Fixings are the Achilles heel of timber buildings. Wind and other damaging hazards find the weakest link in the building, and failure will start there. This is almost always the fixings.
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Roof failures in high winds are unfortunately too common in timber-framed buildings, but get the connections right, and the roof should stay put.
The citing of AS/NZS 1170 Structural design actions in December 2008 introduced a number of changes to snow loading on buildings, and these have resulted in changes in NZS 3604.
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.
There seems to be some confusion around selecting lintels and deciding if uplift fixings are required using NZS 3604:2011 Timber-framed buildings Table 8.14, so grab your copy of NZS 3604 and work through the steps.
NZS 3604:2011 will be cited later this year, so you need to know what the changes are.
BRANZ regularly receives queries about hold-down fixings to the exterior walls of timber-framed buildings. This overview sets out the fixing requirements in NZS 3604:2011 for resistance to uplift for the various framing members.
The BRANZ helpline often receives questions about veranda design and construction. Here, we answer some of those questions.
While the bracing requirements in NZS 3604:2011 Timber-framed buildings suit most buildings, the distribution rules of clause 5.4.7 are too lenient for some complex designs. During earthquakes, some Building Code-compliant buildings may move or flex, causing extensive damage. BRANZ research found which buildings are affected and suggests changes.