| 摘要 |
PROBLEM TO BE SOLVED: To provide a fixing bracket which improves connection strength between members composing a ceiling substrate structure and being orthogonal to each other.SOLUTION: In a ceiling substrate structure which comprises a number of hollow metallic square cylinders 1 arranged parallel to each other at predetermined intervals and a number of metallic members 2 arranged parallel to each other at predetermined intervals and being orthogonal to the metallic square cylinders 1, and hangs the metallic square cylinders 1 or the metallic members 2 from a structure of a building with hanging bolts 3, fixing brackets 27 mounted to both ends of each metallic member 2 in a state where the metallic member 2 is installed between the metallic square cylinders 1 are fixed to the side surfaces 1b of the metallic square cylinders 1 through mounting screws 28, and reinforcing plates 33 are mounted to parts of the metallic square cylinders 1, against which both ends of the metallic member 2 butt, whereby parts where the mounting screws 28 for mounting the fixing brackets 27 mounted to both ends of the metallic member 2 are screwed (that is, the parts of the metallic square cylinders 1, against which both ends of the metallic member 2 butt) are reinforced by the reinforcing plates 33. |
