tender for special repair of bldg no b-30 at barrackpore cantt under ge barrackpore-- 1 dismantling of asbestos cement sheet (corrugated or semi corrugated etc) as in roof covering complete all as specified and as directed. 2 m&l pre- painted hot dip aluminium zinc alloy metalic coated trapezoidal profile steel sheet 0.50mm thick ( total coated thickness), any pattern corresponding to is 15965 : 2012 of durability class 3, atmospheric classification category 3, coating class az 150 of an approved colour having yield strength of 550 mpa as in roof covering/wall cladding, fixed with self tapping screws complete all as specified and as directed. 3 m&l pre- painted hot dip aluminium zinc alloy metalic coated plain steel sheet 0.50mm thick ( total coated thickness), any pattern corresponding to is 15965 : 2012 of durability class 3, atmospheric classification category 3, coating class az 150 of an approved colour having yield strength of 550 mpa as in roof covering/wall cladding, fixed with self tapping screws as specified complete all as specified and as directed. note: to be executed for provision of ridges and hips. 4 dismantling wrought iron or mild steel work of any description not otherwise provided for complete all as specified and as directed. 5 m&l rolled sections as in main and cross beams, hip and jack rafters; purlins where connected to common rafters and running rails and guides for sliding doors; fixed with angle cleats or other connecting plates fe 410 -w (gdee- 250) quality a complete all as specified and as directed.