| 摘要 |
<p>PROBLEM TO BE SOLVED: To correspond to the correction of a tread and a riser easily, to simplify support works at the time of installation and to omit surface finishing working. SOLUTION: A foundation frame consisting of a pair of side walls 16, in which horizontal sections 12 and vertical sections 14 are continued and formed alternately, and a bottom wall connecting a pair of the side walls 16 is formed. Riser members 22 are bridged to the vertical sections 14 of a pair of the side walls 16 under the state, in which the riser members 32 are brought into contact with the vertical sections 14, tread members 34 are bridged to the horizontal sections 12 of a pair of the side walls 16 under the state, in which the tread members 34 are brought into contact with the horizontal sections 12, the horizontal edges of the tread members 32 and the horizontal edges of the tread members 34 are brought into contact mutually so that concrete is not leaked, and a box body having a space 38 on the inside is manufactured of the foundation frame 10, the riser members 32 and the tread members 34. The internal space 38 of the box body is filled with concrete, and the foundation frame 10, the riser members 32 and the tread members 34 are fixed by the drying of the filled concrete, thus manufacturing the stair.</p> |
