Wall bracing panel hold-downs

When using a proprietary wall bracing system the installation of that bracing system must be in accordance with the manufacturer’s literature. Substitution of anchors or other hardware/components that are specified for the system is not permitted as they may not provide the same level of performance.

For example, bolts or other anchors may be labelled as complying with the requirements of clause 7.5.12.3 of NZS 3604:2011 Timber-framed buildings, but these requirements relate solely to bottom plate fixings for loads applied in plane, out of plane and for uplift. The uplift requirement for an external bottom plate in NZS 3604 is to resist a vertical load of 7 kN.

The specified bottom plate anchors of a bracing system are likely to be required to resist a vertical load of 12–15 kN – if a lesser bolt or anchor is used, it would seriously diminish the bracing rating of the element, and the bolt/anchor would need to be replaced. 

From BRANZ Guideline, May 2014

Published in building.