Modern Double-layer Metal Steel Fire Door 3-hour Fire Rating Heat-insulated Safe Exit Commercial RAL

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Double Leaf 45 mm Thick FD60 Steel Fire Door For Access Corridor/ 1.0 mm Steel SheetFD60 Steel Fire Doors Product Description Fire doors are one of the fireproof separation facilities of buildings. They are usually used on firewalls, stairwell entrances or pipe openings, and play an important role in reducing fire damage. In the high-rise civil building design fire protection standard, the fire doors are classified into Grade A, B and C, and the fire resistance rating is