Residential timber-framed construction standard revised

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Monday, 19 July 2010 00:00

The newly revised editions of AS 1684

Newly revised editions of AS 1684 are now available for purchase through timber.net.au. These updated standards are required reading for anyone in the built environment professions – most particularly because they feature significant modifications to span tables.

Notable revisions to the Standard include:

The incorporation of new structural design characteristic values for stress grades MGP 10, MGP 12 and MGP 15 via revisions to the relevant span tables;
Changes to the role, function and need for wall noggings;
Incorporation of generic building practices for engineered wood products (see Appendix J of AS 1684.2); and
Simplified and more efficient tie-down systems for high wind and cyclonic areas.

These revisions are largely a response to changes to the design characteristic values of MGP stress grades in AS 1720.1. The popularity of MGP timber framing makes these changes of paramount importance to the implementation of AS 1684.

Although the overall effect of these revisions should be minimal, builders must take care to comply with the span table changes. Checking the new span tables is, however, a simple task.

Copies of the revised Standard, released in June 2010, are now available from timber.net.au. TDA is able to offer a substantial discount on RRP for the AS 1684 standards to those who wish to purchase 5 or more copies.

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