Supply, installation of site/factory fabricated GI sheet metal ducting with double neoprene gaskets complete with GI supports, MS flanges duly painted, fully threaded GI rods, GI nuts and bolts as per specs & dwgs and SMACNA standards. The zinc coating thickness should not be less than 120 grams/sq,mtr (GSM) (RECTANGULAR DUCT) 1. 24 gauge sheet ducting, 2. 22 gauge sheet ducting, 3. 20 gauge sheet ducting, Insulation of Ducting ,with cross linked polyphenoic backed by aluminium foil on on side class 'O' Class and other side with adhesive at site SR990 .joints are overlapped with aluminium tape.
