室内楼梯的每梯段净宽不应小于1.40m;踏步高度不应大于0.16m;踏步宽度不应小于0.28m;室外台阶的踏步高度不应大于0.15m;踏步宽度不应小于0.30m;公共建筑室内外台阶踏步宽度不宜小于0.30m;踏步高度不宜大于0.15m,并不宜小于0.10;