Bracing to internal walls hold down fixings to concrete slabs

Issue 50 – June 2013

The maximum rating of bracing elements in NZS 3604:2011 Timber-framed buildings for internal walls on concrete slabs is 150 BUs per metre. This typically requires a hold-down fixing at each end of the panel with a 15 kN characteristic strength. Some proprietary fixings may require a slab thickening under the wall to give sufficient concrete depth to insert the fixings into to achieve the required characteristic strength.

Check BRANZ Appraisals (concrete hold-down fasteners) for products that have been appraised. The Appraisal will give the embedment requirements for the kN rating of the fixing.

Summarised from BRANZ Guideline, May 2013.

 

Published in building.

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