By Angela Liu, Roger Shelton
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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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By David Carradine
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1 August 2021, Build 185
Let-in plywood bracing has a long history of use. Some designers and manufacturers specify it, but some councils don’t permit it. BRANZ has found it doesn’t seem to affect structural integrity and suggests ways to resolve the uncertainty.
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By Greg Burn
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1 February 2021, Build 182
Proprietary wall bracing systems are commonly used to brace a building, but how are braced walls connected to a concrete slab? We look at both NZS 3604:2011 and proprietary wall bracing elements requirements.
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By Martin Connell
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1 June 2021, Build 184
When builders are on site to carry out home renovations or repairs, it is a good time to suggest strengthening the property’s earthquake resistance with actions ranging from removing chimneys to securing the foundations.
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By Roger Shelton
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1 February 2021, Build 182
While the use of dragon ties in New Zealand residential construction has decreased over recent decades, they remain a simple and cost-effective method to provide bracing solutions to larger rooms. However, BRANZ helpline queries suggest there is still some confusion around when they should be used.
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