Tasmanian Oak

Tasmanian Oak is the preferred hardwood for a wide range of applications; scantlings, panelling, flooring, glulam spans, veneers, plywood, furniture. Fibre for reconstituted board and the production of high-quality paper.

It works extremely well and produces an excellent finish. It can be used in all forms of construction as scantlings, panelling and flooring, and can be glue-laminated to cover long spans. Veneers, plywood and engineered products are also available. It is also a popular furniture timber, and eucalypt fibre is sought after for reconstituted board and production of high-quality paper.

Tasmanian Oak is light in colour, varying from straw to reddish brown with intermediate shades of cream to pink. It is recognised for its excellent staining qualities, which allow ready matching with other timbers, finishes or furnishings.

Tasmanian Oak Products & Applications

Quality assured Tasmanian Oak products are available from these suppliers:

The Tasmanian Timber Quality Assurance Program assesses nominated products for Australian Standards compliance through a quarterly mill audit. Buyers can trust that the guaranteed products from our suppliers come from a company that employs sustainable practices, holds Chain-of-Custody, and Responsible Wood accreditation.

Tasmanian Oak Properties

E.regnans, E.obliqua, E.delegatensis

For further information click tables marked  

Availability & Appearance
General Availability
Readily available and continuously harvested.
Appearance Grade
Available
Plantation
Not available
Structural Grade
Available
Veneer
Available (multiple thicknesses)
Sizes
Dressed seasoned timber 40 to 285mm wide by 12 to 40mm thick. Undressed seasoned timber 50 to 300mm wide by 19-50 mm thick. Lengths up to 5400mm long are available, with the bulk of production between 2700 and 4200mm long.
Colour
Straw to reddish brown with intermediate shades of cream to pink.
Grain
Grain is usually straight, open and even. Occasionally coarse-grained or fiddle backed. Growth rings are visible and usually conspicuous.
Texture
Uniform and smooth.
Density  
Unseasoned
Seasoned
Density (per standard)
1050 kg/m3
650 kg/m3
Durability  
Above-Ground
Class 3: 7-15 yrs
In-Ground
Class 4: 0-5 yrs
Susceptible to Lyctid Borer
Yes
Marine Borer Resistance
0-20 yrs
Termite Resistant
No
Environmental Details
Resource
Native - Wet Eucalypt and Dry Eucalypt
Reserves
35% of the total Tasmanian Oak forest types are reserved.
Certification
Available
Chain of Custody
Available
Carbon Storage
308 kg/m3
R Values
0.57 (100mm)
Fire Properties  
Average Specific Extinction Area
> 250 m2/kg
Bushfire Resistance
BAL-12.5
Critical Radiance Flux - Higher
> 2.2 < 4.5 kW/m2
Critical Radiance Flux - Lower
> 2.2 < 4.5 kW/m2
Smoke Development Rate
< 750% per min
EFH Ignitibility: 6
EFH Smoke-Develop Index: 3
EFH Spread-of-Flame Index: 5
Fire Properties Group Number: 2
Joint  
Unseasoned
Seasoned
Joint Group
J3
JD3
Mechanical Properties  
Unseasoned
Seasoned
Hardness (Janka)
4.2 kN
5.7 kN
Impact
14 J
21 J
Maximum Crushing Strength
30 MPa
63 MPa
Modulus of Elasticity (MOE)
13 GPa
17 GPa
Modulus of Rupture (MOR)
63 MPa
110 MPa
Toughness (IZOD)
15-24 Nm
15-24 Nm
Movement  
Radial
0.36% per 1% MC change
Tangential
0.23% per 1% MC change
Shrinkage  
Radial
3.5%
Tangential
6.5%
Stress  
Unseasoned
Seasoned
Common Structural Grades
Structural #3: F8
Structural #2: F17
Structural Grades
S1:F14, S2:F11, S3:F8, S4:F7, S5:F5
S1:F22, S2:F17, S3:F14, S4:F11, S5:F8
Strength  
Unseasoned
Seasoned
Strength Group
S3 & S4
SD3 & SD4
Workability
General Workability
Highly resilient and relatively easy to work.
Bending
A good to fair bending timber. 25mm material bends reasonably well to radius of 100mm.
Blunting
Moderate. Can be severe in dense material.
Boring
Easy to drill. Holes are usually clean and to size.
Finishing
Readily worked to a smooth, lustrous surface. Most finishes adhere very well. Stains very well.
Gluing
Glues satisfactorily with most common adhesives.
Moulding
Surfaces are true and clean, even-end grain. Holds edges well.
Nailing
Pre-drilling is often necessary in seasoned or denser material. Nails hold well.
Planing
Moderate feeding force is required. Surfaces very smooth and lustrous when working 'with' the grain.
Rebating + Mortising
Generally produces excellent results.
Sawing
Cuts fairly cleanly with moderate feeding force.
Turning
Turns well with sharp arrises.

Sources: Centre for Sustainable Architecture with Wood (CSAW), Wood Solutions

The Tasmanian Timber Expert Helpline is a free service operated by the Centre for Sustainable Architecture with Wood at the University of Tasmania; providing advice on choosing the right timber, obtaining quotes from suppliers, and troubleshooting problems.

Call the Helpline 1300 041 766

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