Outdoor steel ladder as a fire evacuation ladder has any requirements
Outdoor evacuation staircase set requirements: (1) stairs and each floor of the export platform application of non-combustible materials production. The fire resistance of the platform should not be less than 1h. (2) in the stairs around 2m within the wall, in addition to evacuation door, should not open other doors and windows openings. The evacuation doors shall be of Class B fire doors and shall not be on the stairs. (3) the minimum net width of the stairs should not be less than 0.9m, the tilt angle should not be greater than 45 °, railings should not be less than the height of 1.1m.
Width greater than 1.5 meters, railings height of not less than 1.25 meters
Hello: If you are building high-level, then apply "high rules", if it is multi-layer, you should apply "rules." The requirements for the evacuation of the outdoor steel staircase should be strictly regulated, as follows: "High-rise civil building design fire safety regulations" 6.2.10: Outdoor staircase can be used as the anti-smoke staircase The minimum net width should not be less than 0.90m. When the tilt angle is not greater than 45 °, the height of the railings is not less than 1.10m, the outdoor staircase width can be included in the total width of the evacuation staircase. Outdoor staircase and each floor of the exit platform, should be made of non-combustible materials. The fire resistance of the platform should not be less than 1.00h. In the wall around the stairs around 2.00m, in addition to evacuation door, should not open other doors, windows, holes. The evacuation doors shall be of Class B fire doors and shall not be on the stairs. 7.4.5: outdoor stairs can be used as evacuation staircase when the following requirements: 1 railings should not be less than the height of 1.1m, the net width of the stairs should not be less than 0.9m; 2 tilt angle should not be greater than 45 ° ; 3 stairs and platform should be made of non-combustible materials. The fire resistance of the platform should not be less than 1.00h, the fire resistance of the staircase should not be less than 0.25h; 4 doors to the outdoor staircase should adopt Grade B fire doors and should be opened to the outside; Around the wall within 2m should not be set on the door and window openings. The evacuation door should not be on the stairs. Hope it helps you!
