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The appearance of different grades of fire doors is not too obvious and it is not easy to distinguish, but as engineering practitioners, we need to learn to judge. There are three methods commonly used to distinguish fire door grades on site.
1. Check the acceptance data of fire doors
Check the product inspection reports, certificates, production permits, electronic ID cards of fire doors and other fire acceptance materials when the fire doors leave the factory, and the above are indicated Improve the material and fire door rating.
2. Check the nameplate of the fire door
Check the nameplate of the manufacturer on the door frame of the fire door. The name, address and contact information of the manufacturer are indicated on it, as well as the material and fire protection. grade.
Three. Measurement of fire door specifications
In order to further confirm that the grade of the fire door is correct, the method of measuring the fire door specifications can also be used to verify. The thickness of the steel grade A door frame is generally 12cm and the door leaf thickness is 5cm; the steel grade B door frame thickness is generally 11cm, and the door leaf thickness is 4.5cm; the steel grade C door frame thickness is generally 10cm, and the door leaf thickness is 4.2cm; The thickness of the wooden grade A door frame is generally 10cm and the door leaf thickness is 4.5-5.5cm; the wooden grade B door frame thickness is 10cm, and the door leaf thickness is 4-5cm; the wooden grade C door frame thickness is also 10cm, and the door leaf thickness is 4cm.
Where are Class A, B, C, and Class 3 fire doors used?
As one of the measures of building fire separation, fire doors are usually used on firewalls, stairwell entrances and exits or pipe well openings to prevent the spread and spread of smoke and fire.
1. Install Class A fire doors on the firewall and fire protection components that need to be opened
2. Install Class B fire doors on the evacuation stairs and front rooms
A smoke-proof front room should be set up from the partition to the entrance of the refuge walkway. The use area of u200bu200bthe front room should not be less than 6.0 square meters. The door to the front room should be a Class A fire door, and the door to the refuge aisle should be Class B fireproof. Gate. When a fire occurs, the fire door can block the spread of fire and smoke within a certain period of time to ensure personnel escape.
3. The vertical pipe well is equipped with Class C fire doors
Vertical shafts such as cable wells, pipe wells, flue ducts, exhaust ducts, garbage ducts, etc. need to be set up with Class C fire protection Doors to prevent fire and smoke from spreading through shafts or pipe wells.
4. Important equipment rooms need to be equipped with fire doors of corresponding levels
Important equipment rooms need to be equipped with fire doors to protect equipment safety. Commonly used equipment rooms include: power distribution room ( Class A), ventilation and air conditioning machine room (Class A), fire pump room (Class A), elevator machine room (Class A), generator room (Class A), oil storage room (Class A), fire control room (Class B) , Fire-extinguishing equipment room (Class B).
