1. Fire partitions should be separated by firewalls. When there are difficulties, the fire shutter used to judge the fire resistance limit of the back fire surface temperature rise (the fire resistance limit is more than 3 hours), the fire shutter with closed automatic sprinkler system and the fire water curtain belt not used to judge the fire resistance limit of the back fire surface temperature rise can be used for separation. When installing doors and windows on the firewall, Class A fire doors and windows should be adopted and can be closed by themselves.
2. When there is an automatic fire extinguishing system in the building, the maximum allowable building area of each floor. For local settings, the increased area can be calculated as 1 times the local area.
3. If there are openings such as walkways and escalators connected with the upper and lower floors in the building, the upper and lower floors should be regarded as a fire zone, and the sum of the construction areas should not exceed the regulations.
However, in the atrium of multi-storey buildings, when rooms and walkways are connected to the atrium, there are Class B fire doors or fire shutters that can be closed automatically; Class B fire doors or shutter doors shall be installed in the foyer and passage communicating with the atrium; There are automatic fire alarm system and automatic sprinkler system in the corridors of each floor of the atrium; And when the closed roof is equipped with automatic smoke exhaust facilities, the building areas of the upper and lower floors of the atrium can be calculated without superposition.
4. When there is a fire in the basement and semi-basement, it is difficult for people to evacuate and firefighters to put out the fire. Therefore, the fire zone area should be strictly controlled. It is stipulated that the basement and semi-basement of the building should be divided into fire zones with firewalls, and the area should not exceed 500 square meters.
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