The basic principle is to multiply the business area by the reduction factor to get the calculated area of the business hall, then multiply the calculated business area by the number conversion factor to get the required evacuation number, and then multiply the evacuation number by the evacuation width per 100 people to get the required evacuation width.
Shopping mall building area × area discount coefficient × staircase evacuation coefficient × personnel discount coefficient.
I found you an example:
Suppose we make a 2 1000 square meter shopping mall with a first-class fire resistance.
2000 underground, 3500 on the first floor, 7000 on the third floor and 5000 on the fourth floor.
So, how to calculate their evacuation width?
1. According to the conversion coefficient (person /m2) of the number of people evacuated from the business hall of the low-standard store in 2006, the floor position.
Underground second floor
up and down
The first and second floors
The third floor above ground
The fourth floor above ground
Four or more layers
coefficient of correction
0.80
0.85
0.77
0.60
2. Then, according to the clear width of evacuation walkways, emergency exits, evacuation stairs and room evacuation doors per 100 people,
Primary and secondary
The first and second floors above ground are 0.65.
The third floor above ground is 0.75.
Four floors above ground 1.00
The height difference between the underground building and the ground entrance and exit is not more than 10m, which is 0.75.
The underground building with the height difference between the ground entrance and exit exceeding 10m is 1.00.
3. The number of evacuees in the store is calculated by multiplying the building area of each business hall by the area conversion value and the number of evacuees conversion coefficient. Land quotient
The area conversion value of stores should be 50% ~ 70%, and the area conversion value of underground stores should not be less than 70%.
A: The evacuation width of the underground shopping mall is 2000 x 0.7 x 0.85x1.0100 =11.9m..
The evacuation width of the first and second floors of the shopping mall is 3500x0.5x0.85x0.65/100 = 9.67m..
The evacuation width of the shopping mall on the third floor is 7000x0.5x0.77x0.75/100 = 20.21m.
The evacuation width of the four-storey shopping mall is 5000x0.5x0.6x1.0100 =15m.
Then the underground shopping mall >11.9m.
All floors below and including the third floor should be greater than 20.438+0m.
The four-storey shopping mall is only > > 15M.
Please note: it is greater than, not greater than or equal to!