brick Work built in Cement Mortar including all Quoins, Arches, Pillars, etc, but excluding Ashlar Facings, dressed Stone Work and Pre-cast Concrete Articles of any descriptions, complete all as specified and as directed. Note:- Serviceable brick shall be stake for reuse.

Demolition of cement concrete of any description and in any position not otherwise specifically provided for all as specified and directed.

Dismantling Wrought Iron or Mild Steel Work, viz. MS Flat Iron (Wind Tie) and Similar Work including MS Bolts, Nuts, etc., complete all as specified and as directed.

Taking down Cement Plaster of any description on Brick Walls, Concrete Surfaces including racking out joints, hacking for key, scrubbing down with Water, remove dust, debris/ rubbish, etc., complete all as specified and as directed.

Taking up or down Steel Water Tubing 40mm dia (bore) including Connections and Fittings, Segregating Serviceable Pipes & Fittings, Stacking properly at Site(s) and keep in Safe Custody for re-use or removal to store complete all as specified and as directed.

Dismantling Plain or Corrugated Steel Sheeting any gauge, thickness, including nainital or similar roof coverings/sunshade, complete all as specified and as directed.

Dismantling of cast iron or reinforced concrete drain pipes, jointed in cement mortar and taking out of trenches of 100 mm internal dia complete all as specified and as direceted.

M&L Chipping of unsound/weak concrete materials of 50mm average thickness from columns/beams etc by any means including tapering all edges making square shoulders of cavities air or sand blasting etc and cleaning of exposed concrete surface of lightly picking material by air blasting or sand blasting incl foreign materials, loose concrete/aggregate etc upto any height of building including necessary scaffolding and safety measure complete all as specified and directed by Engr in charge.

M&L Chipping of unsound/weak concrete materials of 30mm average thickness from slabs/chajja/ fin fascia etc by any means including tapering all edges making square shoulders of cavities air or sand blasting etc and cleaning of exposed concrete surface of lightly picking material by air blasting or sand blasting incl foreign materials, loose concrete/aggregate etc upto any height of building including necessary scaffolding and safety measure complete all as specified and directed by Engr in charge.

M&L Removing concrete all around reinforcement including behind of reinforcement bars to give an average clearance of 25mm (but not less than 15mm clear air gap) by manual methods (hammering and using wire brushes, chieselling etc.) and applying alkaline rust removing chemical followed by removing rust including from behind the reinforcement bars by emery paper and cleaning the area throughly by water and alllow it to dry as per manufacturer's instructions to provide totally rust free finished steel surfaces, length of reinforcement bars cleared of concrete shall be measured for payment including upto any height of building, up to 16mm dia of bars complete all as specified and as directed by the Engr-in-Charge. Make:- Fosroc/Elantas beck/Kunal conchem/ Sika/ Hindcon Chemicals Ltd

Material and labour Cleaning of exposed concrete surfaces of lightly sticking materials including foreign materials, loose concrete/ aggregate etc and disposal of all debris upto distance of 50 m and applying single coat of epoxy bond adhesive on prepared non metallic surfaces (existing surface) by using brush as per manufacturers instruction / specification upto any height of building complete all as specified and as directed by the Engr-in-Charge. Make:- Fosroc/Elantas beck/Kunal conchem/ Sika/ Hindcon Chemicals Ltd

Exposing the corroded reinforcement and including 16mm dia of bar completely along its full circumference cleanced to remove all loose scale and corrosion deposit applying rust removing chemical followed by removing the rust by emery paper and cleaning the area throughly by water and allow it to dry as per manufactures instruction upto any height including necessary scaffolding and safety measures complete all as specified and as directed by Engr in charge Makes Fosroc/Elantas beck Kunal conchem

Supply and application Epoxy Zinc rich primer on the prepared reinforced surface by brush, the primer shall have a minimum specific gravity 1.75, minimum wet film thickness/coat 100 microns & dry film thickness/coat 40 microns. Minimum adhesive bond strength with steel is 1.5 N/mm2 upto upto any height of building complete all as specified and as directed by the Engr-in-Charge. Make:- Fosroc/Elantas beck/Kunal conchem/ Sika/ Hindcon Chemicals Ltd

