External repair and painting of few blocks constructed in different phases at Anushakti Abasan 1AF, Bidhannagar, Kolkata 64

Amount

Dismantling & Demolishing damaged cement plaster (approx thickness 20mm)/ plain cement concrete, Mosaic tile, flooring / dado/ including, stacking of serviceable materials, by chiselling at all level and location including scaffolding, disposal of unserviceable materials outside Anushakti Abasan etc all complete as per specification and as directed.

(a) In plain cement concrete 1:3:6 / 1:2:4

Providing, cement plaster 1:4 (1 Cement : 4 coarse sand) at all height, level, location for external/ internal surfaces on masonry wall/ concrete surface over a bond coat made with latex of M/s. FOSROC/ SIKA or other approved equivalent Indian make with water in the ratio 1:4 (1 Latex : 4 water) in cement slurry or as per manufacturer’s recommendation, providing necessary scaffolding, finishing the surface to plumb level etc. to match with the existing surface, making drip mould, vatas, corners etc. curing including dismantling, square cutting of old damaged plaster etc at any level, location .all complete as directed by the Engineer-in-Charge.

(a) Of 15 mm average thick, single coat.

External cement plaster as specified below in cement mortar 1:4 at all heights and locations including scaffolding, preparing the surfaces, finishing to correct line, level and plumb, curing including making plaster fluting (plaster in steps) etc. where ever required complete as per specifications, drawings and as directed by Engineer-in-Charge.

a) 20 mm. thick in two coats for brick/concrete surfaces (external / internal) (back coat and finishing coat of 10 mm. thick each) with water proofing agent @ 2% by weight of cement. Note: Before application of each coat cement slurry shall be provided as per requirement.

Repair of damaged/corroded RCC members etc. by carefully dismantling, chiseling all loose spalled and cracked concrete and plaster till exposing a hard firm surface at any height, level, location, cleaning reinforcement steel thoroughly adding new reinforcement by Welding or as directed, if found necessary de-rusting with sand/ emery papering including chemical cleaning with ‘Rustolin’ or equivalent Indian make, washing with water jet, applying anticorrosive polymer modified protective coating “Sika Rustop” of M/s. Sika Qualcrete or approved equivalent Indian make as per manufacturer recommendation, by bard brush, on exposed clean and dry reinforcement steel, allowing 24 hours time gap for drying and curing, applying a bond coat for old and new concrete bonding using latex of M/s Qualcrete or approved equivalent Indian make in cement slurry in the ratio 1:3 (1 latex : 3 water ) or as directed by the Department uniformly on concrete surface including on steel, laying concrete 1:1 ½:3 (1 cement :1 ½ coarse Sand: 3 stone chips 6mm size ) with heavy dash and uniformly to build concrete thickness in between 35 to 60mm made with plasticizer cum waterproofing admixture like Sika Plastocrete Super or approved equivalent Indian make @ 0.2% by weight of cement on columns, beams, chajjas, slabs, facia etc. including leveling up with cement plaster (1:4) over a coat of cement slurry mixed with Latex in water in the ratio 1:6 (1 latex : 6 water ) or approved equivalent up to a thickness of 15mm finished to level, plumb making drip moulds, vatas, corners etc. to match with the existing at any level, location including scaffolding (as per site requirement), providing all manpower, tools, materials etc. on internal & external surfaces of all buildings at Anushakti Abasan etc. followed by proper curing, etc. As per manufacturer’s recommendation and direction of EIC etc. complete.

Providing and laying plain cement concrete (1:2:4) at all level, location, using well graded stone aggregate of size 6mm to 20mm maximum including machine mixing, conveying, placing, consolidation, finishing, dewatering if necessary, curing, necessary scaffolding, form work, including dismantling and disposing of old damaged concrete etc. all complete as per drawing, specification and as directed by the EIC.

Providing wall care putty (thickness not less than 1.5mm) suitable for both internal and external application of approved manufacture, grade applying evenly on wall surfaces & finishing, smooth, hard surfaces, curing, scaffolding at all level & location etc. complete as per specification and as directed by the Engineer-in-Charge.

Providing labour tools tackles for application of white cement based wall putty slurry in the ratio 1:1.1 (1 Putty: 1.1 water)of M/s. Birla white or other approved equivalent Indian make and brand(consumption 2.25 kg putty / 10 Sqm approx) over newly /old plastered wall surface, for making the wall surfaces smooth in order to match with existing surface, finish including necessary cleaning etc. providing scaffolding (if required) at all level, location etc. all complete as directed by the EIC.

Providing and fixing double scaffolding system on the exterior side, up to seven (07) story height made with 100 mm dia bamboo 1.5 m centre to centre, horizontal & vertical bamboo joining with coir rope including working platform etc. and maintaining it in a serviceable condition for the required duration as approved and removing it there after. The scaffolding system shall be stiffened with 75mm dia bamboo bracings, runners, connection with the building etc. wherever required for inspection of work at required locations with essential safety features for the workmen etc. complete as per directions and approval of Engineer-in-charge. The elevational area of the scaffolding shall be measured for payment purpose. The payment will be made once irrespective of duration of scaffolding.

