Installation requirements for steel fire doors
During the installation process of steel fire doors, considering the bending deformation of the door frame, it should be supported by wooden slats in the width direction of the door frame. Then make a hole in the wall on the upper corner of the door frame, pour concrete of cement, sand and expanded perlite (1:2:5), and it can be used after the concrete is solidified.
The national standard has clear requirements on the size of the gaps at the lap joints of fire doors: for steel fire doors, the overlap between the fan and the door frame is required to be no less than 10mm, and the gap between the fan and the door frame on both sides should not be greater than 4mm. After the fire door is installed and closed, the gap should not be too large, otherwise the airtight performance of the fire door is difficult to guarantee, and it is difficult to reflect its function of suppressing the spread of fire and smoke under fire conditions.
Therefore, the width of the gap in the installation of fire doors must be strictly controlled. Installation according to these standards can ensure the effective function of fire doors to a certain extent. Consumers must supervise when hiring construction units to prevent them from cutting corners and other problems, so as to prevent fire doors from occurring in the event of a fire. cause casualties.