Messmate, Gympie

Gympie messmate is a strong, versatile and popular timber used for a wide range of interior and exterior applications.

Other Names

Queensland Messmate, Dead Finish, Yellow Messmate

Botanical Name

Eucalyptus cloeziana

Common Form
Sawn
Species Type

Gympie messmate is a large native hardwood harvested commercially in Queensland. Magnificent examples of the species can be found around the Gympie area (hence the name), where it is noted for its excellent stem form and vigour, reaching up to approx 60 metres in height and two metres wide. It is also widely scattered from Tambo to Mundaberra in the east to near Cooktown in Queensland's north, with isolated pockets occurring in between.

Gympie messmate features yellow-brown heartwood that is strong, hard and extremely durable. Its sapwood is noticeably paler in colour, ranging from white to grey-white. The grain is generally uniform, unfigured, with a fine to medium texture that can sometimes be shallowly interlocked. Bark is soft, flaky, and fibrous with distinctively tessellated fine or coarse longitudinal fissures and is often mistaken for the yellow bloodwoods, although there is no relation between these two species.

Plantation-grown Gympie messmate is readily available. This strong, versatile timber machines, turns, and dresses well and readily accepts paint, stains and polish.

This highly valuable tree species is used for heavy engineering construction, railway sleepers, mining timber, posts, poles and scantling. It is highly resistant to decay from ground contact or in damp, poorly ventilated conditions. These properties make messmate extremely useful for outdoor furniture, turning and joinery, as well as crafting keeling and framing components in vehicles and carriage building.

Gympie messmate is often used as sawn and round timbers for wharf and bridge construction, while unseasoned sawn timber is regularly employed for general house framing. Seasoned dressed timber is used for cladding, internal and external flooring, lining, joinery, fencing, landscaping and retaining walls. Most power poles in south east Queensland are created from Gympie messmate.

 

Shrinkage

Very Low Low Medium High Very High

Tangential :

6.00%

Radial :

3.40%

Unit Movement Tangential:

0.37%

Unit Movement Radial:

0.21%

Strength Group

Very High

High

Reasonably High

Medium High

Medium

Reasonably Low

Low

Very Low

Unseasoned:

S1

S2

S3

S4

S5

S6

S7

Seasoned:

SD1

SD2

SD3

SD4

SD5

SD6

SD7

SD8

Stress Grade

Structural
No. 1
Structural
No. 2
Structural
No. 3
Structural
No. 4
Structural
No. 5

Unseasoned:

F27

F17

F14

F11

F8

Seasoned:

F27

F22

F17

F14

F11

Density per Standard

Seasoned:

955kg/m3

Unseasoned:

Joint Group

Very High

High

Reasonably High

Medium

Low

Very Low

Unseasoned:

J1

J2

J3

J4

J5

J6

Seasoned:

JD1

JD2

JD3

JD4

JD5

JD6

Colour

  White, yellow, pale straw to light brown Pink to pink brown Light to dark red Brown, chocolate, mottled or streaky
   

Mechanical Properties

Modulus of Rupture - Unseasoned:

94

Modulus of Rupture - Seasoned:

137

Modulus of Elasticity - Unseasoned:

14

Modulus of Elasticity - Seasoned:

17

Maximum Crushing Strength - Unseasoned:

49

Maximum Crushing Strength - Seasoned:

73

Impact - Unseasoned:

21

Impact - Seasoned:

13

Toughness - Unseasoned:

Medium - 15 - 24 Nm

Toughness - Seasoned:

Medium - 15 - 24 Nm

Hardness - Unseasoned:

7.7

Hardness - Seasoned:

12

Durability

Low Moderate Reasonably High High
(0 - 5 yrs) (5 - 15 yrs) (15 - 25 yrs) (more than 25 yrs)

In-Ground:

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

Above ground:

(0 - 20 yrs, usually < 5) (21 - 40 yrs) (41 - 64 yrs) (More than 60 yrs)

Marine Borer Resistance:

Lyctid Borer Susceptibility:

Not Susceptible

Lyctid Borer Susceptibility - Other:

Termite Resistance:

Resistant

Fire Properties

1 - non-combustible 2 - reasonably non-combustible 3 - slightly combustible 4 - combustible

Fire Properties Group
Number:

Group Number - Other:

3 if used on MDF or particleboard ≥12mm; veneer thickness 0.6-0.85mm

Average Specific Extinction Area:

<250

Bushfire Resistance:

BAL 12.5 and 19 – All AS3959 required applications
Appearance

Gympie messmate has yellowish-brown hued heartwood, its sapwood is noticeably paler in colour, ranging from white to grey-white. The grain is uniform, unfigured, with a fine to medium grain that is sometimes shallowly interlocked. Bark is soft, flaky and fibrous with distinctively tessellated fine or coarse longitudinal fissures, causing it to be confused with the unrelated yellow bloodwood.

Common Applications

Gympie messmate is valued for its versatility, strength and strong resistance to decay resulting from ground contact or constantly damp, poorly ventilated conditions. It is employed in a wide variety of heavy construction applications, including as sawn and round timbers for wharf and bridge construction, railway sleepers, mining timber, posts, poles and scantling. Its water resistant properties make it ideal for crafting keeling and framing components in vehicles and carriage building.

The unseasoned raw timber is often used for general house framing, while seasoned timber is employed by the construction industry for cladding, internal and external flooring, lining, joinery, fencing, landscaping and retaining walls. It also makes excellent outdoor furniture.

Workability

This strong, versatile timber machines, turns and dresses well and readily accepts paint, stains, and polish. There are no issues with fixing standard fittings and fastenings. When gluing, machining and surface preparation should be done in advance, like most high-density species. The timber can be satisfactorily seasoned using conventional air and kiln methods. Preservatives readily impregnate the sapwood. 

Origin of timber
QLD
Readily Available
QLD
Gympie messmate’s availability is limited to its state of origin - Queensland.
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Joinery

Timber joinery offers a classic, stylish touch to any interior or exterior space.
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Panelling, Interior

Timber panelling creates interiors as warm as they are stylish. Commonly using an MDF or plywood substrate, internal timber paneling is natural and versatile and comes as either solid natural timber panels or as sheets of engineered wood products
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Fencing

When it comes to fencing, timber is a natural choice. A material that is durable, strong and reliable it compliments almost every outdoor landscape and environment. Clear specification, detailed installation and appropriate maintenance will ensure a timber fence provides a natural and lasting property boundary and back drop for years to come.
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Structural Timber Poles

Timber poles are utilised in structural construction to provide support for gravity loads and resistance against lateral forces. Not only serving a structural function, timber poles provide many aesthetic benefits, with their use in construction often complementing architectural designs aimed at harmonisation with the natural environment.

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