Various activities are underway in the building industry in response to weathertightness problems and some steps have now been taken. One is the recent revision of the Acceptable Solution for B2 Durability. A key issue in this revision has been setting minimum levels of timber treatment for selected parts of a building through reference to the (also) revised standard NZS 3602. This feature discusses some important consequences of these revisions.
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NZS 3604:2011 Timber-framed buildings sets out how to size rafters in table 10.1. The BRANZ technical helpline has received queries on doing this, so let’s step through some examples.
Verge overhangs are the areas of a timber-framed roof that are most vulnerable to wind damage, so it’s important to get them right.
The BRANZ Helpline regularly receives enquiries about when strapping must be used to tie the timber framing together. These tips should point you in the right direction.
Although steel framing in domestic construction has only a small market share, there are signs it may be on the increase. Since steel is a good conductor, builders need to be aware of potential pitfalls, such as thermal bridges and condensation.
The treated timber framing system that came into effect on 4 April this year allows a single hazard class, H1.2, to be used for all enclosed radiata pine and Douglas fir framing.
Prone to earthquakes and with abundant native timber, New Zealand was quick to adopt timber as a building cladding. It could even replicate stone with design elements such as quoins.
Quick to go up and slow to come down, timber framing enabled New Zealand to house its rapidly growing population in the early 1900s and has proved to be an enduring building system.
Exciting new possibilities for cross-laminated timber were a hot topic at last year’s world conference in timber engineering. Easy to erect, cost-effective and ideal for low- to mid-rise building, will it work in NZ?