Changes to the New Zealand Timber Design Standard – NZS3603:1993 Amendment 4.

NZS 3603 is the standard for the design of timber structures. It is used for the design of large timber structures, as well as being the basis for residential timber-framed buildings (NZS3604). It contains design stresses and methods for specific design.

An amendment (No 4) to NZS 3603 has just been released. This amendment incorporates changes to timber grades and their respective design stresses. It reflects changes to the timber resource in NZ, as well as the methods used to grade that timber.

The issues which have been addressed in the amendment include: