1. Calculation of personnel density: General factory buildings are different from public buildings, and the personnel are basically fixed. Therefore, there is no specific regulation on the personnel density of the factory building in the specification. The general design evacuation number is the sum of the number of operators and managers.
2. Evacuation width index: the minimum clear width of evacuation exits in the factory building should not be less than 0.9m, the clear width of evacuation walkways should not be less than 1.4m, and the minimum clear width of evacuation stairs should not be less than1.1m..
The total clear width of evacuation stairs, walkways and doors in the factory building shall be determined according to the number of evacuees in the table below. Moreover, the total net width of the first floor external door should be calculated according to the number of evacuees on this floor and above, and the minimum width of the door should not be less than1.2m. ..
3. Evacuation distance index: It is necessary to consider the actual situation of floors (such as single-storey, multi-storey and high-rise), the fire risk category of production and the fire resistance rating of buildings to determine the safe evacuation distance of the factory building. The straight-line distance from any point in the factory building to the nearest safety exit should not be greater than the provisions in the table below.
As can be seen from the table, the greater the fire risk, the stricter the requirements for safe evacuation distance, and the lower the fire resistance rating of the factory building, the stricter the requirements for safe evacuation distance.