Designing, Providing and fixing multiwall three or more layered polycarbonate sheet panel co-extruded Ultra Violet (UV) protective coating on external surface with standing seam on both the running ends, sheet shall be connected using polycarbonate connectors having grip lock double tooth locking mechanism and provided with endcap at the ends to ensure water and air tightness. The light transmission form transparent or translucent or opaque or in combination polycarbonate sheet, varies from 15 to 85% shall be decided by engineer in charge as per requirement. The polycarbonate sheet shall have Dart drop impact value more than 60 Joules as per IS14434 2023 and confirm either flame retardancy of class UI-94HB/94V-0 category as per IS14434-2023 or category V0 & HB as per ASTM D635-18 or BS1D0 classification as per EN13501 for fire safety The yellowness index tested as per ASTM E313 (D1925) or ASTME313 (1925) shall be equal to or more than 10 unit or 6 unit respectively on a sample after 5000 Hours of exposure of UV/ sun light. The cross section ends of poly carbonate sheet shall be provided with self-adhesive aluminum impermeable tape at top and aluminum ventilated tape at bottom of the sheet and covered with polycarbonate / aluminum u-shaped protective profile. The poly carbonate sheet shall be held in position by using stainless steel (SS304 grade) trapezoidal cleat of 1 mm thick having minimum bottom width 35mm and top width 50mm or more stainless steel screws of 5mm diameter with 25mm long with structural steel framework. The cleat shall be tested to withstand pull out force equal to wind speed of 5m/s as per IS 875 and design test report shall be submitted to Engineer-in-charge for approval before use. The cost of ridge and gutters of pre-coated galvanized iron sheet of approved specifications and structural steel framework of shall be paid in respective item for separately.
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12mm thick 1000 (+_10% wide panel with U value not more than 2.50 W/m2K and weight not less than 2.25 kg/sqm.
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Painting with synthetic enamel paint of approved brand and manufactureof required colour to give an even shade :
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One or more coats on old work
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Dismantling roofing including ridges, hips, valleys and gutters etc., and stacking the material within 50 metres lead of:
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