【预购】一小时防火门 -（单扇）3' X 7' 含申请消防执照 - 门尺寸812mm X 2048mm，门框尺寸900mm X 2135mm，附带门五金配件

Fire Door – 1Hour

Afire dooris a type of door, or barrier used as apassive fire protectionitem within buildings to prevent the spread of fire or smoke which may consist of dangerous chemicals. It is usually the only means of allowing people to pass through a fire-resistance rated wall assembly.

Fire doorsare made of a combination of materials, such as: timber, steel, gypsum (as an endothermic fill), vermiculite-boards.