Our in house, Fire Rated Ductwork meets all requirements of BS 476: Part 24 (1987), and ISO 6944 (1985), These systems such as Firemac FM60 (one-hour fire resistance), Firemac FM120 (two hours fire resistance) and Firemac FM240 (four hours fire resistance) use a fire protection cloth called Firemac FM Fabric, bonded and mechanically fixed onto steel ductwork by the duct worker.
