Table 1
Airborne Sound Transmission Class (STC)* | ||
Partitions | Floors | |
Resident's room to resident's room | 35 | 35 |
Corridor to resident's room | 35 | 35 |
Public space to resident's room** | 40 | 40 |
Service areas to resident's room*** | 50 | 50 |
*STC shall be determined by tests in accordance with methods set forth in ASTM Standard E 90 and ASTM Standard E 413.
**Public space includes lobbies, dining rooms, recreation rooms, treatment rooms, and similar places.
***Service areas include kitchens, elevators, elevator machine rooms, laundries, garages, maintenance rooms, boiler and mechanical equipment rooms, and similar spaces of high noise. Mechanical equipment located on the same floor or above residents' rooms, offices, nurses stations, and similar occupied spaces shall be effectively isolated from the floor.
Iowa Admin. Code r. 481-60.7