Supply and application free flow non-shrink cementitious micro concrete to the affected beam, column etc. above 45 mm but upto 60mm thickness (average) where major spalling has taken place even the core of concrete affected. The Micro concrete shall have a minimum 1 day compressive strength of 10 MPa and 28 days strength of 50 MPa, Minimum tensile strenght 2 N/mm2 @ 28 days, minimum Flexural strength 5 N/mm2@ 28 days tested as per BS 4551-80, Expansion characterstics Unrestrained expansion as per ASTM C827-1987 1 to 4%. including necessary formwork, upto any height including necessary scaffolding and safety measures complete all as specified and as directed by the Engr-in-Charge. Make:- Fosroc/Elantas beck/Kunal conchem/ Sika/ Hindcon Chemicals Ltd

Supply and application Two component structural grade polymer modified reinstatement mortar where local spalling has taken place or shuttering is not possible. The Mortar can be applied from a minimum of 5mm to 15mm thickness in smaller vertical pockets and upto 100 mm thickness in horizontal applications. The Mortar should have a minimum compressive strength 12 N/mm2 in 1 day and 4 5N/mm2 in 28 days. Minimum Flexural strength should be 8 N/mm2 in 28 days. A modified styrene butadience emulsion for use as a bonding aid and gauging liquid for cementitous systems to be mixed with cement slurry before the application of microconcrete to be used @ 6 lit/bag of cement. The bonding agent should have minimum compressive strength 24 N/mm2 Minimum Tensile strength 3.5 N/mm2, Minimum Flexural Strength 6.5 N/mm2 including necessary scaffolding and safety measures complete all as specified and as directed by the Engr-in-Charge. Make:- Fosroc/Elantas beck/Kunal conchem/ Sika/ Hindcon Chemicals Ltd

M&L applying concure LP 90 or equivalent over concrete and cement plaster as curing compund as per manufactures instructions including necessary scaffolding and safety measures complete all as specified and as directed by the Engr-in-Charge. Make:- Fosroc/Elantas beck/Kunal conchem/ Sika/ Hindcon Chemicals Ltd

M&L Introducing new reinforcement bars for structural connections in RCC beam, lintels, columns and slabs etc including power drilling holes of appropriate diameters in reinforced or plain cement concrete to a minimum depth of 150mm upto 200mm including power drilling, fixing the reinforcement in position using epoxy after dusting of loose dust by blowing air, sealing the same with epoxy cartridges etc as per manufacturer instruction for upto 12mm dia of bar and up to four storey height of building complete all as specified and as directed by the Engr-in-Charge. Make:- Fosroc/Elantas beck/Kunal conchem/ Sika/ Hindcon Chemicals Ltd

M&L Brick work with fly ash bricks designation 75 (kgf/cm2) straight or curved on plan exc 6m mean radius built in CM (1:6) complete all as specified and directed.

M&L EXCEPT BRICK Brick Work using old bricks Straight or Curved on Plan exc. 6.0 Metre mean Radius, built in Cement Mortar 1:6, complete all as specified and as directed. Note:- Serviceable brick retrieved form demolition shall be used.

M&L for applying 15mm thick damp proff course to horizontal or vertical surfaces in cement concrete 1:2, over and including 50 micron thick polythene film, laid on a coat of bitumen primer @ 0.30 to 0.50 Kg per Sqm and applying a coat of blown type bitumen evenly at the rate of 1.50 Kg per square metre and blinding with clean dry sand @ 0.05 Cum per Sqm complete all as specified and directed.

M&L for applying 20mm thick damp proff course to horizontal or vertical surfaces in cement concrete 1:2, over and including 50 micron thick polythene film, laid on a coat of bitumen primer @ 0.30 to 0.50 Kg per Sqm and applying a coat of blown type bitumen evenly at the rate of 1.50 Kg per square metre and blinding with clean dry sand @ 0.05 Cum per Sqm complete all as specified and directed.

