Fire rated door Fire rating: 20 minutes, 30 minutes, 45 minutes, 60 minutes, 90 minutes Certificate: CE, UL, Steel fire rated door1. Certificate: American standard UL (ANSI/10B, ANSI/10C) European standard EN 1634-1:2008 Chinese standard GB 12955-20082. Fire rating: 20 minutes, 30 minutes, 45 minutes 60 minutes, 90 minutes3. Door leaf: 52mm thick Sheet thickness 1.0mm, Galvanized steel Thermal ...