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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E2/AS3, the third Acceptable Solution for Building Code clause E2 External moisture, has been revised. We look at some of the main changes.
Steel is used in many buildings, but for which components in which types of buildings, and what is the outlook for its future use?
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.
Steel framing is highly conductive to heat, so thermal breaks must be incorporated to prevent heat loss. But what is a thermal break, and where are they required when using steel framing?
To simplify the consenting process for structural insulated panels (SIPs), we need to know how they perform locally. A BRANZ research project is helping by examining SIP durability, earthquake and fire performance.
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.
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