Which buildings need to have smoke proof stairwells

1. A high-rise plant with a height of more than 32m and more than 10 people on any floor.

2. A class of high-rise civil buildings.

3. Building height.

A Class II high-rise public building over 32m.

4. Class II high-rise residential buildings with a building height of more than 33m.

Building. 5. When the number of underground floors is 3 or more, and the height difference between the basement floor and the outdoor entrance and exit floor is greater than 10 meters.

Open stairwell: only applicable to unit-type high-rise residential buildings with 11 floors and below, and the door to the stairwell is required to be a Grade B fire door, and the stairwell should be close to the external wall, and should have direct natural lighting and natural ventilation.

Enclosed stairwell: suitable for podiums of 24m and below, Class II high-rise buildings with a building height of no more than 32m, as well as unit houses with 12 to 18 floors, and corridor houses with 11 floors and below.

Smoke-proof stairwell: suitable for Class I high-rise buildings, Class II high-rise buildings with a height of more than 32m, tower houses, unit houses with 19 floors and above, and corridor houses with more than 11 floors.

Therefore, an open stairwell is an unenclosed stairwell, and the range of unenclosed stairwells is larger.

Garter houses below multi-storey (below seven storeys) are certainly not needed.

The following situations need to be set up in the stairwell: Nara.

1. Buildings with a height of more than 32 meters, second-class buildings and tower houses, except for units and corridor houses, should be equipped with smoke-proof stairwells. The entrance to the stairwell should have a front room, terrace or alcove.

2. When there is no natural lighting and natural ventilation, smoke prevention and smoke exhaust facilities should be set up in the stairwell according to the regulations, and fire emergency lighting facilities should be set up according to the regulations. Smoke-proof vestibules, open balconies or alcove corridors should be set up at the entrance to the stairwell. The vestibule is available with a fire elevator.

The front hall is used as a supporting device.

Class I buildings and building heights other than unit-type and corridor-type dwellings.

Category II buildings over 32m and tower houses should be equipped with smoke-proof stairwells.

The setting of smoke-proof stairwells shall comply with the following provisions:

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

The area of the front room, a public building.

should not be less than, residential buildings should not be less than.

The doors to the front room and stairwell should be Class B fire doors.

and should be opened in the direction of evacuation.

Closed stairwells shall be provided for podiums and Class II buildings with a building height of no more than 32 m, except for unit-type and corridor-type houses. The setting of the enclosed stairwell shall comply with the following provisions:

The stairwell should be close to the exterior wall, and should have direct natural lighting and natural ventilation, when direct natural lighting and natural ventilation are not possible, it should be set up according to the provisions of smoke-proof stairwells.

The stairwell should be equipped with a Class B fire door and should be opened in the direction of evacuation.

When the first floor of the stairwell is immediately connected to the main exit, the walkway and foyer can be included in the stairwell to form an enlarged enclosed stairwell, but it should be separated from other walkways and rooms by fire protection measures such as Class B fire doors.

The evacuation staircase of each unit of the united dwelling shall lead to the roof, and the setting of the evacuation stairwell shall comply with the following provisions:

Units with 11 storeys or less may not have enclosed stairwells, but the doors leading to the stairwells should be Grade B fire doors, and the stairwells should be close to external walls, and should have direct natural lighting and natural ventilation.

12-storey and 18-storey unit-style dwellings should have enclosed stairwells.

Units with 19 storeys or more should be equipped with smoke-proof stairwells.

Corridor-style dwellings with 11 floors and below should be provided with enclosed stairwells; Corridor-style dwellings with more than 11 floors should be equipped with smoke-proof stairwells.

The stairwell and the antechamber of the smoke-proof stairwell shall comply with the following regulations:

On the interior walls of stairwells and smoke-proof stairwells, no other doors, windows, or openings should be opened except for evacuation doors leading to public walkways and household doors as specified in Article 1 of this Code.

There should be no combustible gas pipes and Class A, B and C liquid pipes in the front room of the stairwell and smoke-proof stairwell, and there should be no protrusions that affect the evacuation.

The gas pipes in residential buildings should not pass through the stairwell, and when they must pass through the stairwell horizontally locally, they should be protected by steel casing, and should comply with the current national standard "Code for Design of Urban Gas".

of the relevant provisions.

The content is described in the "Code for Fire Protection Design of Buildings" and the smoke-proof stairwell shall comply with the following provisions in addition to the relevant provisions of Article 1 of this code:

1. When natural lighting and natural ventilation are not possible, the stairwell shall be equipped with smoke-proof or smoke exhaust facilities in accordance with the provisions of Chapter 9 of this Code, and fire emergency lighting facilities shall be set up in accordance with the provisions of Chapter 11 of this Code;

2. At the entrance of the stairwell, a smoke-proof front room, an open balcony or an alcove should be set up. The smoke-proof front room can be shared with the front room of the fire elevator room;

3. The usable area of the front room: public buildings should not be less than, residential buildings should not be less than; The usable area of the shared front room: public buildings, high-rise factories and high-rise warehouses should not be smaller, and residential buildings should not be smaller;

4. The door leading to the front room of the evacuation walkway and the door leading to the stairwell of the front room should be Class B fire door;

5. In addition to the stairwell door and the front room door, there should be no other door and window openings on the interior wall of the smoke-proof stairwell and its front room (except for the stairwell front room of the residence);

6. The first floor of the stairwell can include the walkway and foyer in the stairwell front room to form an expanded smoke-proof front room, but it should be separated from other walkways and rooms by measures such as Class B fire doors.

Stairwells for evacuation shall comply with the following regulations:

1. The stairwell should be able to provide natural lighting and ventilation, and should be set up against the external wall;

2. There should be no boiling water room, combustible material storage room, and garbage chute in the stairwell;

3. There should be no protrusions or other obstacles that affect evacuation in the stairwell;

4. Class A, B and C liquid pipes should not be laid in the stairwell;

5. Combustible gas pipes should not be laid in the stairwells of public buildings;

6. Combustible gas pipes and combustible gas meters should not be laid in the stairwells of residential buildings. When it is necessary to install a residential building, protective measures such as metal casing and a device to cut off the air source should be used.

Houses below multi-storey (up to seven storeys) are certainly not needed.

Smoke stairwell setup requirements:

1) Smoke-proof stairwells and their front rooms should not be provided with roller shutters, and smoke-proof stairwells and their front rooms are forbidden to pass through or set up combustible gas pipelines;

2) Smoke-proof facilities should be set up;

3) The area of the front room, for public buildings, high-rise factories (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 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 projects should not be less than 10;

4) The door of the evacuation walkway leading to the front room and the front room leading to the stairwell should adopt a Class B fire door, and should be opened in the direction of evacuation;

5) In addition to the entrance and exit of the stairwell and the front room, the positive pressure air supply outlet provided in the stairwell and the front room of the residential building and the front door of the stairwell, the smoke-proof stairwell and the inner wall of the front room should not be opened other doors, windows, and openings;

6) The first floor of the stairwell can include the walkway and the foyer in the front room of the stairwell to form an enlarged front room, but it should be separated from other walkways and rooms by using Class B fire doors.

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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. The following will introduce to you what are the conditions for setting up smoke-proof stairwells.

Smoke stairwell setup requirements:

1. The smoke-proof stairwell and its front room are covered by the shouting, and the first Zhaoye cannot set up roller shutters, and the smoke-proof stairwell and its front room must 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, for example, for some public buildings and high-rise factories (warehouses), these places can not be less than 6, 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 projects 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 relatively safe to use.

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 is helpful to you.

Do the math of how much it will cost you to renovate your home

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.