En Certificated Zhtdoors Wholesale China Factory Good Quality Aobiao Fire Rated Elevator Doors Frame

Fireproof door is a door that can meet the requirements of insulating refractory stability and keeping integrity in a certain period of time. It is located in the fire zone for separating fire, evacuation stair, and a range of fire resistance of fireproof dividers. Fireproof doors, except the same function with the ordinary door, it even has the function to stop the spread of fire and smoke, and it can prevent the spread of the fire to ensure the evacuation in a certain period of time.

Fireproof doors are divided into:
1. According to the material: steel heat insulation fireproof doors; wood heat insulation fireproof doors; steel wood heat insulation fireproof doors; other material heat insulation fireproof doors.
2. According to the fire resistance and heat insulation performance: Class A fireproof door (no less than 1.5 hours), Class B fireproof door (no less than 1 hours), Class C fireproof door (no less than 0.5 hours).
3. According to the characteristics of opening and closing: normally closed fire proof doors, normally opening fireproof door.