CPWD DSR item 12.68.1 rate analysis

Providing and fixing multi walled transparent/opaque 10 mm thick polycarbonate sheet of required colour blue, brown or green etc. UV co-extruded and having UV coating on one side multi walled sheet of weight not less than 1.60 to 2.05kg/sqm as approved by Engineer-in-charge. The light transmission from transparent or translucent or opaque polycarbonate sheet varies from 30 to 80% and shall be decided by engineer in charge as per requirement. The panel shall satisfy the Dart drop impact test for value above 15 and upto 60 Joules and confirm either flame retardancy of class UL-94HB/94V-0 category as per IS 4434:2023 or category V0 & IIB as per ASTM D635-18 or BSID0 classification as per EN13501 for fire safety. The yellowness index tested as per ASTM E313 (D1925) shall be less than or equal to 2 or it shall be 1 units as per ASTM D 2244 at the time of installation and shall be less than or equal to 10 as per ASTM E313 (D1925) or 6 units as per ASTM D 2244 on a sample after 5000 Hours of exposure of UV / sun light. The multi walled polycarbonate sheet shall be fixed on tubular steel structure with aluminium Alcox section of size 60x18x2 mm (anodized 25 micron thick) and weight not less than 0.462 kg/metre. Weather proof Neoprene/EPDM rubber gasket shall be fixed on both side of joints to make the whole structure water tight as per approved design/drawings. The aluminium section shall be fixed on Joints at both sides (top & bottom) of polycarbonate sheet to hold the sheets rigidly together. The weather proof neoprene gasket and aluminium profile shall be fixed and sealed with silicon sealant to make the Joints fully water proof. The open overhead ends of polycarbonate sheet to be sealed with anodised aluminium U Profile/channel of size 10x10x1.5 mm thick of weight not less than 0.2kg/m. The polycarbonate sheet and aluminium profile shall be fixed to MS Framed Structure with self-tapping and self-drilling 55mm long steel screws to be fixed @ 300mm centre to centre. The rate shall be inclusive of cost of all material involved such as polycarbonate sheet, aluminium profile and aluminium channel, EPDM gasket, Self-tapping screws, nut bolts, Silicon sealant or any other material required for fixing the sheet but excluding the cost of steel structure which shall be paid separately including hoisting the sheets and fixing in position. The rate shall also include the cost of all T&P scaffolding and safety precautions required during execution of the work. The entire work shall be executed as per required design/drawings and direction of Engineer-in-charge, all complete. 10 mm thick and U-value not more than 2.50 W/m2K