| 摘要 |
PURPOSE:To enhance an efficiency in work by mounting an under floor bed board on the upper surface of a circumferential frame made of steel, and thereby concurrently mounting an under layer top bed board on the lower surface of the frame in advance. CONSTITUTION:Each longitudinal frame member 5 is joined with each lateral frame member 6 both of which are made of channel steel, the both ends of each lateral member 6 are formed with narrow width section 26 so as to be coupled in the groove sections of the longitudinal frame members 5, and each structure thus constructed is fixed by the use of each L-shaped fixture 14, so that a circumferential frame 2 is thereby formed. Two base boards 3A and 3B, that is, an inner and an outer board, are rested on the upper surface of the circumferential frame 2 while being piled up, so that an under floor bed board 3 is thereby mounted via each floor joist 12. In addition, and under layer top bed board 4 composed of 2 base boards, that is, an inner and an outer board 4A and 4B, is mounted on the lower surface of the circumferential frame 2 via each furring strip member 10. By this constitution, safety in work can thereby be enhanced. |
