| 摘要 |
PURPOSE:To reduce the number of assembling part items of a staircase and simplify the structure to reduce the cost and the number of assembling processes, and also simplify the assembling of the staircase in a constructing site to reduce the number of processes. CONSTITUTION:The upper end part of a riser part 1b is butted, after chamfered to 45 deg., to this side end part of a step board part 1a provided in a staircase unit substantially at a right angle thereto, and adhesively fixed and integrated thereto, whereby a step board set 1 is formed. This step board set 1 is further mounted on a girder 2, whereby the staircase unit is assembled. |
