According to the different fire resistance of steel fire door, its fire resistance can be divided into A, B, C three grades, different grades of steel fire door can be applied to various places.

pvc fire rated door,fire and acoustic door,fire proof door accordion,fire rated door skin,lowes fire rated doors,pvc fire rated door,fire rated exit door,fire and acoustic door,double swing fire doors,fire rated door skin,interior fire rated steel door,pvc fire rated door,exit entry fire rated door,fire and emergency escape door,fire rated door skin,double leaf fire rated door,fire and acoustic door,fire rated steel doors manufacturer