- 13
- Aug
90 Minute Fire Door Labels For Sale
Fire doors can be classified into Class A, Class B and Class C according to their grades, which are distinguished according to the thermal insulation. The fire resistance grades of fire doors are 0.5h (Class C), 1.0h (Class B), 1.5h (Class A) and 2.0h and 3.0h. Welcome to consult us.