The steel fireproof door has the advantages of fire protection, heat preservation, safety and collision resistance. The fire resistance time of Grade A steel fire door shall be no less than 1.5 hours, that of Grade B steel fire door shall be no less than 1 hour, and that of Grade C steel fire door shall be no less than half an hour.

steel or fiberglass door,steel entry door,exit door,emergency door,fireproof door fremont,fire rated door,

шишаи шикастани дари ҳолати фавқулодда,steel or fiberglass door,насби дари оташ,fire rated door,steel fire door,metal hollow door,fireproof door fremont,fireproof door fremont,

fire rated door,exit door sign,fire rated door smoke seal,fire resistant door,steel or fiberglass door,metal screen door,fireproof door fremont