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The number of fire door leaves can be divided into three cases: single door, double door and four door. According to the Grade A steel fire door, the fire resistance time can reach 90 minutes.

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BS overhead metal doors,commercial metal building doors,commercial steel security doors and frames-ZTFIRE Door- Fire Door,Fireproof Door,Fire rated Door,Fire Resistant Door,Steel Door,Metal Door,Exit Door

BS overhead metal doors,commercial metal building doors,commercial steel security doors and frames-ZTFIRE Door- Fire Door,Fireproof Door,Fire rated Door,Fire Resistant Door,Steel Door,Metal Door,Exit Door