CEILING JOIST INSTALLATION METAL FITTING, AND SEISMIC REINFORCEMENT STRUCTURE FOR CEILING JOIST

摘要

PROBLEM TO BE SOLVED: To provide a seismic reinforcement structure for a ceiling joist capable of seismically reinforcing a ceiling joist holder 3 by enhancing rigidity strength against torsion and deformation by bending of an installation metal fitting 6a on an opening side of the ceiling joist holder even when the installation metal fitting 6a is less in assembly seismic strength compared to an installation metal fitting 6b on a side surface side of the ceiling joist holder, and by having a reinforcing piece 64 for ceiling joist holder firmly hold and support compressive vibration load in an inward direction at top and bottom ends of the reinforcing piece and preventing deformation by bending of the ceiling joist holder for certain, even when the ceiling joist holder 3 is exposed to a vibration load that compresses an opening side thereof in a vertical direction.;SOLUTION: A reinforcing piece 64 for a ceiling joist that is bent for insertion into an opening of a ceiling joist holder 3 is formed on both ends of a ceiling joist holder fitting part 61 of an installation metal fitting 6a on an opening side of the ceiling joist holder disposed on the opening side of the ceiling joist holder 3 for holding and regulating a compressive vibration load in an inward direction on top and bottom surfaces on the opening side of the ceiling joist holder 3 at top and bottom ends of the reinforcing piece, thereby seismically reinforcing the ceiling joist holder 3.;SELECTED DRAWING: Figure 6;COPYRIGHT: (C)2017,JPO&INPIT