Is there a requirement for multi-storey staircase
First, the indoor staircase the width of each ladder should not be less than 1.40m, step height should not be greater than 0. 16m, step width should not be less than 0.28m;
Second, the outdoor step stepping height should not be greater than 0.15m, step width should not be less than 0.30m;
The height of the staircase in the station should not be greater than 0.15m; the step width should not be less than 0.3m.
Public building indoor and outdoor step step width should not be less than 0.30m, step height should not be greater than 0.15m, and should not be less than 0.10m,
Stairway aspect ratio is based on staircase slope requirements and different types of natural body steps (step) requirements to determine, in line with safety and convenience and comfort requirements. Slope is generally controlled at about 30 °, for only a few people use the service staircase is relaxed requirements, but not more than 45 °. Step is 2r + g: horizontal step distance formula, where r for the step height, g for the step width, adults and children, men and women, young adults and the elderly are different, generally in the range of 560 ~ 630mm, juvenile Children in 560mm or so, adults average about 600mm.
There is no way to adjust the staircase width yourself
Have a normative look at this "residential building code" GB 50368-2005
5.2.1 The net width of corridors and public parts shall not be less than 1.20 m and the local net height shall not be less than 2.OO m.
5.2.2 The corridor, the inner courtyard and the roof of the man and other temporary space railings high, six and six below the following should not be less than 1.05m; seven and seven or more should not be less than 1.10m. The railings should be prevented from climbing and the vertical distance between the bars should not be greater than 0.11 m.
5.2.3 The net width of the staircase should not be less than 1.10m. Six floors and six residential buildings, while the width of the ladder with a rail should not be less than 1.OOm. Staircase step width should not be less than 0.26m, step height should not be greater than 0.175m. Handrail height should not be less than 0.90m. Staircase horizontal section railings greater than 0.50m, the armrest height should not be less than 1.05m.
