Class 9a buildings are typically health care buildings, including public or private hospitals, a nursing home or similar, for sick or disabled people requiring full time care and clinics and day surgeries.
Sound transmission and Insulation
The objective of providing insulation to reduce sound transmission is to prevent loss of amenity due to undue sound being transmitted between accommodation units, or to a unit from other parts of the building such as plant rooms, lift shaft, common corridors, or from a different classification in the same building for example, car park, shops, commercial premises.
Building requirements
Although providing some level of accommodation, Class 9a building are not bound by the acoustic requirements of Part F5 of the BCA unless the Class 9a portion adjoins one of the following building classifications within the same building:
- Class 2 – residential units
- Class 3 - boarding houses, motels and residential parts of hotels
- Class 9c – aged care buildings
Should a class 9a building share a wall, floor or ceiling with one of the above building classifications, the corresponding acoustic requirements for the adjoining classification should be used in designing that building element.
