The fire resistance time of class C steel fire door shall not be less than 0.5 hours. Accessories for Class C fire doors must be fire proof to meet the specified fire resistance limits.

rolling steel door fire rated,exterior fire rated steel doors,fire resistant doors,ecological fire door,white 34 inch fire rated steel insulated door,double leaf fire door,exterior fire rated steel doors,3 hr fire door,ecological fire door,120 minute fire rated doors,white 34 inch fire rated steel insulated door,ul fire rated door,2 hours fire rated door,white 34 inch fire rated steel insulated door,fire rated door frame,exterior fire rated steel doors,size 9×21 or 10×21 fire rated steel doors,ecological fire door