(a) Openable windows. An openable windows in the exterior walls of habitable rooms shall have a laboratory sound transmission class rating of at least STC forty (40) dB and shall have an air infiltration rate of no more than 5 cubic feet per minute when tested according to ASTM E-283.
(b) Fixed windows. All fixed windows in the exterior walls of habitable rooms shall:
(1) Have a sound transmission class rating of at least STC forty (40) dB; or
(2) Shall be five-eighths (
5/8
) inch laminated glass with an STC rating of forty (40) dB and shall be set in nonhardening glazing materials.
(3) Shall be glass block at least three and one-half (3½) inches thick.
(c) The total areas of glazing in rooms used for sleeping shall not exceed twenty (20) percent of the floor area.
(§ 2, Ord. 2616, eff. June 20, 1996)