贵州省贵阳市读者宋勇同志来信问,带中柱螺旋楼梯应如何设计?现回答于下: 带有中柱的螺旋楼梯占地面积少,在空间狭窄的建筑物内,常用这种形式的楼梯。这种楼梯,下楼比上楼费劲,稍一不慎,容易滑倒。因此,在设计时常做成左旋式,即下楼时呈逆时针方向旋转。这样,下楼时沿螺旋楼梯的外侧走(外侧比内侧宽些),用右手扶住楼梯扶手,以策安全。在一般情况下,两层楼盖之间,楼梯踏步在平面上布置成一整圈。踏步高度一般为180～220mm,踏步悬挑长度视需要,宽度根 Comrade Song Yong, reader of Guiyang City, Guizhou Province, wrote a letter asking how to design a spiral staircase in Zhongzhu. The answer is as follows: The spiral staircase with a center column covers a small area and is often used in a space-constrained building. stairs. This kind of stairs is less expensive than the upper floors. It is a little careless and it is easy to slip. Therefore, the design is often made of a left-handed type, that is, counterclockwise rotation when going downstairs. In this way, when going downstairs, walk along the outside of the spiral staircase (the lateral side is wider than the inside), and use your right hand to hold the stair railings for safety. In general, between two floors, the stairs are arranged in a complete circle on the plane. Step height is generally 180 ~ 220mm, step cantilever length as needed, width root