Steel fire doors not only have the functions of ordinary doors, but also play a more significant role in preventing the spread of fire and smoke, which can prevent the spread of fire for a certain period of time to ensure the safe evacuation of people. The facades of steel fire doors are generally made of cold-rolled steel plates, and the products of fire doors are classified by fire resistance grades. Different grades determine the thickness of steel plates, which directly determines their fire resistance grades.

First, the fire door installation problems

1. The opening direction does not meet the requirements, and it is not opened in the evacuation direction; The fire resistance limit of the fire door does not meet the requirements, and it is not installed according to the requirements of fire protection level.

2. Less or no door closers are installed. Door closers must be installed for fire doors located in passages and stairs. If there is no door closers, the normally closed requirements will not be met.

3. Lack of installation hardware fittings. According to the size of the fire door, a larger fire door should be equipped with three hinges, and only two screws should be installed for a single page with four screw holes, which reduces the fixing strength.

4. The middle seam is large, the two sides are connected, the separation is not strict, and the smoke is easy to pass, which does not play a role in fire separation; The distance from the ground is too large, and the distance from the ground of the door should be controlled within the range of 6-8mm; The crack of the door should be controlled in 1.5-2.5 mm according to regulations; Steel door frames should be filled with cement mortar or rock wool, and some are not filled when installed.

5. The hole at the side of the fire door or above the fire door is not blocked; Install non-fireproof hardware fittings and door locks; The gap between the installed fire door frame and the wall is not blocked.

As a kind of fireproof partition with low cost and convenient installation, steel fireproof doors are widely used in the firewall openings, stairwell entrances and exits, pipe shaft openings and other parts of industrial and civil buildings, which plays a very important role in preventing the spread of fire and smoke and ensuring the safe evacuation of personnel.

Second, the steel fire door safety construction measures

1. It is forbidden to wear slippers, high heels, shoes with nails or barefoot to enter the construction site, and it is necessary to wear a safety cap when entering the site.

2. Materials should be stacked smoothly. Tools should be put into the tool bag conveniently, and tools should not be thrown when passing objects up and down.

3.Electrical tools should be equipped with electric shock protectors to ensure safety; Always check whether the hammer handle is loose and whether the electric tools such as hand drill have leakage.