| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound insulation ceiling structure in which an impact sound reduction damper can be disposed at a specified position without depending on skills of an engineer and further, even if an earthquake occurs, the impact sound reduction damper is not dislocated.SOLUTION: A ceiling substrate panel 6 constituting a sound insulation ceiling structure comprises an outer frame 61, a reinforcing member 62 provided at a central position in a length direction of the outer frame 61, and cross reinforcing parts 63 provided in approximately rectangular opening portions formed at right and left sides of the reinforcing member 62, respectively. A metal fitting 7 is mounted in a crossing part of the cross reinforcing parts 63 and a ceiling TMD 8 is mounted to the metal fitting 7. |
