Name of Work:- Urgent duct replacement work of 3 nos ITU, 2nd floor, Green building at MCH, Kolkata.
Sl. No.
Item Description
1
Dismantling and flattenig the existing sheet metal insulated ducting(approx 3 x 90 sq. mtr) complete with elbows, supports etc. by co's own tools & tackles by maintaing normalcy as far as applicable and keep them at store as per direction of EIC.
2
Dismantling all types of masonry excepting cement concrete plain or reinforced, stacking serviceable materials at site and removing rubbish as directed within a lead of 75 m.[B/W-P10, 1(b)]
3
Ordinary Cement concrete (mix 1:2:4) with graded stone chips (20 mm nominal size) excluding shuttering and reinforcement,if any, in ground floor as per relevant IS codes for both sice mending after duct & aluminium grill installation and as per direction of EIC [B/W-P24, 4(a)]a) Pakur Variety
4
Rendering the Surface of walls and ceiling with White Cement base WATER PROOF wall putty of approved make & brand.(1.5 mm thick) [B/W-P198, 5(i)]a) 1st floor level
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b) 2nd floor level
6
Applying Exterior grade Acrylic primer of approved quality and brand on plastered or cencrete surface old or new surface to receive decorative textured (matt finish) or smooth finish acrylic exterior emulsion paint including scraping and preparing the surface throughly, complete as per manufacturer's specification and as per direction of the EIC [B/W-P196, 8(b)]a) Two Coats at 1st floor level
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b) Two Coats at 2nd floor level
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Supply, fabrication, testing and balancing of GSS sheet metal rectangular ducting complete with elbows, supports etc. of following sheet thickness. Make- Sail / Tataa) 24SWG
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b) 22SWG
10
Supply and fixing of acoustic lining of supply air duct with 10 mm thick class \\"O\\" open cell nitrile rubber insulation. (Make - A-flex/ Armacell/ K-Flex)
11
Supplying and fixing of thermal insulation on exposed ducts with 75mm thick TF quality expanded polysterene slab(16Kg/Cum) and sand cement plaster (Make: Beardsell/ Astha)
12
Supply and installation of fire retardant canvas cloth.
13
Supply, fixing, testing and commissioning of fire dampers in supply air duct/main branch and return air path as and where required of required sizes i/c control wiring, the damper shall be motorized and spring return so as to close the damper in the event of power failure automatically and open the same in case of power being restored. The spring return action shall be inbuilt mechanism and not externally mounted. The damper shall also be closed in the event of fire signal complete as required and as per specifications. (Make: Systemaire / AIR Master / Dynacraft / Air enterprise)a) Fire Damper
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b) Actuator with controlling unit and detector
15
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