The objective of this Standard, in the AS 1684 series, is to provide the building industry with procedures that can be used to determine building practice, to design or check construction details, and to determine member sizes, and bracing and fixing requirements, for timber-framed constructions in non-cyclonic areas.

The objectives of this revision are to —

(a) make editorial revisions and some technical changes to correct mistakes and clarify the application of the document;
(b) amend Section 5: Flooring and Decking to remove ambiguities and to reflect current research and experience which is able to provide for a quieter and more robust floor;
(c) amend Table 9.25 of AS1684.2 to include suitable nail and screw fixings for 45mm thick roof battens;
(d) reversing the values in Table 8.18 to represent JD5 capacities, while continuing to recognise JD4 capacities (an increase the values by 12.5%) where this is known;
(e) amend AS 1684.2 and AS 1684.3 to provide a suitable deemed-to-satisfy detail for metal tie down to timber connection that is compatible with AS 4773; and
(f) relaxing the notching requirements for non-load bearing walls.

This is Part 2 of a series of Standards for residential timber-framed construction. The Standards in the series are as follows:

AS 1684.1, Residential timber-framed construction, Part 1: Design criteria
AS 1684.2, Residential timber-framed construction, Part 2: Non-cyclonic areas
AS 1684.3, Residential timber-framed construction, Part 3: Cyclonic areas
AS 1684.4, Residential timber-framed construction, Part 4: Simplified — Non-cyclonic areas

While AS 1720.3-2016 Design Criteria for timber-framed residential building supersedes AS 1684.1:1999, notwithstanding this, AS 1684.1:1999 is not withdrawn as a standard, and remains relevant as the basis for Parts 2-4. AS 1684.4:2010 (derived from AS 1684.2:2010) remains current.

This Standard refers to Supplements that are an integral part of this Standard. Statements expressed in mandatory terms in Notes to the Span Tables in the Supplements are deemed to be requirements of this Standard.

Notes to the text contain information and guidance. They are not an integral part of the Standard.

First published as AS O56-1946. Second edition 1948. Revised and redesignated as AS CA38-1971. Revised and redesignated as AS 1684-1975. Third edition 1992. Revised and redesignated in part as AS 1684.2-1999. Previous edition AS 1684.2-2010.