First, in order to avoid the illusion when going up and down the stairs, the height of the first step and the last step of the stairs should be consistent with other levels. If you need to change it, it should be controlled within 4 cm, preferably no more than 2 cm to 3 cm.
Second, the highest level of stairs to the ceiling height, need to have a clearance of more than two meters, the minimum is not less than 1.8 meters. Otherwise it will create a sense of oppression
Third, the spacing of the railings: the distance between the center of the two railings is 8 cm, not more than 12.5 cm, so as not to let the children stick their heads out of the gap.
What is the standard width size of the indoor staircase?
Fourth, the height of the armrest: to the waist position, 85 ~ 90 cm, the handrail diameter is 5.5 cm.
Fifth, step height and depth: the step height should be 15~18 cm, and the step depth is 22~27 cm. The order is about 15 steps. If it is too high, you may need to set up a stair rest platform.
Sixth, the width of the stairs: when the space is empty, the net width is not less than 75 cm; when there are walls on both sides, the net width is not less than 90 cm.
Seventh, safety: Stair parts should be smooth, round, without protruding, sharp parts. For families with children, the slope of the stairs should be slow and the angle of rotation should not be too large; the stair steps should be anti-slip measures, such as anti-slip strips, anti-slip mats, anti-slip grooves, etc.
Eighth, stair lighting: the light is too dark to be safe for walking, the lighting is too bright and easy to appear glare. Therefore, the stairs should be soft and clear
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