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Myrtle

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Myrtle is a striking wood with rich red, brown, and almost orange tones and makes an excellent veneer and finishing timber.

The Timber

It is believed the richness of colour comes from the quality of the soil it grows in. The deepest red myrtle comes from highly fertile soils on basalt. The colour is vibrant, combining subtle variations in tone with the texture and sheen of wavy and fiddleback features to produce a surface alive with character and individuality. While a pale and pink myrtle resource is available, commercial production concentrates on the deeper red variety. It is a close grained species with well defined annual rings but with little latewood.

Myrtle's fine aesthetic qualities are matched by its working properties. It is particularly easy to work and makes excellent veneer.

Taking a deep lustre when polished, Myrtle is prized by architects and furniture makers alike. It is used as a solid or veneer in high quality furniture, joinery, cabinet making and feature panelling in homes and offices, or as a striking finishing timber for cornices, architraves and skirting.

It has further applications for craft workers. Myrtle turns well and traditionally has been used for spindle turning and bowls. Craft workers particularly favour burls and knotty wood.

The Resource

Myrtle is a predominant species in Tasmania’s cool temperate rainforests. In wet eucalypt forests, Myrtle grows as an understorey tree, and as a small shrub at higher altitudes when the site is exposed to wind. Achieving its best growth in highly organic soils, Myrtle in moist and sheltered conditions will flourish from sea level to 700m, though it can achieve significant growth rates through to 1570m.

Depending on available rainfall and humidity, Myrtle can be fairly fast growing. In optimum growing conditions, it is capable of regenerating continuously and forests can contain Myrtle trees ranging from 1 to 500 years old.

Myrtle is found in the north-west and west of the state, though small communities thrive on the Tasman Peninsula and South Bruny Island. 82% of total forest types containing Myrtle are in reserves.

The Tree

Myrtle is a tall evergreen tree, reaching to 30-40m in height and can achieve a diameter of 1.5–2.5m. Their fine-textured leaves and dark green crown can give Myrtle trees a ragged appearance.

Myrtle flowers in spring, with very small light flowers growing on the new shoots at ends of branches. Female flowers grow in groups of three, just above the male flowers, which are either solitary or found occasionally in threes. ?Seeds are shed in late summer to early autumn. A parasitic fungus, Cyttaria gunii, often grows on Myrtle trees, causing round, dimpled orange fruit like protrusions.

New spring growth is red to bronze coloured, developing into a glossy green leaf. As they age, the leaves become thick, stiff and develop a dark green shade. Myrtle’s leaves are triangular in shape. They grow to 1-1.5cm and have a coarse blunt-tooth edge.

Myrtle bark is brown, scaly and slightly fibrous, and does not shed from the trunk.

Myrtle Technical Details

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Properties

Sizes
Dressed seasoned timber 40 to 300 mm wide by 12 to 40 mm thick. Undressed seasoned timber 25 to 300mm wide by 25 to 50 mm thick. Lengths up to 4500 mm long are available, with the bulk of production between 2400 and 3000 mm long.
Grain
Grain is mainly straight and occasionally wavy with clearly visible growth rings.
Texture
Fine, uniform and smooth.
Durability Description
Termite resistance of heartwood: Not resistant. Myrtle has good durability for decorative, architectural and structural applications internally but is not recommended for external use. The in-ground durability of heartwood is low. Refer to AS 5604-2005 Timber - Natural durability ratings.
Durability
In-ground: Class 4
Above-ground: Class 3
Movement - Shrinkage
Approx. 3% radial, 6.5% tangential before reconditioning; 2.5% radial and 4.5% tangential after reconditioning.
Density
Unseasoned: 1100 kg/cu m
Seasoned: 700 kg/cu m at 12% MC
Strength Group
Unseasoned: S4
Seasoned: SD5
Joint Group
Unseasoned: J3
Seasoned: JD3
Structural Grades
Most commonly available structural grade is number 3; F11 seasoned, F8 unseasoned.
Toughness (Izod)
Unseasoned: 12.0
Seasoned: 13.0
Hardness (Janka)
Unseasoned: 4.0
Seasoned: 5.9

Fire Hazard Properties

Fire hazard Properties: Flooring (AS ISO 9239.1)
Critial Radiant Heat Flux: 4.5 kW/m2 or greater
Smoke Development Rate: Less than 750 %-min
Fire Hazard Properties: Wall and Weiling Lining (AS/NZ 3837)
Material Group: 3
Average Extinction Area: Less than 250 m2/kg

General workability

Blunting
Moderate.
Sawing
Cuts very cleanly and accurately with standard blades.
Planing
Moderate feeding forces required. Surfaces very smooth and lustrous.
Moulding
Surfaces are true and clean, even end grain.
Boring
Easy to drill. Holes are clean and to size.
Rebating + Mortising
Very good results may be obtained with relative ease.
Nailing
Nails very well, material does not tend to split. Pre-drilling is often necessary in seasoned material. Nails hold well.
Gluing
Glues satisfactorily with most common adhesives.
Bending
An excellent bending timber. 25mm material bends well to a radius of 75mm.
Finishing
Readily worked to a smooth, lustrous surfaced. Most finishes adhere very well. Staining can be difficult.

Myrtle Environmental Details

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Resource
Native - Wet Eucalypt and Rainforest
Reserves
82% of the total Myrtle forest types are reserved.
Plantation
Not available
Certification
Available
Chain of custody
Available
Carbon storage
308 kg/cu m
R Values
.57 (100mm)
Appearance
Available
Structural
Not available
Availability
Myrtle's availability is rare, and the resource is limited by quotas or predominant reservation.

Myrtle Brochures

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Myrtle | Nothofagus cunninghamii

Myrtle is a striking wood with rich red, brown, and almost orange tones. Taking a deep lustre when polished, myrtle is prized by architects and furniture makers alike. Download

Myrtle Suppliers

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