Double floor sound insulation structure, double floor sound insulation construction method

摘要

PROBLEM TO BE SOLVED: To provide a sound insulation structure of double floor capable of effectively shutting off sound radiation from a vertical piping disposed in a pipe space, which needs little time and effort for construction and maintenance.SOLUTION: A double floor is constructed following a floor precedence method, in which an upper floor 2 is supported by plural floor support members 3 disposed on a lower floor 1 in a living room R. A fiber sound absorption material 4 is disposed neighboring to a vertical piping P extending through the lower floor and the upper floor in a lower area below an upper floor of a partition wall W disposed on the upper floor. The upper end 41 and the lower end 42 of the fiber sound absorption material come into close contact with the rear face 22 of the upper floor and the surface 11 of the lower floor respectively.SELECTED DRAWING: Figure 1