| 摘要 |
PROBLEM TO BE SOLVED: To lighten members and reduce the cost and further, secure the plane rigidity when many steps are connected to integrally form the stairs. SOLUTION: This PC stairs floor is provided with front side horizontal parts 3, intermediate inclined parts 4 parallel to receive beams 2, and relatively low rearward vertical parts 5 to form a nearly floor slab shape as a whole a plurality of stages (two or three stages) are shaped as well in the same way. When the span is long, reinforcing ribs 6 are provided in the span direction of the rear face. In some cases of a plurality of stages, a clearance used for cleaning of a trough for leakage water installed on the upper face of the receive beams, is formed between the bottom face of the intermediate part and the upper face of the receive beams. |
