Commercial fire rated doors with a 60-minute fire rating are designed to provide one hour of protection against fire and smoke, crucial for safety in commercial buildings. These doors typically feature galvanized iron sheet skins and infill materials like honeycomb kraft paper in the shutter and rockwool in the frame for fire resistance. Accessories such as hinges, locks, flush bolts,... https://ahlada.com/products/fire-rated-60-mins-commercial-steel-door/