supply of bare zincalume trapezoidal profile roof sheet and aluminum profile industrial sheet for season 2023-24 , supply of bare zincalume trapezoidal profile roof sheet of 0.45mm base metal thickness ( 0.51 tct ) of 935 mm - 980 mm effective cover width, with minimum 8 major corrugation, of 24 mm-30mm high rib spaced at 93.5mm or more c / c. the end rib shall have anti-capillary groove and return leg. the feed material shall be of 0.45mm bmt ( 0.51mm tct zincalume ) steel-high tensile with min 550 mpa yeild strength, metallic hot dipped coated with al-za alloy ( 55% aluminium, 43.5% zinc, 1.5% si ) as per as1397 / is15961-zincalume az 200 ( min.200g / m2 total on both sides ) of steel make having the licence of bethlehem international engineering corporation ( biec ) . ( as per technical specification ) , same as above item 1.01 but supply of ridge caps ( plain ) width / girth of total 600 mm. , supply of aluminum profile industrial sheet made from primary producer alloy 31500b, conforming to is 1254, is 737, is 2676. the sheet shall be made of 0.71mm thick, the profile detail width 1044 cover width 1000mm. , same as above item 1.03 but supply of ridge caps ( plain ) width / girth of total 600 mm.