Description

Once sourced from old growth forests and displaying its famous deep dark reds and browns, these areas are now protected. In their place, sustainably managed new growth forests are producing lighter more delicate hues, perfect for a contemporary look with a distinctive design accent.

Jarrah has a history of use in engineering applications such as wharf and bridge construction, railway sleepers, cross-arms, piles, and for road bases. Its structural applications include posts and poles, framing, flooring, lining, decking and cladding.

A highly versatile timber, jarrah can also be used for woodturning, making it useful in the manufacture of high quality indoor furniture and weather resistant outdoor furniture that stands the test of time. The wood is also prized by luthiers for creating guitar and banjo necks.

Jarrah is easiest to work when it is green. Once seasoned, it is relatively easy to work, despite its density, if tools are maintained in sharp condition. Jarrah timber can be machined and turned easily. When using it in a planer, the blade must be set to 15 degrees to give the best surface quality. It can be glued and satisfactorily steam bent, but care must be taken when using nails, due to the density. Jarrah timbers readily accept paint, stain and polish.

Workability

Botanical Name: Eucalyptus marginata

Preferred Common Name: Jarrah

Species Type: Hardwood

ShrinkageVery low Low Medium High Very High

Tangenital 7.40%

Radial 4.80%

Unit Movement Tangenital 0.30%

Unit Movement Radial 0.24%

Medium High

Unseasoned S4

Seasoned SD4

Strength Group

Structural No. 1

Structural No. 2

Structural No. 3

Structural No. 4

Structural No. 5

Unseasoned F14 F11 F8 F7 F5

Tangenital F22 F17 F14 F11 F8

Stress Grade

Seasoned 820kg/m3

Unseasoned 1100kg/m3

Density Per Standard

Joint Group High

Unseasoned J2

Seasoned JD2

Mechanical PropertiesModulus of Rupture - Unseasoned 68

Modulus of Rupture - Seasoned 112

Modulus of Elasticity - Unseasoned 10

Modulus of Elasticity - Seasoned 13

Maximum Crushing Strength - Unseasoned 36

Maximum Crushing Strength - Seasoned 61

Impact - Unseasoned 13

Impact - Seasoned 10

Toughness - Unseasoned Low - up to 15 Nm

Toughness - Seasoned Low - up to 15 Nm

Hardness - Unseasoned 5.7

Hardness - Seasoned 8.5

DurabilityLow Moderate Reasonably

High

(0 - 5 yrs) (5 - 15 yrs) (15 - 25 yrs)

In-Ground

(0 - 7 yrs) (7 - 15 yrs) (15 - 40 yrs)

Above ground

(0 - 20 yrs) (21 - 40 yrs) (41 - 64 yrs)

Marine Borer Resistance

Structural No. 1

Structural No. 2

Structural No. 3

Structural No. 4

Structural No. 5

Unseasoned F14 F11 F8 F7 F5

Tangenital F22 F17 F14 F11 F8

Stress Grade

Lyctid Borer Susceptibility Susceptible

Termite Resistance Resistant

EFH Ignitability 13

EFH Spread-of-Flame Index 3

EFH Smoke-Developed Index 2

Critical Radiance Flux - Lower > 2.2 and < 4.5

Critical Radiance Flux - Higher > 4.5

Smoke Development Rate < 750

Fire Properties Group Number 3 - Slightly Combustible

Average Specific Extinction Area < 250

Bushfire ResistanceBAL 12.5 and 19 - All AS3959 required

applications, BAL 29 - Decking (in conjunction with non-combustible wall

cladding and enclosed subfloor).

Fire Properties

Address:Forest Industries Federation (WA) IncUnit 1, Abridge House5 Turner AveBentley WA 6102

Email: newjarrah@fifwa.asn.au

Telephone:Within Australia 08 9472 3055Outside Australia 61 8 94723055

To find out more about New Jarrah and its applications, please contact FIFWA.

Contact Us

www.newjarrah.com.au