Bottom plate anchors
Calls to the BRANZ Helpline indicate that there is still confusion about the correct use of bottom plate anchors with concrete floor slabs.
Bracing
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Subfloor bracing
By Tom Edhouse – 1 October 2012, Build 132
In Build 131 (pages 29–30), we explained the information needed before starting bracing calculations for a building. This time, we work through a subfloor example.
Bracing ratings
By Graeme Beattie, Stuart Thurston – 1 April 2014, Build 141
Recent BRANZ testing has quantified the bracing ratings of some common older generic bracing systems. These ratings will be useful during repairs or renovations of older buildings.
Bracing supplement
1 April 2014, Build 141 Supplement
Providing sufficient bracing capacity for wind and earthquake is an integral part of the design process.
Calculating bracing when renovating
By Alide Elkink – 1 October 2018, Build 168
A question frequently asked by readers is how do you compensate for the bracing that is removed when demolishing an internal wall during a renovation or refurbishment? We have some advice.
Bracing for suspended floors
By Roger Shelton – 1 June 2013, Build 136
BRANZ has been asked recently for help interpreting NZS 3604:2011 bracing provisions for buildings with suspended subfloor structures. Here are a few pointers.
Stabilising floor joists
By Roger Shelton – 1 June 2019, Build 172
Where is blocking required to stabilise floor joists? We look to NZS 3604:2011 Timber-framed buildings for answers.
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.
Use of let-in plywood bracing
By David Carradine – 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.
Bracing ratings
By Graeme Beattie – 1 October 2014, Build 144
Following feedback on the previous article on bracing ratings (Build 141, pages 39–40), we have rounded the ratings for use on existing and renovated walls for a more user-friendly table.
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