providing & fixing galvalume colour coated roofing in sugar godown no. 4 complete in all respects , providing & fixing galvalume colour coated roofing in sugar godown no . 4 complete in all respects , providing & fixing trapezoidal sheeting in galvalume colour coating sheet having covered width of 1000mm ( total width 1060mm ) , 35mm crest at a pitch of 200mm stiffened with 8mm deep intermittent corrugation sheet made from base metal having 0 . 50mm thickness on steel of grade 345 as per astm a 792 m coated with alloy of al & zn to grade az minimum alloy mass 150 gm total both side with colour coating having complete dip tank pre-treatment process with chromat conversion ( cr+3 ) as main pre-treatment followed by pu primer of min . 5 micron dft on each surface , finished with special polyster paint to grade 20 of min . 20 micron dft on exposed surface & 5 micron in grey shade on unexposed surface . , providing & fixing of ridge / gutter of same material as mentioned in item no . 2 having total width of 1060mm crimped curve type / pressed with same profile .