(SEE SECTION 4.02.06 (N))
403.2. Compliance with the aircraft sound isolation performance standards shall be established by certification from a registered professional architect or engineer that when constructed in accordance with the approved plans and with quality workmanship, the building shall achieve the specified interior noise levels, or by the use of assemblies having the Sound Transmission Class ratings specified in Table 403.2.
TABLE 403.2. MINIMUM SOUND TRANSMISSION OF ASSEMBLIES
| % Openings | Noise Reduction | Exterior Walls and Roofs | Exterior Doors, Windows and Sloped Glazing |
| 1—25% | 35 Ldn 30 Ldn 25 Ldn | 50 45 39 | 42 37 28 |
| 26—70% | 35 Ldn 30 Ldn 25 Ldn | 55 50 45 | 45 41 37 |
Standard for Sound Control/1988
Source: Southern Building Code Congress International, Inc., SBCCI Standard for Sound Control SSTD 8-87, Copyright 1987