螺旋形(弧形)楼梯多采用金属栏杆,为了便于成型,扶手多数采用金属管,按照弧度的大小热(冷)弯而成。如果镀铬还应根据镀铬槽的大小来确定每段的长短,经试装后拆下,在行表面处理,再组装。若采用木质扶手,一般根据弧度的大小及接头长短,选用大于成品断面的规格木料, The spiral (arc-shaped) stairs are mostly made of metal railings. In order to facilitate molding, most of the handrails are made of metal pipes, which are formed by hot (cold) bending according to the size of the arc. If chrome plating should be based on the size of the chrome plating tank to determine the length of each section, after the test equipment removed, in the line surface treatment, and then assembled. If wooden handrails are used, the size of wood that is larger than the finished section is generally selected based on the size of the arc and the length of the joints.