The fire resistance time of Grade A steel fire door shall not be less than 1.5 hours, and the thickness of Grade A fire door is generally 50 mm. Pearlite is generally used inside, and a small amount of refractory materials such as vermiculite fire-proof board, foam door core board, etc.

fire rated door bd,steel sliding door design,steel or fiberglass door,metal sheet door,κλειδαριά πόρτας έκτακτης ανάγκης,συρόμενη πόρτα από χάλυβα,

metal sheet door,μεταλλική πόρτα πόρτας,emergency door break glass,fire resistant doors for flats,χαλύβδινη συρόμενη πόρτα,20 minute fire rated door,fire rated door bd,

πυροσβεστική πόρτα bd,fireproof door test,fire rated door frame,χαλύβδινη συρόμενη πόρτα,Πρότυπα πυράντοχης πόρτας,metal sheet door