- 20
- Sep
അപ്പാർട്ട്മെന്റ് തീ റേറ്റുചെയ്ത വാതിൽ
Apartment fire doors are generally set up in stairwells, with Class B fire doors as the mainstay. No matter what kind of profile fire door, the fire resistance rating of Class B fire door shall not be less than 1 hour.