| 摘要 |
PURPOSE:To improve the efficiency of production by a method wherein a side part in the shape of a stair having a storage space formed therein and a tread part being an openable cover body form a fundamental unit and sand or an outdoor machine is stored in the storage space. CONSTITUTION:An under surface makes contact with a mount surface and an upper surface supports a tread part 2 and a mount type step unit 1 comprising a stair-shaped side part 3 having a storage space formed therein; and a tread part 2 forming an openable cover body is provided. When the step unit 1 is used as the step of the opening part of a building, the side part 3 forms an oblong frame body having height equivalent to one step and comprises a plurality of side units. Thus, the units are assembled together at a site and mounted for use, whereby production is practicable with high efficiency. |
