If it is smoke, smoke through the front room, and finally will not enter the stairs, and no reduction; flow is the same reason, and can not play a role in evacuation, unless it means that some people stay in the front room, then the stairs Does the platform expand the same way?
Anti-smoke front room, should look at a relatively independent security area, it is generally required to set up anti-smoke facilities (depending on the situation using natural smoke or mechanical smoke) to prevent the fire into the stairs affect the evacuation The While the staircase platform to expand, and can not prevent the entry of fire smoke. In what circumstances must be set, you have to look at the "building design fire safety norms" and "high-rise civil building design fire safety norms", the two norms are set to prevent the smoke before the room made specific provisions.
This is a specification requirement
In fact, floor is often a lot of time in front of a pedestrian buffer traffic space, for high-rise buildings such as strict fire requirements of the old more obvious
Mainly to consider the fire when the smoke can be a good place before the fire area and the stairs such as the traffic area separated, once the stairs fire, the formation of chimney, the consequences could be disastrous, and if not the front room, separated by a fire door , The effect is far from the ventilation (natural or equipment) of the stairs in front of the asylum role
You said the smoke into the stairs, not the main contradiction, because the front room and the stairs are required to be ventilated, the key is the front room can be on the stairs of the ignition time delay, virtually strengthen the fire rating
Also, the stairs inside the great flow of people, because there are people upstairs evacuation problem, the stairs can be effectively on the front room can not enter the stairs for the protection of people
I hope my answer is helpful to you
This is required by the building code, with an area of not less than 6 square meters at the entrance of the staircase and equipped with an anti-smoking facility, or a facility for exhaust.
effect:
In fact, floor is often a lot of time in front of a pedestrian buffer traffic space, for high-rise buildings such as strict fire requirements of the old more obvious
Mainly to consider the fire when the smoke can be a good place before the fire area and the stairs such as the traffic area separated, once the stairs fire, the formation of chimney, the consequences could be disastrous, and if not the front room, separated by a fire door , The effect is far from the ventilation (natural or equipment) of the stairs in front of the asylum role
