The net width of the fire door reaches 900mm, which can be solved according to the use needs, and the opening height can be selected as 2000, 2100 or 2400mm. If the width of the fire door opening is 900mm, the width of the door leaf will be approximately 780mm. The specific dimensions should be provided by the supplier. Steel double-open fire doors generally have a fire resistance time of up to 1.5 hours. Their door frames and door leaves are made of 1.2mm and 0.8mm galvanized steel plates respectively.

The hinges and door closers are equipped with lining plates. The thickness of the steel plate is at least 3.0mm. Its overall dimensions are 1500*2100 and 1500*2300. The most common sizes of double-open fire doors on the market are 1500*2100 and 1500*2300, and the widest size is 1800*3000. Its width will directly affect its stability, so there are certain requirements on the width.

The role of fire doors

A fire door refers to a door that can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. It is a fire-resistant partition with certain fire resistance located in fire-resistant partitions, evacuation stairwells, vertical shafts, etc.

In addition to the functions of ordinary doors, fire doors also have the function of preventing the spread of fire and smoke. They can prevent the spread of fire within a certain period of time and ensure the evacuation of personnel.