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命题考点七 楼梯、墙体的建筑构造(Building construction sites seven stairs, wall proposition)
命题考点七 楼梯、墙体的建筑构造(Building construction sites seven stairs, wall proposition)
1A410000 construction technology
1A411000 architectural structure
1A411000 architectural structure section Gufen online test
Building construction sites seven stairs, wall proposition
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[materials] interpretation
Construction of a building, the stairs
1. fire and smoke prevention and evacuation requirements
(1) room stairs and on the inner wall of the staircase is closed, in addition to open door leading to the evacuation of public access in the same layer, should not set up other room doors and windows (except residential). Staircases should have natural lighting, projection is not due to impact of evacuation.
(2) before the indoor staircase and should not be attached to the water storage room, combustible materials, lift well non closed, combustible gas pipeline, a, B and C liquid pipeline etc..
(3) in the house, such as the level of local combustible gas pipeline must be through the staircase, should adopt reliable protection facilities.
(4) outdoor staircases and each exit platform should adopt non burning material. Fireresistance platform should be not less than 1h, the fire resistance limit of stairs should be no less than 0.25h.
(5) for evacuation and evacuation stairs should not be on the ladder channel using spiral staircase and winder. When must be used when the plane angle step two level which should not be greater than 10. And each step, from the depth of handrails at 25cm should not be less than 22cm. The spatial scale of 2. stair requirements
(1) the residential staircase staircase width, when the side of airport, shall not be less than 0.75m; when there is a wall on both sides, should not be less than 0.90m. A stair step width should not be less than 0.22m, the height should be no more than 0.20m, from the angle
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