What is the thickness of the fire-rated duct? A fire-rated duct ought to be made with a single pores and skin, possessing a overall thickness not exceeding 2mm. This measurement incorporates the intumescent coating, that is important for maximizing fire resistance. Fire-rated ductwork is vital for maximizing the fire safety https://connervmdqf.theisblog.com/39895989/the-basic-principles-of-fire-rated-insulation-for-ductwork