| 摘要 |
PROBLEM TO BE SOLVED: To adopt a thick plate material to a ceiling joist fixing metal fitting 6 of a single fixation type, to execute positioning adjustment and main fixation by machine screw fixing work from a temporarily assembled and fixed state to a ceiling joist receiver 4, to improve the workability and efficiency of strengthening work, to execute earthquake strengthening by closely piling the ceiling joist fixing metal fitting 6 to an existing fixing metal fitting 5 without an aseismic function so as to cover the surface, and to improve the aseismic strength of ceiling backing by the cooperation of both.SOLUTION: At the upper part of a chevron-shaped ceiling joist receiver attaching part 61, a rising piece 63 which rises from an intermediate position within the width of the ceiling joist receiver 4 and is capable of being bent at the bisecting position and a chevron-shaped ceiling joist receiver holding piece 64 reaching the back surface side from the rising piece 63 are formed. The ceiling joist receiver attaching part 61 is surface-abutted to the ceiling joist receiver 4, the rising piece 63 is pressurized and bent to the back surface side of the ceiling joist receiver 4 to temporarily assemble the ceiling joist receiver holding piece 64 to the ceiling joist receiver 4, and the rising pieces 63 facing each other are fixed with a machine screw to be held by the ceiling joist receiver 4. |
