Insulated fire doors (Class A) refer to fire doors that can meet both the requirements of fire resistance integrity and insulation within a specified time. Fire doors are classified according to their fire resistance duration into Class A1.50, Class B (A1.0), and Class C (A0.5).

Fire doors are typically used in (but not limited to) the equipment rooms of automatic fire extinguishing systems, ventilation and air conditioning machine rooms, boiler rooms, transformer rooms, diesel generator rooms within high-rise buildings;

The use of Class B fire doors (not limited to): Fire escape routes, commonly used at the entrances and exits of stairwells; doors and windows that connect rooms with atrium corridors, the lobby in front of smoke-proof stairwells and between them, as well as passages that lead to the atrium.

The use location of Class C fire doors (not limited to): generally used for inspection doors on equipment manholes, ventilation ducts, garbage chute walls, doors in front of garbage chutes 3, and cable wells and duct wells;

Fireproof rolling shutter doors are used in locations where the fire resistance time is 3.0 hours. When it is difficult to set up firewalls or fire doors in buildings, fireproof rolling shutter doors should be used instead to divide fire compartments and control the doors on firewalls and fire partitions set up to limit the construction area of each compartment. They are mainly used in public places with fire protection requirements, such as large supermarkets (hypermarkets), large shopping malls, large specialized material markets, large exhibition halls, factories, warehouses, etc.

There are no specific regulations regarding the material of fire doors. The choice of material does not affect the fire acceptance, which is determined based on site requirements.