A fire door is a door that can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. It is a fire-resistant partition with certain fire resistance located in fire compartments, evacuation stairwells, vertical shafts, etc.
In addition to the function of ordinary doors, fire doors also have the function of preventing the spread of fire and smoke. It can prevent the spread of fire within a certain period of time and ensure the evacuation of people.
According to heat insulation requirements and fire resistance grade, fire doors are divided into three categories: A, B, and C.
Class A fire door
Class A fire doors, also known as fully insulated fire doors, can meet the requirements of fire resistance and heat insulation and fire integrity at the same time within the specified time. h (Grade A) and 2.0h, 3.0h.
Class B fire doors
Class B fire doors are also called partial heat insulation fire doors. The fire resistance and heat insulation requirements are 0.5h, and the fire resistance integrity levels are 1.0h, 1.5h, 2.0h, and 3.0h.
Class C fire doors
Class C fire doors are also known as non-insulated fire doors, which have no requirements for fire resistance and heat insulation. They only meet the requirements of fire integrity within the specified fire resistance time, and the fire integrity levels are 1.0h, 1.5h, and 2.0h respectively. , 3.0h. In the British BS standard, there are non-insulated fire doors.