Providing materials, labours, tools, tackles for shuttering and centering works for foundations, pedestal, chajjas, roof, beam, columns etc. in proper line and level matching with the supplied drawing with necessary supports including de-shuttering etc, complete as per drawing and as directed by the EIC.

Supplying reinforcement for RCC works including transporting, decoiling, straightening, cutting in required length, bending, placing in position at all level, location with steel conforming to IS 1786-1985 or mild steel conforming to IS 432-1982 and lapping by welding with existing reinforcement / MS member or binding with 20 gauge soft drawn annealed and as directed (cost of steel binding wire, welding machine and welding rod shall be borne by the contractor and shall not be measured separately for payment etc.) complete as per drawing and as directed Engineer-in-Charge.

Painting external surfaces with two or more coats of high-performance exterior painting system with the toughest lamination, powered by Graphene Ultima Protek Suprema as Topcoat under brand Asian paints or other approved equivalent make of approved colour and shade over a coat of Ultima Protek Suprema Basecoat under brand Asian paints or other approved equivalent make and all as per manufacturer's recommendations and as per the approved sample at all height, level and location including providing necessary scaffolding, Scrubbing of surface and washing with high-pressure jet washer to remove all dirt, grease, loosely adhered paint, algal growth , filling up cracks & crevices with approved putty, curing the surface etc. complete as per specifications and as directed by Engineer-in-Charge. complete as per specifications, drawings, manufacturer’s recommendations including insurance coverage of all workmen etc. as directed by the EIC and paint manufacturer’s recommendation. NOTE: Contractor has to obtain a performance guarantee certificate for a period of at least eight years from the paint manufacturer against growth of fungus, algae, and peeling of the paint film and submit it to the Department from the date of completion of the job.

a) External paint

Painting two coats of Synthetic Enamel Paint of 1st quality & approved make, shade/colour on old painted/new surfaces, of wooden surface, steel windows, steel cupboards, pipes etc. over a coat of approve wood / metal primer, including thorough surface preparation filling up of dents, cracks etc. all complete at any height and level including scaffolding etc. all complete as per specification and as directed. by the Engineer in charge.

Providing, material, labour, tools, tackles etc. for erection & fabrication with structural steel cleaning, scrapping mechanically/manually to remove dust, rust if any, cutting materials to size, removing damaged members at all level & location, re-fabricating and providing newly fabricated structure as required, fixing in position, welding, threaded holes, making threads, carrying out all joints in best workmanship, providing nuts, bolts, washers (up to 20mm), grinding, other fastenings & consumables etc. complete as per specification, drawing and as directed. For following sub sub-items below :

(a) Using MS angle, tee, flats, bars, plates, MS tubes, cleats RHS, SHS etc. conforming to IS- 800: 1984 and IS- 2062: 2006 of M/s. TATA or other approved equivalent Indian make.

Providing and fixing Galvalume toughened permanently colour coated GALVALUME roofing /walling/flashing sheet 0.5mm thick of M/s. TATA BLUE SCOPE / EVEREST or approved equivalent manufacturers with special polyester colour coating thickness 20 microns (DFT) on exposed surface and 5 microns(DFT) on unexposed surface over 5 microns (DFT) of polyester primer on both surfaces in CRCA Sheet of 550 Mpa yield with hot dip coating of 150 gms/m2 Aluminium Zinc alloy conforming to ASTM A 792 M-02/AS 1397 all as per manufacture’s specifications of approved shade and colour fixing to tubular truss at all levels including placing & fixing in position, bending to shape, cost of all materials, labour, tools and plants required for completion of the work, all overlaps mitering wherever necessary including providing metallic self drilling self tapping fasteners of M/s BUILDEX embossed as “BX” conforming to AS3566 class III having neoprene /EPDM washer, sealing joints with neutral cure type sealants in order to make the roof leak proof all as per manufacturer's code of practice etc. complete as per drawing and as directed by the EIC

Providing and laying in wall surfaces at any height, level, location, matt finished, 1st quality vitrified / terracotta tiles conforming to IS 13712 and tested as per IS 16360 of approved shade and colour of maximum 600mm X 600 mm size as directed by the department, standard quality tiles of M/s. JOHNSON / Kajaria /Barmora or other approved equivalent Indian make, over 20mm thick cement mortar (1:3) bedding. Close jointed and pointed with matching cement slurry, with white cement and / or pigment mix, finish to proper level and slope, plumb, including cutting of tiles, mitreing, curing, washing the surfaces neatly etc. all complete, including dismantling old damaged cast in situ mosaic wall surfaces / old tiled surfaces etc. or fixing on cast in situ existing mosaic / surfaces by tile adhesive conforming to IS15477 : 2004 (type 1 / type 2) under brand “TILOFIX” of M/s. SIKA or other approved equivalent Indian make after hacking the surfaces properly etc. as per specifications and as directed by the Engineer-in-Charge.

Supplying , providing and laying non shrink free flow cementicious micro concrete at all level & location under brand “ Renderoc RG” of M/s. Fosroc or approved equivalent Indian make as per manufactures recommendation, cleaning unsound concrete, loose material, cleaning with water , providing bond coat with SBR latex in the ratio of 1:4:6 , making necessary water tight film faced form work made upto film faced ply and batten frame work, de shuttering finishing, curing etc. all complete as directed by the EIC.

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