SA Hendry advises that the Specification must be used in conjunction with the Building Code of Australia. Planning policies allow Council to regulate through Noise and Air Emissions Overlay maps. These maps will spatially designate sources of noise, such as major road, rail and mixed land use zones. The overlay maps (as applicable) will be part of each Council Development Plan, in a similar way to bushfire maps.
A development application for a Class 1, 2, 3, 4 or 9c aged care buildings, within or close proximity to a designated noise source may then trigger building requirements under the Minister’s Specification SA 78B.
Applicants will have to determine the sound exposure category and the level of building treatment required to mitigate the noise. These categories are from Category 1 (lowest) to Category 5. Deemed-to-satisfy provisions will apply up to Category 4 (provided in Part C of the Specification) and Category 5 exposure will require an acoustic report to comply (acoustic consultant to formulate an alternative solution).
The deemed-to-satisfy provisions in Part C of the Minister’s Specification, lists standard building treatments, which satisfy the performance criteria of the internal sound levels required under the Specification. (Window glazing, solid doors and seals, wall and ceiling insulation and alternative ventilation systems if necessary).
Ventilation systems, in order to meet the requirements for adequate fresh air and ventilation, noise categories 4 and 5 will require alternative ventilation systems which will provide fresh air to occupants without the need to open windows and doors.