M&L Plain Cement Concrete type E2 (1:5:10) using 40 mm graded stone aggregate as in Mass Concrete of sunken floor complete all as specified and as directed.

Stripping of old tarfelt including layer of plaster or mortar of any type of treatment carefully from roof surfaces (without damage of roof) and roughening of surface of old concrete roofing by picking, sweeping, cleaning and washing down with water to remove dust complete all as specified and directed.

M&L 15mm thick screed bed or bedding layer in CM 1:4 surface finished even and smooth without using extra cement for padding including neat cement slurry @ 3.00 kg /sqm complete all as specified and directed.

M&L Water Proofing Treatment on existing cleaned RCC Roof with the following Specifications and Manufacturer's instructions, complete all as specified and as directed :- (a) Preparing and cleaning of fully dry surface as per IS:3067-1966. (b) Applying Bitumen Primer conforming to IS-3384-1986 over the Cleaned Plastered Surface @ 0.50 Litre per Sqm. (c) Applying a layer of APP based Polymeric Membrance; 3.0mm thick (minimum) weighing 3.60 Kilogram per Square Metre (reinforced) with Polyster Non Woven Fabric weighing not less than 160 Grams per Square Metre by Torch application. The overlaps shall be minimum 100mm on the Transverse direction and 75mm on Longitudinal direction. (d) Applying one coat of Aluminium Paint @ 0.10 Litre per Sqm over APP based Polymeric Membrane.

M&L Cutting out cracks to V-section in existing roofs or terracing, cleaning out, wetting, grouting with cement and sand slurry 1:3 complete all as specified and directed.

M&L Cutting grooves in brick wall, 75mm wide and 65mm deep and shaping horizontal face of groove with cement mortar 1:3 complete all as specified and directed.

M&L Cutting chase, pinning in making good to facings where required and pointing in cement mortar 1:3 to ends or edges of laddings, steps, cills, sushades, shelves, lintels etc and cutting chase for concealed water tubing or concealed coduit wiring etc and making good cutting grith n exc 10 cm girth on brick walls complete all as specified and directed.

M&L Mild steel Framed Work such as Grills, Gratings, etc. with ends of Bars shouldered and/or riveted, or forged into Spikes; Framed Guard Bars; Barred Iron Doors; Ladders; Framed Balusters; Walk Ways; Railings; Framework of Water Tanks and Similar Work, conforming to Fe-290, Gde-E-165, complete all as speci-fied and as directed.

M&L Rolled mild steel section as in main and cross beams, hip and jack rafters; purlins where connected to common rafters and running rails and guides for sliding doors; fixed with angle cleats or other connecting plates conforming to Fe-410-W (Gde-E-250) quality A complete all as specified and directed.

S&F Pre-painted colour galvalume aluminium zinc coating GI based corrugated steel sheet 0.50mm thick of any colour having tensile strength of 550 Mpa as in roof covering/ cladding to wall /sunshade etc, fixed with self tapping screws complete all as specified and as directed.

S&F old Pre-painted colour galvalume aluminium zinc coating GI based corrugated steel sheet any thickness of any colour as in roof covering/ cladding to wall /sunshade etc, fixed with self tapping screws EXCEPT SHEET complete all as specified and as directed. Note:- Serviceable roof sheet retrieved from dismantling shall be reused.

M&L Cement Concrete type C2 (1:3:6) using 40mm graded crushed stone aggregate 75mm thick as in Plinth Protection, etc. laid in alternate Bays, finished Concrete Surfaces Even and Smooth without using Extra Cement, complete all as specified and as directed.

M&L for 5 mm thick plaster on brick or concrete surfaces of ceiling/chajja in CM 1:3 and finished even and smooth without using extra cement complete all as specified & directed.

M&L Rendering 15mm thick in Cement Mortar 1:6 on Brick Walls or on Concrete Surfaces, finishing plastered surfaces Even and fair without using Extra Cement complete all as specified and as directed.

