Retrofitting to resist extreme wind
Strong wind causes damage to houses, particularly their roofs. A recent BRANZ study started by defining ‘extreme winds’ before developing retrofit solutions to ensure roofs on older houses are adequately secured.
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Bracing supplement
1 April 2014, Build 141 Supplement
Providing sufficient bracing capacity for wind and earthquake is an integral part of the design process.
Deck barriers
By Alide Elkink – 1 April 2013, Build 135
Where it’s possible to fall 1.0 m or more from a deck, the Building Code requires a barrier able to withstand all imposed, wind and impact loads. We look at some options.
Joining roof trusses
By In Ling Ng – 1 October 2015, Build 150
Most timber trusses are delivered to site as one-piece building components. However, occasionally they are delivered in sections and must be joined on site. Correct installation of these is critical to maintain the designed load paths.
Periphery roof areas
By Roger Shelton – 1 June 2008, Build 106
The area around the edge of a roof requires extra fixings to stop it lifting, but how much of the total roof area needs these extra fixings?
Gable end trusses
By In Ling Ng – 1 April 2017, Build 159
There have long been questions about whether a single gable end truss is suitable for fixing cladding to and, if so, what is the maximum height before a 2-ply gable end truss is required? For the answer, we look at the design of gable end trusses.
New-look Lintels and Beams Calculator
By Roger Shelton – 1 December 2014, Build 145
In a major overhaul of the BRANZ Lintels and Beams Calculator, an updated producer statement, additional drawings and more options for types of beams and fixings are now available.
Braced wall bottom plate to concrete slab connections
By Greg Burn – 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.
Maximum strength of house bracing walls
By Stuart Thurston – 1 February 2008, Build 104
A BRANZ research project has investigated load transfer in timber framed buildings – and found a number of potential weak spots.
Using the right stud height
By Roger Shelton – 1 June 2018, Build 166
NZS 3604:2011 Timber-framed buildings does not define stud length or height. This is creating some confusion, especially when continuous studs for chimneys or parapets pass intersecting framing. BRANZ has some advice.
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Issues (28)
- Build 183 : 1 April 2021 (1)
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- Build 141 Supplement : 1 April 2014 (1)
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