| 摘要 |
PROBLEM TO BE SOLVED: To provide a modifying double floor structure for improving weight impulsive sound insulating performance by reducing weight impulsive vibration transmitted to the lower floor from a new floor part after reforming. SOLUTION: This modifying double floor structure is composed of the new floor part 20 formed in an existing structure having existing beams 4 and existing slabs 6, and laid with clearance above the existing slabs 6, and a new support part 9 for supporting the new floor part 20. The new support part 9 is arranged on an upper surface of the existing beams 4. COPYRIGHT: (C)2005,JPO&NCIPI
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