M&L 20 mm thick rendering in cement mortar (1:4) on fair faces of brick or concrete external surfaces in two layers (each 10mm thick) finished even and smooth without using extra cement using water proofing compound on top layer @2% by weight of cement or as per manufactures instruction on external wall surface upto height of 4th storied bldg complete all as specified and directed. Note : WPC shall be measured and paid seperately

"Supply only" liquid water proofing compound (ISI marked) complete all as specified and directed. Make:- STP NO 1/ PEDILITE(DR FIXIT)/ FOSROC/ CICO/ SIKA

M&L Preparing old decorated Plaster Surfaces of Wall and applying One Coat of acrylic distemper (any colour /tint) complete all as specified and as directed.

M&L Preparing new plastered surfaces of wall and applying Two Coats of Distemper Oil Emulsion over a coat of primer and applied over 3mm thick BIRLA/JK water proof wall care putty including rubbing with emmery paper to make wall surface smooth and even complete all as specified and directed.

M&L preparing new Surfaces of Ceiling and applying Three Coats of White Wash, complete all as specified and as directed.

M&L Preparing new Surfaces of Walls and applying Two Coats of Cement Base Paint over a coat of primer complete all as specified and as directed.

M&L Preparation of new steel surfaces of any description, over 10 Cm in width or girth, not otherwise described and applying two coats of synthetic enamel paint over a coat of red oxide primer complete all as specified and directed.

Supply and Laying Steel Water Tubing 40mm Bore (dia), Galvanised, ‘Medium Grade’ with all Fittings, fixed on Walls, Ceiling or laid in Floors or any other Situation, complete as all specified and as directed.

M&L old Steel Water Tubing 40mm Bore (dia), and connections with all new Fittings such as bends, elbows, tees, short pieces, connectors, back nut, reducer, diminishing pieces, caps, unions and plugs etc but EXCEPT STEEL TUBE and connection, in new or old position such as fixed on Walls, Ceiling or laid in Floors or any other Situation, complete as all specified and as directed. Note: Steel tube retrived from dismantling shall be reused.

S&F in repair CPVC pipes 40 mm outer diameter of SDR 11 & plain CPVC SDR 11 fittings fixed on Walls, Ceiling or laid in Floors or any other Situation, etc up to four stories height of bldgs. complete as all specified and as directed.

S&F Rotational Moulded Polyethylene (HDPE) Water Storage Tank 500Litre Capacity (Cylindrical Vertical with Closed Top), Black in Colour, Three Layered Construction, hoisted and fixed in Position all specified in MES Schedule Part-I including provision of 25mm x 100mm GI nippples with check nuts for inlet, outlet wash, float valve and overflow pipe including Lowering of old/unserviceable Water Storage Tank of any description, complete all as specified and as directed.

S&F Rotational Moulded Polyethylene (HDPE) Water Storage Tank 1000Litre Capacity (Cylindrical Vertical with Closed Top), Black in Colour, Three Layered Construction, hoisted and fixed in Position all specified in MES Schedule Part-I including provision of 25mm x 100mm GI nippples with check nuts for inlet, outlet wash, float valve and overflow pipe including Lowering of old/unserviceable Water Storage Tank of any description, complete all as specified and as directed.

Disconnecting existing tanks of capacity exc 500 but not exc 1000 liters setting aside (or lowering, hoisting if required) for repairs & scrubbing cleaning, thoroughly removing all scale and dirt, mud sediments, silts etc from the internal surfaces of PVC/RCC water storage tanks (bottom and wall) by using brushes, bleaching powder and other cleaning materials as required and removing vegetation around the over head tank after opening tank cover, inlet, outlet etc and reconnecting with GI/CPVC tubing and re-fixing in position ,refixing the tank including cover after cleaning in position , write date of cleaning by synthetic enamel paint on tank complete all and specified and directed.

