What is a smoke proof stairwell and what are the requirements for a smoke proof stairwell?

The smoke-proof stairwell is to prevent smoke from entering, and now many houses will make a house like this, so what are its requirements for the setting? A smoke-proof stairwell is a stairwell that has a smoke-proof front room and smoke extraction facilities and is separated from the usable space in the building. Its forms generally include smoke-proof stairwells with enclosed antechambers or shared anterooms, smoke-proof stairwells with balconies as anterooms, and smoke-proof stairwells with alcoves as anterooms.

1) There should be a front room, balcony or alcove at the entrance of the stairwell. (2) The area of the front room should not be less than 6 for public buildings, and the front room shared with the fire elevator should not be less than 10; For residential buildings should not be less than, the area of the front room shared with the fire elevator should not be less than 6; For civil air defense works should not be less than 10. 3) The doors of the front room and stairwell should be Class B fire doors and should be opened in the direction of evacuation.

4) If there is no window, the pipeline well must be provided with positive pressure air supply.

I believe everyone is no stranger to smoke-proof stairwells, but they don't know much about its setting requirements. So, let's share with you what are the requirements for smoke-proof stairwells, and the difference between smoke-proof stairwells and closed stairwells, you can understand.

1. What are the requirements for setting up smoke-proof stairwells?

The requirements for the installation of the stairwell are as follows:

1. There should be a front room, balcony or alcove at the entrance of the stairwell.

2. The area of the front room can not be compared with the public building, and the residential building can not be compared with the small.

3. The doors of the front room and stairwell should use Class B fire doors and need to be opened in the direction of evacuation.

4. In addition to unit-type and corridor-type houses, closed stairwells should be set up if the building height does not exceed 32 meters.

2. The difference between smoke-proof stairwells and closed stairwells.

1. The structure is different.

In contrast to open stairwells, both enclosed and smoke-proof are enclosed, but there are structural differences between them. The enclosed type is to set the stairwell in the room, and the doors and windows are opened inside, and the corridor between the door and the staircase is the only passage. The smoke-proof type is an enclosed space added to the enclosed type.

2. The functions are different.

The smoke-proof stairwell is a building facility composed of fire doors, smoke exhaust equipment, emergency lighting, air supply equipment, etc., which plays a role in preventing fireworks from entering the stairwell and reducing the speed of fire propagation. The biggest effect of the closed type is to evacuate the crowd.

3. The setting requirements are different.

There is a certain difference between the two in terms of setting requirements, the former has relatively low requirements, and the latter has a complex structure, so the setting requirements are high.

4. The applicable environment is different.

Scope of application of closed stairwell: the cherry blossom belt of the unit-type house is 12-18 floors, and the corridor house must be less than 10 floors; ward buildings in hospitals and nursing homes; Scope of use of smoke-proof building ridge staircase: Class II high-rise buildings with a height of no more than 32 meters, as well as factories with a height of less than 32 meters.

Article summary: The above is what are the requirements for the setting of smoke-proof stairwells and the difference between smoke-proof stairwells and closed stairwells, I hope it can help you. If you want to know more, go on.

We know that no matter what is set up, the relevant conditions must be met, so we must be clear in advance before setting, especially the setting of smoke-proof stairwells, pay more attention to it. Next, I will introduce to you what are the conditions for setting up smoke-proof stairwells.

1. The smoke-proof stairwell and its front room should not be set up with roller shutters first, and the smoke-proof stairwell and its front room should also prohibit passing through or setting up combustible gas pipelines;

2. Be sure to remember to set up smoke-proof facilities;

3. The area of the front room should also be paid special attention to, for example, for some public buildings and high-rise factories (warehouses), these places can not be less than 6, and if it is a front room shared with the fire elevator, it is not possible to be less than 10; For residential buildings, then it can not be less than, if it is shared with the fire elevator, the area of the front room can not be less than 6; For civil air defense works should not be less than 10.

4. If the evacuation corridor leads to the forward direction, then the door of the front room leading to the stairwell should adopt the Class B fire door, and should also be opened in the direction of evacuation;

5. In addition to the entrances and exits of the stairwell and the front room, there are also air supply outlets in the stairwell and the front and exterior of the stairwell in residential buildings, so the front and interior walls of these places can not be set up with doors, windows and holes.

6. The first floor of the stairwell can be used to include the corridor and the hallway, and these places also include the front room of the stairwell to form an expanded front room, and these places should be separated by Class B fire doors, etc., which will be safer to use in this way.

Summary: What are the relevant contents of the smoke-proof stairwell setting conditions, some related matters should be paid special attention to when setting up smoke-proof stairwells, especially like some details, if not designed well, it may bring you unnecessary trouble. I hope the above introduction of Pa Min will be helpful to everyone.

1. Roller shutters should not be set up in smoke-proof stairwells and their front rooms, and combustible gas pipelines are prohibited in smoke-proof stairwells and their front rooms.

2. Set up smoke-proof facilities at Songyuan.

3. The area of the front room, for public buildings and high-rise factories and warehouses, should not be less than 6, and the front room shared with the fire elevator should not be less than 10. For residential buildings, the area of the front room shared with the fire elevator should not be less than 6. For civil air defense works should not be less than 10.

4. The door leading to the front room and the stairwell leading to the front room should be a Class B fire door and should be opened in the direction of evacuation.