Help, what is the minimum distance between evacuation stairs in a public building.

The most popular point is "the distance between the evacuation passage and the farthest point in the building is not more than 20 meters", you can do the math.

However, this 20 meters is not necessarily a straight-line distance, but a distance from the passage where people can escape!

Do the math yourself!

Upstairs is talking about the norms, according to the norms, but you have to understand the norms, otherwise the fire department will still check you!

The distance between the evacuation route and the farthest point in the building is not more than 20 meters. So the distance between the two stairs is a maximum of 40 meters.

Code for Fire Protection Design of Buildings GBJ 16 87 (partially revised in 2001) The number of safety exits for public buildings and corridor-type residential buildings shall not be less than two, but one may be set up if the following requirements are met:

1. When the area of a room does not exceed 60m2 and the number of people does not exceed 50, a door can be set up; In a room at the end of the corridor (except for nurseries and kindergartens), when the straight-line distance from the farthest point to the door of the room does not exceed 14m, and the number of people does not exceed 80, a door can also be set up that opens outward, but the net width of the door should not be less than. There should be no less than 2 evacuation exits for singing and dancing entertainment screening and amusement venues. When its construction area is not more than 50m2, 1 evacuation exit can be set.

Note: Check the fire code

Thank you so much for sharing on the first floor! Learned.

The minimum width of the evacuation staircase should not be less than meters. The minimum clear width of the evacuation exit in the plant should not be less than; The net width of the evacuation walkway should not be less than; The minimum clear width of the evacuation staircase should not be less than the total clear width of the outer door on the first floor, and the minimum clear width of the door should not be less than.

Evacuation staircase basic requirements(1) The 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; Moreover, the wall itself should have good fire resistance, and the fire resistance limit should be more than 2 h.

2) The stairwell and its front room should not be attached to the boiling water room, combustible material storage room, non-enclosed elevator shaft, combustible gas pipeline, Class A, B and C liquid pipelines, etc.; If the combustible gas pipeline in the residence must pass through the stairwell horizontally in a local area, reliable protection facilities should be taken.

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.

The horizontal clear distance between the two steps of the evacuation staircase of public buildings should not be less than 150mm.

Safety exits should be set up in different directions. The safe evacuation distance shall meet the following requirements:

1. The distance from the farthest point in the room to the door of the room should not exceed 15m

2. The maximum distance from the room to the nearest safety exit: the hospital should be 24m; The hostel should be 30m in size; Other works should be 40mRooms located on either side or at the end of a pocket walkway should not be more than half the corresponding distance mentioned above.

The minimum width of evacuation stairs in residential areas must be greater than that of high-rise public buildings.

In addition, the main evacuation staircase should comply with the following provisions: the tread width should not be less than, the tread height should not be greater than, the continuous tread should not exceed 18 steps, when more than 18 steps, an intermediate rest platform should be added, and the width of the stair platform should not be less than the width of the staircase, and should not be less than.

When using the spiral staircase as an evacuation ladder, it must meet the requirement that the tread width should not be less than the handrail or simple wall of the inner ring, which is clearly stipulated in the fire code.

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

Six-storey office buildings are covered by the Code for Fire Protection Design of Buildings

2. The fire evacuation distance is applicable to the article of the "Code for Fire Protection Design of Buildings".

3. There are two situations: one is when the room is in two safety exits.

between the maximum evacuation distance of 40 meters; The second is when the room is at the end of the hallway or the bag-shaped walkway.

On both sides, the maximum evacuation distance is 22 meters. When the number of users is less than 50, the minimum width of stairs, walkways and doors can be appropriately reduced; But the minimum width of the door should not be.

Less than. 2) The width specified in this article and the relevant provisions of this Code refers to the net width.

Generally speaking, the number of safety exits should not be less than two (except for those with small surface area and few on-site operators);

The width of the aisles and stairs is based on the maximum number of people that can be accommodated on the floor and the ability to quickly evacuate the scene in the event of an accident.

design, so it must be unblocked, not to pile up at will, let alone stack flammable and explosive materials.

The evacuation door should be sparse.

Loose direction opening, can not use hanging doors and side sliding doors, it is strictly forbidden to use turnstile doors, and it is required that the door handle can be pushed open at any time inside.

Doors, it is forbidden to lock them. Evacuation doors should not be set with thresholds.

According to the "GB50016-2006 Code for Fire Protection Design of Buildings", the number of safety exits for each fire partition in a public building and each floor in a fire protection zone shall be calculated and determined, and shall not be less than 2. A safety exit or evacuation staircase may be provided when one of the following conditions is met:

1. Except for nurseries and kindergartens, single-storey public buildings with a construction area of less than or equal to 200 m2 and no more than 50 people;

2. Except for hospitals, nursing homes, buildings for the elderly, nursery schools, kindergartens, children's rooms and children's playgrounds and other children's activity places, etc., the floor public buildings that meet the requirements of the table.