Natural smoke exhaust
8.2. 1
Except that the building height exceeds
50
m
A class of public buildings with a building height exceeding.
100
m
Outside the residential building, near the external wall
The smoke-proof stairwell and its antechamber, the antechamber of fire elevator and the common antechamber should adopt natural smoke exhaust.
8.2.2
The window area of natural smoke exhaust shall meet the following requirements:
8.2.2. 1
The openable external window area of the smoke-proof stairwell and the front room of the fire elevator room should not be less than.
2.00
㎡
, share the front room.
Should not be less than
3.00
㎡
8.2.2.2
The sum of the total area of the openable external windows of the smoke-proof stairwell near the external wall shall not be less than.
2.00
㎡。
8.2.2.3
Exceeding length
60
m
The openable external window area of the internal walkway should not be less than the walkway area.
2%
8.2.2.4
The openable external window area of the room that needs smoke exhaust should not be less than the room area.
2%
8.2.2.5
Clearance height is less than
12
m
The area of the openable skylight or high side window of the atrium should not be less than that of the atrium.
5%
8.2.3
The front room or shared front room of the smoke-proof stairwell adopts open balconies, niches or openable exterior with different orientations of the front room.
When the windows naturally smoke, the stairwell can be free of smoke prevention facilities.
8.2.4
The smoke exhaust window should be set above, and there should be a device that is easy to open.
8.3
Mechanical smoke prevention
8.3. 1
The following parts of mechanical pressurized air supply shall be provided with independent smoke prevention facilities:
8.3. 1. 1
Smoke-proof stairwell, front room of fire elevator room or shared front room without natural smoke exhaust conditions.
8.3. 1.2
The smoke-proof stairwell with natural smoke exhaust measures does not have the front room with natural smoke exhaust conditions.
8.3. 1.3
Closed refuge floor (room)
8.3.2
Smoke-proof stairwell and its front room of high-rise building,
The mechanical pressurized air supply volume of shared front room and fire elevator front room shall be calculated according to the following formula.
It doesn't matter
Or by the table
8.3.2- 1
Zhibiao
8.3.2-4
The rules and regulations have been determined.
When the calculated value is inconsistent with the table,
I think so.
Determine a larger value.
Pressurized air supply in smoke-proof stairwell (no air supply in front room)
table
8.3.2- 1
System burden layer
Pressurized air supply (
m
three
/h
)
Tisch
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