Sizing rafters
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.
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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.
When a brace wall must be connected through the ceiling framing, there are a number of options for how to do this correctly.
The correct fixings are needed at the various junctions of a timber-framed building structure to resist uplift in windy conditions. In this article, we summarise where to find them in NZS 3604:2011 and what is required.
There are rules around substituting studs with different sizes, but calls to the BRANZ
Helpline suggest some people are finding these confusing.
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.
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.
How to use NZS 3604:2011 Table 8.18 remains a common question to the BRANZ helpline, even though it’s been touched on in several Build articles. This time, we work through it step by step.
The BRANZ Technical Helpline often receives queries for designing and building suspended timber floors and dealing with uplift. Nine of the most common questions are answered here.
Drained cavities to external walls need to be constructed correctly to keep wind-driven rain and vermin out and allow drainage and ventilation. One overlooked area is when external walls are supported on cantilevered floor joists.