Spotted Gum Prefinished Flooring
Heartwood : Colour variable from light brown to dark red-brown often with lighter shades.
Texture : Open, often with interlocked grain; greasy to touch.
Colour : The heartwood ranges from light brown through to dark red-brown. Sapwood is usually white and up to 50 mm wide.
Grain : Moderately coarse textured and variable. Gum veins common. The presence of wavy grain can produce an attractive fiddleback figure.
Density : 1010 kg/m3 at 12% moisture content; approximately 1.0 m3 of seasoned sawn timber per tonne. The density of plantation-grown timber of C. citriodora subsp. variegata aged 11 and 41 years: 87% and 108% mature timber density. C. citriodora subsp. citriodora aged 3 years: 71% mature timber density.
Shrinkage to 12% MC : (The shrinkage values apply to C. citriodora subsp. variegata). Tangential 6.1%, radial 4.3%. Plantation-grown (41 years) : tangential 5.8%, radial 3.4%.
Unit shrinkage : Tangential 0.4%, radial 0.3% (natural and plantation grown).
Durability above-ground : Class 1 – life expectancy over 40 years.
Durability in-ground : Class 2 – life expectancy 15 to 25 years.
Lyctine susceptibility : Untreated wood susceptible to lyctid borer attack.
Termite resistance : Resistant.
Preservation : Sapwood readily accepts preservative impregnation but penetration of heartwood is negligible, using currently available commercial processes.
Machining : Machines well due to its natural greasiness.
Fixing : No difficulty has been experienced with the use of standard fittings and fastenings.
Decorative : Internal fine furniture, outdoor furniture, turnery, joinery, parquetry.
Others : Tool handles, boat building (keel and framing components, planking, decking), coach, vehicle and carriage building, agricultural machinery, sporting goods (baseball bats, croquet mallets, spring and diving boards, parallel bars) and bent work. It has been used for butcher’s blocks, meat skewers, mallet heads, ladder rungs, wheel spokes, wine casks and broom handles. Spotted gum is the main Australian species for tool handles which are subjected to high impact forces, such as axe handles.