Sec. 8-15.505. Floors.

   (a)   Vent openings to underfloor areas of wood framed floors shall be provided with acoustic vent baffles that meet noise reduction levels shown in Table 15-A. Vent baffles shall be fitted with one-fourth (¼) inch mesh screen.

Table 15-A
Octave Band Center Frequency, Hz	Sound Transmission Loss, dB
125	4
250	5
500	6
1,000	9
2,000	10
4,000	12

 

   (b)   Underfloor access doors shall be nonvented plywood or other weatherproof material.

(§ 2, Ord. 2616, eff. June 20, 1996)