Bracing ratings
Recent BRANZ testing has quantified the bracing ratings of some common older generic bracing systems. These ratings will be useful during repairs or renovations of older buildings.
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Recent BRANZ testing has quantified the bracing ratings of some common older generic bracing systems. These ratings will be useful during repairs or renovations of older buildings.
A question frequently asked by readers is how do you compensate for the bracing that is removed when demolishing an internal wall during a renovation or refurbishment? We have some advice.
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.
Let-in plywood bracing has a long history of use. Some designers and manufacturers specify it, but some councils don’t permit it. BRANZ has found it doesn’t seem to affect structural integrity and suggests ways to resolve the uncertainty.
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.
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.