When designing fire doors in buildings, designers should set fire doors in a reasonable manner based on the nature and type of the building, strictly in accordance with the requirements of fire protection technical standards, and shall not reduce the level of fire doors at will.
1. In the parts of the building where there is a large daily flow of people and the use of fire doors is high, priority should be given to the design of normally open fire doors. The function of normally open fire door mainly relies on electromagnetic release valve or magnetic door stopper, door closer and automatic control system to complete the self-closing function. When a fire breaks out, it can be closed quickly by itself to avoid the spread of fire and smoke. This design not only facilitates the dispersion of personnel when a fire breaks out, but also prevents damage caused by frequent use of the fire door.
2. When designing the fire doors in the front room of the closed stairwell and smoke-proof stairwell without a positive pressure air supply system, it should be considered that the distance between the fire door and the ceiling should not be less than 500mm, so that in the event of a fire accident, it can effectively avoid the dispersion of people When the smoke enters the stairwell, the anti-smoke effect of the stairwell can be ensured.
3. When designing fire doors for stairwells and front rooms with a positive pressure air supply system, it should be considered that the single opening area of the fire door matches the positive pressure air supply volume. If the opening area of the fire door is too large, when the fire breaks out, the positive pressure air supply system in the stairwell is operating due to wind pressure, which may cause the fire door to open not smoothly, which is not conducive to the rapid dispersion of people.
