| 摘要 |
PURPOSE: To provide strong installing metal fittings whose installation is easy by fixing L shaped cross-sectional installing tools having installing plates on both ends to the reverse side of joining parts between footboards and riser plates, and fixing them to girders by both side installing plates. CONSTITUTION: Machine screws and nails or the like are inserted into plural installing holes arranged in horizontal pieces and vertical pieces of L-shaped cross-sectional installing tools 10, and these are fixed to the reverse side of joining parts between footboards 18 and riser plates 19, and are fixed to girders by both side installing plates 12. In this fixation, machine screws are inserted into the installing holes 20, and are installed so as to be freely mountable and demountable. Wooden stairs are reinforced, and can also be easily removed and disassembled at reform time or the like. Therefore, reinforcing metal fittings whose construction work is easy can be simply provided. |
