What is the open staircase?
Third, other:
① In addition to the stairwells should be set up for enclosed staircase and smoke staircase (with enclosed and smoke setting range).
② should be set up closed staircase or smoke staircase building, when the number of evacuation stairs to meet the specifications, any adjacent layer area of ??no more than one fire partition area requirements, you can set up open staircase for business use.
Second, residential buildings (open staircase can be used as evacuation of residential buildings):
① one, two-story corridor-style residential buildings.
② non-high-rise open corridors (inner corridors) residential buildings (such as dormitory).
③ unit type and tower type residential building layer is 6 layers and below, and any layer area is not more than 500 square meters.
④ any form of non-high-rise residential buildings, when the household door with a fire door B (hereinafter referred to as B-door), can be used as an open staircase staircase.
⑤ unit-style residential, when the use of B-door, and the staircase between the natural lighting and ventilation, the number of layers 11 and below, can be used as an open staircase staircase.
Open staircase, also known as open staircase, refers to the building by the wall and other enclosing members of the composition of the anti-smoke function, and other space with the use of the staircase.
First, public buildings (open stairs can be used as evacuation of public buildings):
① one, two storey shops and other staff-intensive (including with entertainment) public construction.
② other five buildings and the following public hospital, hospital sanatorium hotel and more than two people with the exception of many places.
③ non-high-rise open corridor (inside corridor) public building (such as teaching building).
