AS 1684
Australian Standard for residential timber-framed construction, providing span tables and bracing rules for Class 1 and Class 10 buildings up to two storeys.
Residential Timber-framed Construction, the deemed-to-satisfy standard called up by NCC Volume 2 for Class 1 (dwellings) and Class 10 (sheds, garages) buildings up to two storeys. It is published in four parts covering design criteria, non-cyclonic, simplified non-cyclonic, and cyclonic areas. AS 1684 contains span tables for studs, plates, joists, rafters, and lintels for MGP and F-grade timber, plus rules for tie-down, bracing, and connection design. Designers can use AS 1684 directly without engineering calculations provided the building falls within its scope. For buyers, AS 1684 dictates the section size and grade for each member, so substitutions (e.g. dropping from MGP12 to MGP10) require span-table verification. Always cross-check the framing schedule against the relevant part of the standard.
Values and references on this page are indicative and drawn from common industry sources. Always verify the current AS/NZS standard, manufacturer data sheet or NIAA policy publication before relying on figures for design, specification or compliance work.
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