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Dragon ties revisited

By Roger Shelton 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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Tolerances tables

By Bruce Sedcole 1 June 2021, Build 184

In Build 156 Tolerances tables, we outlined some of the allowable construction tolerances for a quality result. We have now revisited this information and added some more for plasterboard and fibrous plaster, an area that can cause disagreements between contractors and clients.

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Sizing of top plates

By Tom Edhouse 1 October 2014, Build 144

A couple of errors in the column headings for NZS 3604:2011 Timber-framed buildings Table 8.16 have left some scratching their heads. Here’s some pointers to get users back on track.

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Moving beyond the bridge

By Verney Ryan 1 February 2021, Build 182

Research has found the percentage of timber framing in walls of new houses is much higher than assumed in compliance calculations. This means more thermal bridging, less insulation and lower thermal performance. Why is this and what can be done?

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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.

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Within tolerance

By Trevor Pringle 1 August 2016, Build 155, Feature article

Construction can’t be perfect all the time, so allowable tolerances have been defined to maintain quality. Here are some of the key tolerances you should work to in order to ensure quality buildings.

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Selecting timber framing

By Anna Smith 1 October 2006, Build 96

A designer needs to select the right timber for their design. This means choosing the correct level of treatment for the situation and the right grade for the spans and loadings nominated.

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