Stress Grading of Timber- Revision to Standards

Guy Cavanagh — Carter Holt Harvey Woodproducts

NZS 3603:1993 Timber Structures Standard has been amended. This standard is the head standard for timber design, whether specific design or its flow-on to the Acceptable Solution, NZS 3604. The document is therefore the basis for timber framed buildings in general and for the design of trusses and other components as well as for other timber design from garages to mu1ti-storey buildings. A new standard, NZS 3622, Verification of timber properties, has been created to complete the loop of performance based stress grading.

This article locates the revised 3603 in the suite of associated standards and explains how it addresses the use of stress graded timber.

TDJ 13-4

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