CONSTRUCTION METHOD OF SOUND INSULATION FLOOR STRUCTURE, SOUND INSULATION FLOOR STRUCTURE, FLOOR PANEL BODY, AND BUILDING WITH SOUND INSULATION FLOOR STRUCTURE

摘要

PROBLEM TO BE SOLVED: To improve a heavy impact sound insulation performance of a floor structure, while preventing workability degradation of the floor structure.SOLUTION: An example of this invention is a construction method of a sound insulation floor structure 1, in which an additional beam 3 separating a prescribed span S1 into two separated spans S2 with a same beam interval is placed between main beams 2A, 2B placed parallel to each other across the prescribed span S1, and a floor panel body 4 is placed with the separated span S2. This construction method comprises following processes: making use of a beam interval to calculate a natural frequency of a panel body part 6 included in the floor panel body 4; installing stiffener parts 7a, 7b which cooperate with the panel body par 6 to define a cross-sectional property of the floor panel body 4 when the natural frequency is equal to a lower limit natural frequency or higher, on an undersurface 6a and an uppersurface 6b of the panel body part 6.