Irregular bracing needs to change
BRANZ research suggests changes are needed to the bracing provisions in NZS 3604:2011 Timber-framed buildings to avoid the damage to irregularly shaped houses that occurred in the Canterbury earthquakes.
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BRANZ research suggests changes are needed to the bracing provisions in NZS 3604:2011 Timber-framed buildings to avoid the damage to irregularly shaped houses that occurred in the Canterbury earthquakes.
Light timber-framed houses on hills and those within the scope of NZS 3604 may share many structural design issues but their seismic bracing performance can be very different. A BRANZ research project looked at the seismic bracing design for houses on hillsides.
Changes are needed after houses with a mixture of NZS 3604:2011 wall bracing and specifically designed bracing performed poorly during the Canterbury earthquakes. BRANZ’s new design procedure for seismic bracing elements in new houses will help.
A BRANZ research project has investigated load transfer in timber framed buildings – and found a number of potential weak spots.
It can be difficult to understand the requirements for joints in top plates, but here are some pointers from NZS 3604:2011 for top plate connections.
Creating a compliant bracing distribution system can be a challenge in today’s open plan house designs. Even if you don’t design them, it is still important to understand how bracing works.