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Designing houses with unevenly distributed bracing

By Angela Liu, Roger Shelton 1 April 2021, Build 183

While the bracing requirements in NZS 3604:2011 Timber-framed buildings suit most buildings, the distribution rules of clause 5.4.7 are too lenient for some complex designs. During earthquakes, some Building Code-compliant buildings may move or flex, causing extensive damage. BRANZ research found which buildings are affected and suggests changes.

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Specific bracing design

By Angela Liu 1 April 2015, Build 147

Changes are needed after houses with a mixture of NZS 3604:2011 wall bracing and specifically designed bracing performed poorly during the Canterbury earthquakes. BRANZ’s new design procedure for seismic bracing elements in new houses will help.

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