Fire doors are one of the important measures for fire separation in buildings. In addition to the function of ordinary doors, fire doors also require the ability to isolate smoke and fire, prevent the spread of fire and smoke, and ensure the safety of personnel evacuation. Therefore, strict requirements must be placed on it.

Fire doors are usually divided into wooden fire doors, steel fire doors, steel wood fire doors, and other material fire doors. According to the national "New Standard for Fire Doors" GB12955-2008, fire doors are divided into three levels: A, B, and C. According to the classification of levels, the fire resistance insulation and fire integrity standards are: at a high temperature of about 900 ℃, the fire resistance limit of Class A fire doors is not less than 1.5 hours, Class B is not less than 1.0 hour, and Class C is not less than 0.5 hour. Grade A doors are generally used in important places, such as distribution rooms, transformer rooms, boiler rooms, etc. in high-rise buildings. Class B doors are also the most commonly used fire doors, commonly used in evacuation routes and stairwells. Class C gates are generally used in locations such as pipeline wells. The specific applications are as follows:

Class A fireproof door

1. The highest level of fire separation (firewall, fire compartment, atrium, etc.)

2. Doors in densely populated areas (cinemas, auditoriums, etc.)

3. Important warehouse doors (confidential room, archive room, etc.)

4. Doors for fire related equipment (transformer room, distribution room, etc.)

5. Doors for non fire related important equipment (such as air conditioning rooms, refrigeration rooms, etc.)

Class B fire door

1. Open doors at safety exits (enclosed stairwells, smoke proof stairwells, front rooms, etc.)

2. Halls and room doors of entertainment buildings (KTV, amusement halls, etc.)

3. Rooms or places with high fire hazards (kitchens in public buildings, attached warehouses in civil buildings, etc.)

4. Rooms (places) used by vulnerable groups (operating rooms, delivery rooms, etc.)

5. Functional control scale zoning (between nursing units in hospitals, etc.)

6. Equipment room (fire control room, etc.)

7. When the distance between doors and windows on both sides of the fireproof partition wall is insufficient, alternative measures should be taken

8. For residential buildings larger than 54m but less than 100m, each household shall have a room door with a shelter function and an external window.

Class C fireproof door

1. Vertical shaft protection (such as pipe well doors)

2. Internally connected doors and doors of equipment rooms that open to the outside (such as transformer and distribution rooms)

Fire door opening and closing method

Fire doors are divided into two types based on their opening status: normally open and normally closed, and both types must be opened in the direction of evacuation.

Normally open fire doors are equipped with release devices or automatic linkage door closers, which are generally installed in places with large crowds and high flow of people, such as schools, large shopping malls, hospitals, etc. They should be in an open state under normal circumstances, making it convenient for people to enter and exit. However, in the event of a fire, the release device or linkage door closer will receive an alarm signal and automatically close, blocking the fire and thick smoke.

Weiman Door Industry reminds you to use and protect fire doors correctly. Normally closed fire doors should be closed in a timely manner. Do not dismantle door closers or lock fire doors without authorization, leaving us with more opportunities for safety and hope for life! When purchasing a security door, be sure to choose a legitimate channel!

Essential signs for regular fire doors

About Weiman Door Industry

Nanjing Weiman Door Industry Co., Ltd. is a professional high-end building door system service provider. The company's products include fireproof doors, anti-theft doors, interior doors, special doors, fireproof rolling shutters and other series, fully meeting the needs of various building doors in commercial, civil and industrial markets. In 2016, Weiman became a strategic partner of ASSA ABLOY, committed to providing the world's leading integrated door opening solutions for the Chinese market, offering high-quality products and timely and efficient professional services to our customers.