Recognised Common Practice
Current at: 10 May 2010 (E)
The following publication types provide recognised BCA outcomes for common local practices:
Common Practice Interpretations
These describe how a BCA provision is applied. They are developed from discussions with regulators, building surveyors and experts-in-the-field and recognised by the Building Commission. They are prescriptive and can only be used as published.
Common Practice Solutions
These describe a common local practice that has been verified by expert opinion or the like and is recognised by a Building Commission Advisory Note as being equivalent to BCA design and/or construction. They are prescriptive and can only be used as published.
Downloads are listed alphabetically under each type heading. Each title has a brief description and a link to an expanded summary. The full text, complete with construction descriptions and/or expert evidence (as applicable) can be read and then downloaded by clicking the link at the foot of the summary text.
Common Practice Interpretations
Common local practice is to use bulk insulation at ceiling level. This Common Practice Interpretation clarifies how “ceiling insulation area” is calculated for Energy Efficiency compliance.
Common Practice Solutions
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.
Common local practice is to use the deemed-to-satisfy assessment method to verify (Class 1 Building) Energy Efficiency compliance. This Common Practice Solution is an update of the 2006 version ABCB Glazing Calculator Add-Ons and includes BCA 2009 Energy Efficiency amendments and reporting for the WA Additions (5 Star Plus).
Common local practice is to use “dome skylights” to provide natural light to internal spaces. This Common Practice Solution has been developed to take advantage of skylight natural lighting performance that is three times that of vertical glazing, and to provide the generic thermal performance data required to verify energy efficiency compliance.
Project Sponsors: BGC Residential, Summit Home Improvements and Summit Homes
Common local practice is to use a standardised metal fascia as the junction between of the eaves soffit and roof cover. This Common Practice Solution has been developed to provide a standardised metal fascia for zero lot wall construction that allows for more efficient work practices to achieve Fire Separation compliance.
Project Sponsors: Roofing Tile Association of Australia (RTAA)