Disconnecting existing tanks of capacity exc 1000 but not exc 2000 liters setting aside (or lowering, hoisting if required) for repairs & scrubbing cleaning, thoroughly removing all scale and dirt, mud sediments, silts etc from the internal surfaces of PVC/RCC water storage tanks (bottom and wall) by using brushes, bleaching powder and other cleaning materials as required and removing vegetation around the over head tank after opening tank cover, inlet, outlet etc and reconnecting with GI/CPVC tubing and re-fixing in position ,refixing the tank including cover after cleaning in position , write date of cleaning by synthetic enamel paint on tank complete all and specified and directed.

Disconnecting existing tanks of capacity exc 2000 but not exc 3000 liters setting aside (or lowering, hoisting if required) for repairs & scrubbing cleaning, thoroughly removing all scale and dirt, mud sediments, silts etc from the internal surfaces of PVC/RCC water storage tanks (bottom and wall) by using brushes, bleaching powder and other cleaning materials as required and removing vegetation around the over head tank after opening tank cover, inlet, outlet etc and reconnecting with GI/CPVC tubing and re-fixing in position ,refixing the tank including cover after cleaning in position , write date of cleaning by synthetic enamel paint on tank complete all and specified and directed.

S & F in repair PVC tank lid/cover for water storage tank capacity of 250 to 2000 ltrs to matching with existing tank with fixing arrangement complete all as specified and directed.

M&L repair for bathroom,WC outlet pipe junction/joints and rain water mouth pipe mouth with help of chemical component conbextar GP2 incl PCC 1:2:4 type B1 (20mm graded aggregate) as per manufacturer instruction complete all as specified and as directed.

S&F Cast Iron Nahani Trap with 100mm bore (dia) Outlet, with Gratings including jointing to Waste Pipe and fixed in Cement Concrete 1:2:4 (20mm graded aggregate), as in repair complete all as specified and as directed.

S&F Cast Iron Floor Trap with 100mm bore (dia) Outlet, with Gratings including jointing to Waste Pipe and fixed in Cement Concrete 1:2:4 (20mm graded aggregate), as in repair complete all as specified and as directed.

S&F Cast Iron Bend 100mm bore (dia), any radius, Disminishing Pieces or Tapers (Large Bore measured) and fitted with Oval Access Doors including Jointing with Cement Mortar 1:1, complete all as specified and as directed.

S&F Cast Iron Tee 100mm bore (dia) single (equal or unequal), ordinary or inverted (spigot or socket type) with Parallel Branches fitted with Oval Access Door including Jointing with Cement Mortar 1:1, complete all as specified and as directed.

S&F Cast Iron Soil, Waste and Vent Pipes 100mm bore (dia), Sand Cast, in any Length with or without Ears, with Cement Joints in Cement Mortar 1:1, fixed to Walls, including MS clamps nuts, bolts and washer complete all as specified and as directed.complete all as specified and as directed.

Refixing 100mm bore CI waste and vent pipe of any length with or without earswith Cement Joints in Cement Mortar 1:1, fixed to Walls, including MS clamps nuts, bolts and washer complete all as specified and as directed.complete all as specified and as directed.

Supply and fix in repairs Vitreous China squatting pan of ‘Orissa pattern’, size 580 mm x 440mm (white) with ‘P’ or ‘S’ trap, front or back inlet and foot rests, any pattern complete including provision of PCC bedding and connection to trap, and to flushing pipe, antisyphonage pipe, etc. complete including making good to floor all as specified and directed by the Engr-in-Charge.

S&F Vitreous China Colour Wash down Water Closet Pan (Pedestal Pattern) with "p" or "s" trap front or back inlet including fixing Bolts with and excluding 10 litre capacity low level Flushing Cistern matching with water closet colour with inlet ball valve float handle and providing 32mm dia PVC flush pipe including plastic water closet seat with flat botton cover (coloured) fixed with mild steel chromium plated or aluminium hinging device including taking down/out unserviceable Flush -ing Cistern and connected Items, complete all as specified and as directed.

