- 08
- Aug
90 Minutes Fire Rated Fire Exit Door
The fire resistance time of Grade A steel fire doors is not less than 90 minutes. The interior of Class A fire doors is generally made of perlite, and a small amount of refractory materials such as vermiculite fireproof panels, foam door core panels, MC flexible materials, etc. The steel fire door is a door with a certain fire resistance composed of fireproof hardware accessories, and its fire resistance is very good.