What are the material requirements of class A fire resistant door ?
Refractory time should be no less than 1.5 hours.
It must meet standards of the national regulation. You may search on Baidu.
Grade A fire resistance steel door, namely steel wooden doors or steel-wooden composite door, including reinforced wooden door, is usually used in indoor. In fact, it is the door with steel bar inside and density board or blockboard outside.
What are the material requirements of class A fire resistant door ?
