Key Sections
Using hardwood & cypress
Designing for Appearance
Designing for Structural Strength
Structural Properties
Sizes and Availability
Span Tables
Timber Joints
Insulating Against Fire
Check Structural Selection
Designing for Durability
Formalising specification
Related Documents
Domestic decks
Expressed hardwood structures
Timber flooring
Non-domestic decks
Joinery, furniture and fit-out
Internal lining boards
Piles and poles
Stairs, handrails and balustrades
For Printing
Technical & Detailing Guide (PDF)

Home > Technical & Detailing Guide > Designing for Structural Strength > Span Tables

Designing for Structural Strength

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 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.