S&F White PVC Flushing Cistern 10 Litre capacity, Low Level Valve Less, Syphonic Action type with Inlet, Ball Valve, Float and Handle including Cutting and pinning in Ends, making good disturbed Surfaces in Cement Mortar 1:3 and fixed including taking down/out unserviceable Flush -ing Cistern and connected Items, complete all as specified and as directed.

S&F PTMT Ball Valve 20mm dia having mini -mum weight 210 Grams, high pressure with epoxy coated Aluminium Rod and high density Plastic Ball, screwed for Iron Pipe and fixed as in repair, complete all as specified and as directed.

Cutting/uprooting of tree from walls of bldgs. up to extended root and spraying of acid of required qty at any location of bldg up to 4 storied & making good disturbed surfaces with CM 1:4 or cement concrete (1:3:6) type C1 using 20mm graded aggregate including necessary scaffolding/ through rope with safety belt for size of tree of girth 5 to 10 cm complete all as specified and as directed by Engr -in-charge.

M&L in repairs for leaking water in brass/CP bib tap, pillar tap, concealed stop cock, angle valve of any make/ description/size in any position by replacing the (brass spindle+brass jumper washer) ,tightening of fittings etc ,also removing air lock, blockage in water pipe line & make the all system fully functional to the entire satisfaction of Engr-in-Charge complete all as specified and directed

M&L, in repairs, for (PVC Syphon assembly (internal kit) for any type/size/make of low level flushing cistern,tightening of fittings etc & make the all system fully functional to the entire satisfaction of Engr-in-Charge complete all as specified and directed.

Cleaning and removing all debris / vegetation from RCC roof surfaces of any height and cleaning the mouth of rain water pipe and removal of materials to a distance outside residential area complete all as specified and as directed by Engr-in-Charge.

M&L for Repair for joint leakage in steel water tube by replacing of GI elbow/socket/reducers/nipple/union/bend/tee of any length 15mm bore medium grade ISI mark of complete all as directed.

M&L for Repair for joint leakage in steel water tube by replacing of GI elbow/socket/reducers/nipple/union/bend/tee of any length 20mm bore medium grade ISI mark of complete all as directed.

M&L for Repair for joint leakage in steel water tube by replacing of GI elbow/socket/reducers/nipple/union/bend/tee of any length 25mm bore medium grade ISI mark of complete all as directed. Notes for item No.67.00 to 69.00: 1. Unit rate quoted by tenderer shall included for use of all scaffolding, trestles, ladders, cradles etc, hoisting, lowering and protective measures etc up to four storeys height of bldgs being external works of building. 2. Cost of taking down steel water tube & refixing old steel water tube and connection in new or old position with new fixing arrangment in walls, ceiling, floors etc Shall be included in the rates quoted by the contractor.

Repair for joint leakage in CPVC water tube by replacing of CPVC elbow/socket/reducers/nipple/union/bend/tee of any length 20mm nominal bore SDR 13.5 complete all as directed.

Repair for joint leakage in CPVC water tube by replacing of CPVC elbow/socket/reducers/nipple/union/bend/tee of any length 25mm nominal bore SDR 11.5 complete all as directed. Note: Notes for item No.70.00 to 71.00: 1. Unit rate quoted by tenderer shall included for use of all scaffolding, trestles, ladders, cradles etc, hoisting, lowering and protective measures etc up to four storeys height of bldgs being external works of building. 2. Cost of taking down & refixing of CPVC tube and connection in new or old position with new fixing arrangment in walls, ceiling, floors etc Shall be included in the rates quoted by the contractor.

S C ROY AND CO (BID ID -3201778)

AUTO ELECTRICALS (BID ID -3201961)

SPS TRADING (BID ID -3202118)

SPECIAL CONCRETE AND CONSTRUCTION CO. (BID ID -3201447)

R T BUILDERS (BID ID -3201492)

MS JYOTI INDUSTRIES (BID ID -3201418)

SK CONSTRUCTION SYNDICATE & ENGG CO (BID ID -3201561)

M/S BISWANATH BHATTACHARJEE (BID ID -3201648)