CEILING STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a ceiling structure capable of obtaining good noise insulating performance at a low cost against impact noise resulted from a heavy floor.

SOLUTION: The ceiling structure comprises beams 1 as the basic members of the ceiling; a plurality of cradlings 2 etc. supported from the beams 1 by means of suspension members 3; ceiling panels 4 fixed to the bottom surface of the cradlings 2 etc.; and a plurality of dynamic dampers 5 are arranged at the cradling 2 etc. having a total weight almost equal to one third to one fifth of the weight of the floor laid above. In this way, the total mass of the dynamic dampers 5 etc. required for fully exerting an effect of reducing the impact noise resulted from the heavy floor above can be decreased thereby realizing a lower cost for building the ceiling structure.

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