What is the evacuation radius of a fire staircase?

Room evacuation door leading directly to the evacuation walkway to the nearest safety exit.

The maximum distance standard, the teaching building underground or above the second floor above the ground (including the second floor), in fact, there is no direct safety exit to the outside, and the stairwell or closed stairwell here can be regarded as a safety exit during evacuation.

1 The total width of the evacuation staircase on each floor shall be calculated according to the provisions of this table. When the number of people on each floor is unequal, its total width can be calculated in layers, and the total width of the lower staircase is calculated according to the number of people on the upper floor with the largest number of people on the first floor.

2 The total width of evacuation doors and walkways on each floor shall be calculated according to the provisions of this table.

3. The total width of the outer door on the ground floor shall be calculated according to the number of people on the first floor with the largest number of people above the floor, and the outer door that is not for the evacuation of people upstairs can be calculated according to the number of people on this floor.

4. The number of evacuees in the video hall and screening hall shall be calculated according to the building area of the venue in m2; The number of evacuees in other singing and dancing entertainment screening and amusement venues shall be calculated on a per capita m2 basis based on the floor area of the venue.

5 3 14 Thresholds should not be set at the entrance doors and Taiping gates of crowded public places and audience halls, and their width should not be less than 1 40m, and no steps should be set up in the doorways.

The Taiping door should be a push-latch type external door.

Outdoor evacuation alleys in crowded public places should not be less than:

The minimum width of the evacuation staircase is as follows:If it is the minimum flight width of a single evacuation staircase, the net width of the evacuation staircase of a multi-storey public building should not be less than, high-rise buildings, according to the provisions of the hospital is, residential is, and others. Commercial buildings are required regardless of whether they are high-rise or not, and the clear width of the staircase with a railing on one side of the residential buildings with six storeys and below is only 1m.

Evacuation staircase setting requirements specification1. It has certain ventilation conditions and natural light conditions, and can be set by the outer wall of the building, and the horizontal distance between the exterior wall windows of the stairwell and the front room and the doors and windows on both sides and the perimeter of the opening shall not be less than 1 meter.

2. The evacuation staircase cannot be set up with boiling water room, combustible storage room, garbage chute and other places.

3. Do not place obstacles or other protruding objects that affect the evacuation staircase and disperse the crowd.

4. The smoke room of the evacuation staircase and other locations cannot be set up to block the light and vision, and the liquid pipe fittings of Class A, B and C cannot be installed in it.

Minimum clear width (m) of evacuation staircase for high-rise buildings, hospital ward buildings, residential buildings, and other buildings.

Code for Fire Protection Design of High-rise Civil Buildings", Chapter 6 of which stipulates as follows:

The total width of the evacuation staircase on each floor should be calculated according to the number of people passing through it for every 100 people, when the number of people on each floor is not equal, the total width of the lower floor evacuation staircase should be calculated according to the number of people on the upper floor without the largest number of people in the wheel. The minimum clear width of the evacuation staircase should not be less than that specified in the table.

Minimum clear width (m) of evacuation staircase for high-rise buildings, hospital ward buildings, residential buildings, and other buildings.

The fire evacuation staircase is required to be wide in meters, the height is in meters, and the location should be close to the elevator, when a fire occurs, it is convenient for people to escape from the safe area, and it is also close to the external wall to be set up, which is conducive to the evacuation of people, and is also convenient for lighting, ventilation and fire fighting. The group function of fire evacuation staircase is mainly to facilitate the evacuation of people when an emergency occurs, and it is a commonly used architectural form in multi-storey buildings.

Fire evacuation stairs refer to indoor stairs and outdoor stairs that have sufficient fire prevention capacity to serve as vertical passages. The staircase, which serves as a safety exit, is the main vertical traffic space in the building, which is not only an important passage for personnel evacuation and safe evacuation in the vertical direction, but also an auxiliary offensive route for firefighters to extinguish fires.

When a fire occurs, if the ordinary elevator does not take effective fire and smoke prevention measures, it will generally stop running due to power supply interruption. At this time, the fire evacuation staircase becomes the main vertical evacuation facility. It is a refuge route for the people in Lou Wang Yunyuan, an ambulance route for the injured or the old, weak, sick and disabled, and an offensive route for firefighters, which shows the importance of its role.

The fire evacuation staircase must have a good smoke-proof and fireproof effect. The interior walls of the antechamber of smoke-proof stairwells and enclosed stairwells should not be opened with doors and windows leading to other rooms except for evacuation doors leading to public walkways on the same floor; And the wall itself should have good fire resistance.

Design requirements for fire evacuation stairs: generally according to the width of meters, the height of meters is the most suitable. It is also easy to use, and the width and height specifications are specified.

Stairs are used as a component of vertical transportation between floors in buildings, and are mainly used for transportation links between floors and when the height difference is large. Stairs are also required in multi-storey and high-rise buildings with elevators and escalators as the main means of vertical transportation. Although high-rise buildings use elevators as the main means of vertical transportation, stairs should still be reserved for escape in the event of a fire.

The staircase is composed of continuous rungs (also known as ladders), platforms (rest platforms) and enclosure components. The horizontal projection distance between the lowest and highest steps of the stair is the step length, and the total height of the step is the step height. Stairs have been engraved in the image of a heavy house on bronze objects from the Warring States period in China.

15 In Italy in the 16th century, the interior staircase was liberated from the traditional enclosed space and made it a decorative architectural component with rich changes in shape.

Fire evacuation stairs are used to evacuate people in the event of an emergency, as opposed to buildings with elevators.

Do not put items in the passage, let alone close the entrance and exit of the passage, to keep the passage unblocked, in the building without elevator, the general staircase is the evacuation staircase, and it is not allowed to put items in the passage.

The so-called evacuation staircase is used to evacuate people in an emergency compared to a building with an elevator, and of course, it can also be used under normal circumstances, and there is no restriction on under what circumstances.

However, it is not allowed to place items in the passage, let alone close the entrance and exit of the passage, to keep the passage unblocked, the general staircase is the evacuation staircase, and it is not allowed to place items in the passage.

The building height is higher than 24 meters, please refer to the relevant provisions of the "Code for Fire Protection Design of High-rise Civil Buildings" and the "Code for Fire Protection Design of Buildings" for buildings with a building height of less than 24 meters!

According to the BAI staff density of the ordinary office, 4 people

The evacuation staircase of the six-storey public building is 1800m, if each floor is 1800m, it gets.

Version: 1800 4*1 100=

Special rights offices, large and small meeting rooms are ignored.

If the total area of the six floors is 1800m, then yes.

Because the lower limit of the net width of evacuation walkways and stairs in public buildings is, the final value is taken.

The minimum width of the evacuation staircase should not be less than meters.

It should be calculated based on the clear width of the staircase, (the horizontal distance between the wall and the center line of the handrail or the centerline of the handrail is the width of the staircase) and if the stairwell is a double-run staircase, it is approximately "half" of the total width of the stairwell.

Not enough, there should be a width of more than meters.