| 摘要 |
PROBLEM TO BE SOLVED: To provide an easy-to-construct ceiling backing structure for a level-difference ceiling.SOLUTION: A ceiling backing structure 1 includes an upper stage joist supporting member 11, a lower stage joist supporting member 12 arranged at a lower position than the upper stage joist supporting member 11, a vertical joist supporting member 13 hung down from the upper stage joist supporting member 11 until reaching the end of the lower stage joist supporting member 12, and a reinforcing oblique member 14 extending obliquely downward from the upper stage joist supporting member 11 until reaching the lower stage joist supporting member 12. A front end 11a of the upper stage joist supporting member 11 is overhung from the vertical joist supporting member 13, the upper end of the reinforcing oblique member 14 is fixed to the front end 11a of the upper stage joist supporting member 11, and the lower end of the reinforcing oblique member 14 is fixed to the lower stage joist supporting member 12 at a position different from a crossing between the lower stage joist supporting member 12 and the vertical joist supporting member 13. |
