Renovation of B40 and window replacement in A07 at RBI Officers Quarter, Ultadanga, Kolkata (West Bengal)

Dismantling work of plumbing / sanitary fitting / waterproofing works / counter etc in Kitchen, WC and Bathroom: Disconnecting, dismantling and disposal of the following: (i)Carefully disconnecting, plugging wherever required and dismantling the existing plumbing / sanitary fittings / fixtures and lowering down & stacking the same neatly. (ii)Carefully dismantling the existing flooring in Bathroom / WC along with its bed mortar, brickbat coba, waterproof treatment, etc. up to base concrete / mother slab as per site requirements (Approximate Qty. 1.60 Cum.) (iii)Carefully dismantling the existing cement concrete / kadappa stone platform in kitchen (iv)Carefully dismantling by manual means the existing door frame including door shutter with holdfasts, anchors, etc. without disturbing adjoining walls (2 Nos. Doors with area less than 3.00 Sqm) (v)Disposing of the generated building rubbish / waste material / malba / similar unserviceable articles, by manual means, including loading, transporting, unloading to approved municipal dumping ground as approved by Bank’s Engineer including all leads & lifts involved Rebate for taking the dismantled salvageable items will be given under item no. 41

Dismantling of existing wall/dado tiles/mosaic: Carefully dismantling existing wall tiles / dado in Bathroom / WC / kitchen / balcony and disposal of dismantled materials from the premises including loading, transporting, unloading to approved municipal dumping ground as approved by Bank’s Engineer including all leads & lifts involved. Rebate for taking the dismantled salvageable items will be given under item no. 41

Dismantling / disengaging and removing the existing Mild Steel (M.S) windows having area less than 3.00 Sqm per window: Carefully dismantling and removing the existing Mild Steel (M.S) windows, along with M.S / wooden outer frames, shutters, glass, fittings / fixtures / fasteners, hardware etc., shifting and disposing the dismantled and removed materials including the salvageable materials at location(s) shown by the Bank’s Engineers within the Bank’s premises in an organised manner, carting the debris and non-salvageable items away from the colony premises and dumping them at a dumping yard, authorized by Kolkata Municipality Corporation or any other local body authorities etc., complete as directed by Bank's Engineer. Care should be taken to avoid damages to the structural members, other installations, fittings & finishes including dado on both internal and external surfaces of the walls, free falling of dismantled materials including glass panels etc., during the dismantling, shifting, and disposing. Any damage(s), accidentally caused to the structural members, other installations, fittings, finishes including dado on both internal and external surfaces of the walls etc., shall be mended to reinstate the same to their original condition(s). The scope of work shall include temporarily closing the openings left on the wall(s), after removal of the windows, by providing and fixing 6mm plywood panels / planks & tarpaulins, till such time the new windows are installed in those openings. Rebate (scrap / buy-back value) for taking away the salvageable items shifted and stacked shall be considered separately under item No. 41 below.

Brickwork: Providing and constructing half brick masonry wall in superstructure using locally available 1st class bricks for partitions in cement mortar 1:4 (1 cement: 4 sand) at all heights with H.B wire netting at every third layer, including scaffolding, maintaining proper line, level & plumb, necessary curing, etc. all complete as per the directions of the Bank's Engineer in charge.

Waterproofing treatment to sunken slabs / wall dado in bathroom/WC/Washbasin area/Kitchen without PMM: Preparing the surfaces, by thorough cleaning, using wire brushes / brooms, clean jet of water etc, to remove the loose matter / dust / dirt, to make them suitable to receive the water proofing treatment to be applied over them. Providing and applying two coats (second coat applied over the first coat after necessary curing) of water-proof coating, using polymer-based chemicals Sika TopSeal 107 or approved equivalent, over the surfaces prepared as above. The rate also includes making good, the minor repairs/damages to the walls/floors if any.

Waterproofing treatment to sunken slabs in bathroom/WC with PMM in sunken portion: Providing, laying / rendering, consolidating using hand rammers / trowels, polymer modified, water-proof cement plaster in C.M 1:3, prepared using approved quality, zone III, sieved and washed river sand and approved make portland cement, modified with the same polymer as mentioned above and used as per manufacturer's specifications, for an average thickness of 15 mm, over the water proof-chemical coating applied on the floor and walls, as above, including providing and rendering the same polymer modified cement mortar, prepared as above, to fill the cavities and level the surfaces, to receive the layer of water proof-plaster. The surface of the polymer modified, water-proof plaster layer shall be finished smooth using, using floats, trowels and brushes. Providing and applying two coats (second coat applied over the first coat after necessary curing) of water-proof coating, using polymer-based chemicals Sika TopSeal 107 or approved equivalent, over the surfaces prepared as above. The surfaces shall be suitably prepared as per the instructions / specifications of the chemical manufacturer, before application of each coat of chemicals. The chemicals / materials shall be applied / used strictly as per the manufacturer's specifications and instructions of Bank's Engineer. The rate shall include providing and making 50 mm x 50 mm fillets (coving) at junctions of floor and walls, and walls for the depth of the sunken / raised floor, using P.C.C 1:1.5:3 and C.M 1:3 modified with polymer-based chemicals as used above.The treated portions shall be tested by pounding water for a period of 72 hours to check for leakages / seepages and got approved by the Bank’s Engineer. Any seepage / leakage noticed during the period of testing shall be rectified before going ahead with subsequent works. Note: The rates shall inclusive of submission of performance guarantee for 10 years in prescribed proforma on non-judicial Stamp paper of required value.

Brick bat coba in sunken portion: Providing, laying and filling horizontal faces of sunken slabs (i.e. sunken slab portions of WC, kitchen, etc.) with waterproof brick bat coba in CM 1:4 admixed with approved waterproofing compound as per manufacturer's specifications up to 200mm depth including proper consolidation to level and slope, finishing top layer in CM 1:4 admixed with approved water proofing compound, curing etc. complete all as directed. (Bottom & top cement mortar thickness should be minimum 20mm). The rates shall inclusive of submission of performance guarantee for 10 years in prescribed proforma on non-judicial Stamp paper of required value.

Providing and laying screed concrete (1:2:4): Providing and laying in position plain cement concrete (1:2:4), having thickness up to 75mm, laid with proper slope. Work includes curing.

Providing and fixing anti-skid vitrified floor tiles: Providing and laying 1st quality anti-skid, minimum average 10 mm thick floor tiles of approved make, quality, shade of approximate size 600x600 mm or any other approved size in floor tiling in toilet/bath area in proper position and slope laid on average (or as per site requirement) 20mm. thick bed of Cement Mortar 1:4 (1 Cement : 4 Sand) including cement float, filling joint in white cement paste mixed with matching colour pigment, cleaning, curing, etc. complete all as directed by the Bank’s Engineer. The basic cost of tiles shall be ₹730.00 per Sq.m. exclusive of all taxes.

Providing and fixing 20mm diameter SDR-11 grade Chlorinated Polyvinyl Chloride (CPVC) pipes: Providing and fixing 20mm diameter Chlorinated Polyvinyl Chloride (CPVC) pipes, having thermal stability for hot & cold water supply, including all CPVC plain & brass threaded fittings, i/c fixing the pipe with clamps at 1.00 m spacing. This includes jointing of pipes & fittings with one step CPVC solvent cement and the cost of cutting chases and making good the same including testing of joints complete as per direction of Engineer in Charge.