Use of fire doors

1 Flammable and explosive enclosed or semi-enclosed rooms must be equipped with fire doors. 2. Partition doors in large buildings to prevent the spread of fire. Fire doors must first be non-flammable or flame-retardant, and secondly, they must be able to seal shut: handshake

The grade of fire doors is related to the grade of the building structure; for example, factories with a Class C risk level generally can use Class B fire doors. However, there are some areas where Class A fire doors are required; the specific requirements can be found in the regulations.

Fire doors are generally used to create partitions between fire compartments

1. A smoke-proof vestibule should be provided at the entrance to the stairwell, or balconies or loggias dedicated to smoke exhaust should be available; furthermore, the doors leading to the vestibule and the stairwell must be of Class B fire resistance. II. Offices and rest rooms located within Class C factories shall be separated from the factory by non-combustible partition walls with a fire resistance rating of not less than 2.50 hours and floors with a fire resistance rating of 1.00 hour, and there shall be at least 1 independent safety exit. If doors that connect to each other need to be installed in partition walls, Class B fire doors should be used. III. The intermediate storage tank for Class C liquids in the factory building shall be located in a separate room, and its volume shall not exceed 1 m3. The rooms in which this intermediate storage tank is located shall have enclosure components with a fire resistance rating that is not lower than the requirements for buildings of fire resistance class II; the doors in these rooms shall be of class A fire-resistant type. IV. Offices and rest rooms located in Class C and D warehouses shall be separated from the warehouses by non-combustible partition walls with a fire resistance rating of not less than 2.50 hours and floors with a fire resistance rating of 1.00 hour, and independent safety exits shall be provided. If doors that connect to each other need to be installed in partition walls, Class B fire doors should be used. V. For two factories with fire resistance ratings of grade I or II, if the adjacent lower exterior wall serves as a fire wall and the roof fire resistance rating of the lower factory is not less than 1.00 hour, or if Class A fire-resistant doors and windows or fire-resistant partition water curtains are installed at the openings such as doors and windows on the adjacent higher exterior wall. VI. In underground, semi-underground factories or the basements and semi-basements of such factories, when multiple fire compartments are arranged adjacent to each other and separated by fire walls, each fire compartment may use a Class A fire door on the fire wall that leads to the adjacent fire compartment as a second exit; however, each fire compartment must have at least one exit that leads directly outside. VII. Each warehouse shall have no fewer than 2 safety exits; when the floor area of a warehouse is 300 m2 or less, 1 safety exit may be provided. Each fire compartment within the warehouse should have no fewer than 2 exits leading to evacuation corridors, stairs, or the outdoors; when the floor area of a fire compartment is 100 m2 or less, 1 exit may be provided. Doors leading to evacuation corridors or stairways shall be Class B fire doors. 8. In underground, semi-underground warehouses, or the basements and semi-basements of warehouses, where multiple fire compartments are arranged adjacent to each other and separated by fire walls, each fire compartment may use a Class A fire door on the fire wall that leads to the adjacent fire compartment as a second exit; however, each fire compartment must have at least one exit that leads directly outside. 9. Except for multi-story Class E warehouses with fire resistance ratings of Grade I or II, the lifting equipment used for vertical transportation of goods in other warehouses should be installed outside the warehouse. When it is necessary to install it inside the warehouse, it should be placed in shafts whose fire resistance limit is not less than 2.00 hours. The doors leading to the warehouse entrance from the indoor and outdoor lifting facilities should be Class B fire doors or fire shutters. X. When an oil storage room is installed in the boiler room, its total storage capacity shall not exceed 1 m3, and the oil storage room shall be separated from the boilers by a fire wall ； When it is necessary to create an opening in the firewall, a Class A fire door should be installed. There are too many; since the scope you mentioned is quite broad, it’s not possible to give a specific response. Please try to ask more targeted questions in the future.