Dysoxylum fraseranum. Family: Meliaceae
- Medium-sized tree growing to 40m high.
- Stem grows more than 1m diameter.
- Stem is often flanged at the base but not prominently buttressed.
- Bark is light brown, scaly, and sheds in oblong flakes.
- Crown is usually dense and rounded with dark green, shiny foliage.
- Found scattered along the east coast from Wyong, New South Wales, to southern Queensland.
- In Queensland, mainly in the ranges around Killarney, Tamborine Mountain and the Mistake Ranges.
- Sawn timber is not readily available.
- Truewood ranges from red-brown to dark red.
- Sapwood ranges from light brown to cream.
- Moderately close, often interlocked.
- Texture is uniform.
- Soft tissue (parenchyma) gives a slight figure (pattern) to tangential surfaces.
- Construction: past use in sawn timber in general house framing, flooring, moulding and joinery but rarely used in these applications now.
- Decorative: panelling, furniture, plywood, shop and office fixtures, joinery, turnery, carving, inlay work.
- Others: past use for wine casks and brush stocks.
- Density: 705kg/m3 at 12% moisture content; about 1.4m3 of seasoned sawn timber per tonne.
- Strength groups: S5 unseasoned, SD5 seasoned.
- Stress grades: F5, F7, F8, F11 (unseasoned); F8, F11, F14, F17 (seasoned) when visually stress-graded according to AS 2082—2000: Timber—Hardwood—Visually stress-graded hardwoods for structural purposes.
- Joint groups: J2 unseasoned, JD3 seasoned.
- Shrinkage to 12% MC: 4.3% (tangential), 2.5% (radial).
- Unit shrinkage: 0.29% (tangential), 0.18% (radial)—these values apply to timber reconditioned after seasoning.
- Durability above-ground: Class 3 (life expectancy 7–15 years).
- Durability in-ground: Class 3 (life expectancy 5–15 years).
- Lyctine susceptibility: untreated sapwood is susceptible to lyctid borer attack.
- Termite resistance: not resistant.
- Preservation: sapwood readily impregnates with preservative, but penetration of heartwood is negligible using currently available commercial processes.
- Seasoning: satisfactorily dries using conventional air and kiln seasoning.
- Hardness: moderately hard (rated 3 on a 6-class scale) to indent work with hand tools.
- Machining: machines and turns well due to a natural oiliness of the wood.
- Fixing: no difficulty using standard fittings and fastenings.
- Gluing: satisfactorily bonds using standard procedures.
- Finishing: readily accepts paint, stain and polish; however, occasional pieces develop beads of free aromatic oil that stain the wood and produce a dull blotchy bloom under the polished surface—to overcome this problem avoid using timber with freshly dressed surfaces or, if staining has occurred, sponge the surface with alcohol.
- Sapwood: light brown to cream.
- Heartwood: red-brown, may have small dark oily patches on longitudinal surfaces.
- Texture: uniform, grain often interlocked.
- Growth rings: absent.
- Vessels: medium; uniformly distributed, mostly in short radial multiples but some solitary; obvious vessel lines; dark red vessel contents are common.
- Parenchyma: abundant in regularly spaced apotracheal bands, slightly lighter in colour than the background—on dressed tangential surfaces these parenchyma bands give rise to an attractive figure (pattern).
- Rays: fine, visible with a lens.
- Burning splinter test: produces a full white ash. This, together with the distinctive odour, distinguishes the species from the very similar, and closely related timber, miva mahogany, which burns to a charcoal.
- Odour: freshly cut wood has a distinctive aromatic odour.
Research and resources
- Boland, DJ, Brooker, MIH, Chippendale, GM, Hall, N, Hyland, BPM, Johnston, RD, Kleinig, DA and Turner, JD 2006, Forest trees of Australia, 5th ed., CSIRO Publishing, Collingwood, Australia.
- Bootle, K 2005, Wood in Australia: Types, properties and uses, 2nd ed., McGraw-Hill, Sydney.
- Ilic, J 1991, CSIRO atlas of hardwoods, Crawford House Press, Bathurst, Australia.
- Queensland Government, DAF 2018, Construction timbers in Queensland: Properties and specifications for satisfactory performance of construction timbers in Queensland. Class 1 and Class 10 buildings, Books 1 & 2, Department of Agriculture and Fisheries, Brisbane.
- Standards Australia, 2000, AS 2082—2000: Timber—Hardwood—Visually stress-graded for structural purposes, Standards Australia International, Strathfield, NSW.
- Last reviewed: 12 Dec 2018
- Last updated: 12 Dec 2018