supply of profile sheets and ridge , supply of bare zincalume trapezoidal profile roof sheet of 0.45 mm base metalthickness ( 0.51 tct ) pf 935 mm 980 mm effective cover width, with minimum 8 major corrugation, of 24 mm 30 mm high rib speed at 93.5 mm or more c / c. the end rib shall have anti- capillary groove and return leg. the feed material shall be 0.45 mm bmt. ( 0.51 mm tct zincalume ) steel- high tensile with min 550 mpa tield strength, metallic hot dipped coated with alza 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. ( qty. 2294 sq. mtr. ) , same as item no. 1 but in ridge cap plain size 2500 mm length x 600 mm width ( qty 90 running mtr. )