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Span Tables
Stress grades and timber sizes combine to determine the spanning ability of load carrying members. Span tables allow users to choose an appropriate size and stress grade to achieve spanning needs. For simple construction – such as domestic construction – this can be determined from span table supplements in AS1684.2 and AS1684.3. For multi-unit residential construction span tables can be down loaded from the National Timber Development Council web site www.timber.org.au. For decks, stairs, handrails and balustrades, refer to the application guides referenced in Section 5 of this document, to obtain specific span tables. For other load conditions spans can be determined from proprietary computer programs commonly used by timber producers.