| 摘要 |
PURPOSE:To simplify construction, to shorten a construction period and to promote a low cost by forming staircases of an upper step side, a middle step side and a lower step side in the shape of a box as units, and connecting them to each other to construct a series of staircases. CONSTITUTION:Staircase units 1, 2 and 3 are formed in the shape of a box. The upper end side on the rear side of the highest staircase unit 1 is fixed with a beam 4. In addition, the lower side of a storing section is used for a passage 5 of the first floor. After that, the upper end sides on both sides of the staircase units 1 and 2 of the highest step and a middle step side are fixed with beams 6 and 6. In addition, the bottom side of the staircase units 2 and 3 of the middle step and lowest step are fixed to a floor surface 7 of the lower floor. Accordingly, the staircase units 1, 2 and 3 are connected to each other to construct a series of staircases. According to the constitution, a storing space is enlarged, and a living space can be substantially enlarged. |
