Timber specification resources for architects and specifiers.
Span tables, standards, data sheets and the certification behind them — everything needed to write Auswood into a project.
Auswood publishes certified span data and the standards its structural range is manufactured and designed to, so a specification can be written without a phone call first — and a technical rep is there for the calls that still need one.
Span tables and design data
Rafter and lintel spans for enviroBeam LVL, single and double span, internal and external openings, with the load assumptions each table is built on. Certified by TGA Engineers as NCC Evidence of Suitability, and published in full on the Structural Timber page.
The tables cover Class 1 and Class 10 buildings, single and two storey, to a maximum building width of 16 metres excluding eaves, wall height to 3 metres and roof pitch to 35 degrees.
Rafters, lintels and the full standards table, on Structural Timber.
View Span TablesScope: Class 1 and Class 10 buildings, single and two storey. Max width 16 m. Wall height to 3 m. Roof pitch to 35 degrees. Certified by TGA Engineers.
Standards and compliance
The standards Auswood’s structural range is manufactured and designed to, and the independent certification behind the span tables.
| Standard | Applies to |
|---|---|
| AS/NZS 4357.0:2005 (R2016) | Product specification for structural LVL |
| AS 1720.1:2010 | Timber structures, design methods |
| AS 1720.3:2016 | Design criteria, timber framed residential |
| AS 1684.2 | Residential timber framed construction, non-cyclonic |
| AS/NZS 1577 | Scaffold plank only |
| AS 3660.1 | Termite management, H2S treatment |
National Construction Code
NCC Performance Requirement H1P1 is satisfied for enviroBeam LVL designed and constructed in accordance with AS 1720.1.
Engineering certification
Span tables prepared in Spanman by Spanware Pty Ltd and certified as NCC Evidence of Suitability by TGA Engineers.
Chain of custody
Chain of custody documentation is available for Auswood’s certified timber products on request.
Data sheets and technical documentation
Product data sheets and technical documentation for Auswood’s structural range are available through Resources, or direct from a technical rep for anything not yet published.
Browse what’s published in Resources, or request the specification kit for a project-specific data pack.
Glulam for exposed and feature applications
Where the beam will be seen — an exposed portal frame, a feature ceiling structure — enviroGL glulam reads as timber rather than as engineering. Sawn timber laminations glued face to face, able to curve where LVL cannot.
See the full structural range, including enviroGL, on Structural Timber.
View Structural TimberTalk to a technical rep about a specification.
For anything the published span tables and standards table don’t answer, a technical rep can talk it through directly.
Frequently asked questions
It depends on the application rather than a single winner. LVL’s peeled-veneer construction generally gives higher, more consistent bending strength for covered structural members. Glulam trades some of that for the ability to curve and to be left exposed as a feature element.
Span depends on section size, load and application, and needs to be engineered per project rather than read off a generic figure. Talk to a technical rep with your load case for enviroGL-specific guidance.
It can be left exposed and read as timber rather than as engineering, and it can curve where a solid or LVL member cannot — which opens up feature structures that a hidden structural frame doesn’t.
Cost is the main one — a laminated, often visual-grade member costs more than a covered LVL equivalent. Lead time can also run longer than stock LVL, particularly for curved or long-span members, so it needs to go into the program early.
Section sizes for enviroGL are set per the current spec sheet — ask a technical rep for the current range rather than relying on a generic figure, since glulam sizing is often project-specific.
Used within its specification, glulam is a permanent structural product for the life of the building, the same as any other engineered structural member designed to AS 1720.1.
Not inherently — exterior use needs a specific exterior-rated adhesive and finish system, which is a different specification to a standard interior glulam member. Confirm exposure requirements with a technical rep before specifying it externally.
Auswood’s LVL is specified for dry interior use only, below 18% moisture content in service. Sustained wetting is outside its design envelope — full limits are on the Structural Timber page.
No — it is a dry-use product. Exterior and weather-facing structural members need a different specification. Talk to a technical rep about the right product for exposed applications.
AS/NZS 4357.0, AS 1720.1, AS 1720.3, AS 1684.2, AS/NZS 1577 and AS 3660.1, each applying to a different part of the range. Full table above.
Certified LVL span tables are on Structural Timber. Further data sheets and technical documentation are in Resources.
Ask a technical rep about what’s currently available for your project — CAD and BIM resourcing varies by product family.
Chain of custody documentation is available for Auswood’s certified timber products on request — ask a technical rep for the documentation your project needs.
Yes — contact Auswood and ask for a technical rep, or send the project details through with a specification request.
Specify with confidence.
Request the specification kit for your project, or open the certified span tables directly.