Interactive lookup from AS 1684.4-2010 for residential timber-framed construction in non-cyclonic areas. Select a member type to find the required timber size for each stress grade.
Member Type
Timber Seasoning
Required Timber Sizes UnseasonedSeasoned
Notes & References
All timber member sizes are in millimetres (depth × breadth).
Sizes prefixed with 2/ or 3/ indicate vertically nail-laminated members (e.g., 2/90×35 = two 90×35 members laminated).
Dashes (—) indicate the member cannot span that distance or is not applicable.
Unseasoned grades: F5, F7, F8, F11, F14. Seasoned grades: F5, MGP10, MGP12, F17, F27 (or F8 for some wall members).
For allowable roof and floor load masses, see AS 1684.4 Clause 1.4.11.
Minimum bearing: 50 mm at end supports, 100 mm at internal supports of continuous spans.
Source: AS 1684.4-2010 (+A1) Residential Timber-Framed Construction — Simplified — Non-Cyclonic Areas.