I bought the residential building to find the stairs when the stairs can only put down half a foot, carefully measure the width of the steps only 22.5CM feel very convenient when the upper and lower, in this help professionals can get a satisfactory answer!
The width is best not less than 25cm, height in 15CM-18cm. If your staircase is now no stone slate, then just right, the slate plus 2.5cm on a side just 25cm.
The stairway is surrounded by stairs and the rest of the resting platform. Can be understood as the middle of the two ladder empty part, that is, by the middle of the middle of the two armrests empty part.
You staircase as the indoor staircase (the more layers or double-class upstairs downstairs for a) can, the provisions of the indoor wide> 220, high not more than 200.
Public staircase (multi-family use), for the width of not less than 260, high not more than 175, there are local norms such as: Beijing / Shanghai / Tianjin and other generally more than the provisions of the 175 slow, at least the same.
If it is the old building, the original specification of the width of the public staircase is not less than 250, the height is not greater than 180. That is the standard staircase step widened, the height slowed down.
As follows:
1, the indoor steps should be 150 × 300; outdoor steps should be about 350 wide, high width ratio should not be greater than 1: 2.5.
2, residential public staircase step width should not be less than 0.26M, step height should not be greater than 0.175M.
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3, residential ladder width should not be less than 1.1M (6 and below the side of the railings can be 1.0M), clearance height of 2.2M.
The height of the steps should be designed according to the slope of the steps and the size of the human feet Size:
1, staircase slope range of 20 to 45 degrees (not more than 38 degrees), that is, between 1: 2.75 to 1: 1.
2, the width of the tread should be the foot of the human foot can all fall on the step is appropriate, the height should also be appropriate to ensure that the stairs have the appropriate slope.
3, the height of the stairs should not be greater than 210mm, and should not be less than 140mm, all levels of step height should be the same, the calculated value can be selected according to Appendix 3 table. (Figure 2.0.4)
4, staircase width, should be used 220,240,260,280,300,320 mm. Note: 250mm can be used if necessary.
5, staircase ladder width should not be less than 1.10m. Six-story and six-storey residential, while the width of the ladder with a railing should not be less than 1m.
Note: The net width of the stairs is the horizontal distance between the wall and the center of the handrail.
