Airport Noise in the Vicinity of Perth Airport (Framed Wall) Common Practice Solution

Why Develop a Common Practice Solution?

Common local practice in areas affected by the Statement of Planning Policy 5.1 – Land Use Planning in the Vicinity of Perth Airport is to use cavity masonry, framed and composite (cavity and framing) wall construction is also being used. This Common Practice Solution has been developed to provide a construction description for steel framed wall construction.

Where, When, and Who Can Use This Common Practice Solution?

This Common Practice Solution can only be used in Western Australia, only applies to Class 1 Buildings required to comply with State Planning Policy 5.1, and must be declared to the approving Local Authority prior to the issue of a Building Licence.

This Common Practice Solution describes work outside the scope of the Building Code of Australia Volume 2 (BCA) and therefore DOES NOT verify BCA compliance.

Building professionals are granted Open Exchange Use rights. Users accept the Conditions of Use that apply to all ABLE material.

How is DTC Specification Equivalence Achieved?

Statement of Planning Policy 5.1 – Land Use Planning in the Vicinity of Perth Airport references the Aircraft Noise Insulation for Residential Development in the Vicinity of the Perth Airport – Final Report February 2004.

Table 6 in Section 4 of the Report nominates STC/Rw Ratings for building elements in a range of noise attenuation (construction) packages. Section 6 includes Packages 1-to-4 in the Deemed-to-Comply Specification (DTC) that applies to Class 1 Buildings in areas above the 25 ANEF aircraft noise exposure contour.

Package 1 (Base Level Construction) includes a requirement for walls (double masonry with cavity) to achieve an STC/Rw Rating of 50. Expert evidence is provided to verify that framed wall construction achieves an STC/Rw Rating of 50 and therefore meets the performance required of DTC Specification construction.

Note: The DTC Specification includes a range of additional construction requirements. A survey of current industry and regulator practice suggests that, of these addition requirements, the specification provided for ceiling and roof construction is not sufficient to provide a common understanding of what is required. Both affect construction affordability and performance, bit there is insufficient information in the report to verify potential equivalent to DTC Specification construction options that may enable industry to achieve a better compliance outcome.

What Evidence is Provided To Verify DTC Equivalence?

Click the link below for the full text which includes a construction sketch and expert evidence.

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