Spotted Gum Timber Technical Information
Spotted Gum (Eucalyptus maculata)
Spotted Gum is one of Australia’s premium native hardwoods with a striking appearance and a high degree of natural durability and strength, making it an ideal timber for a variety of structural, exterior and interior applications. Architects and designers throughout the world value Spotted Gum timbers for their back-sawn grain structure, attractive markings and vibrant colour palette. The colour varies with this specie from pale grey browns and soft creams to a rich chocolate brown. A very tough timber, its frequent wavy grain can produce an attractive and highly valued fiddleback effect. The wood has a slightly greasy feel, a characteristic that aids machining and boring. Spotted Gum components that are 18mm thick or greater do not require fire retardant treatment for use in construction in bush-fire prone areas.
Spotted Gum is used in engineering applications such as wharf and bridge construction, railway sleepers, cross-arms and mining timbers. It is suitable for a range of building applications, such as posts and poles, framing, flooring, lining, decking and cladding.
- Dry Density: 950 kg/m³
- Janka Dry Hardness: 11 kN
The Janka rating is the hardness level given to each species. The higher the number, the greater the hardness.
The natural colour variation within a timber species is normal and one of its most appealing characteristics.
|Janka (Hardness) Rating – Dry||11|
|Natural Durability Class||In-ground contact||2|
|Outside above ground contact||1|
|Density (kg/m3)https://www.modinex.com.au/wp-content/uploads/2021/09/Modinex_Western-Red-Cedar_Test_May-18.pdf||Unseasoned (Green)||1150|
|Strength Group||Unseasoned (Green)||S2|
|Joint Group||Unseasoned (Green)||J1|
|Fire Indices||Spread-of-Flame Index||3|
|Critical Radiant Flux||>2.2 and <4.5|
|Smoke Development Rate||<750|
|Naturally bushfire-resisting Timber||Yes|
|Tangential Shrinkage %||6.1|
|Toughness (Nm)||Naturally Unseasoned (Green)||20|
|Naturally Termite Resistant to AS3660R = Resistant
NR = Non resistant
|Naturally Lyctus SusceptibleS = Susceptible
NS = Non susceptible