Elaeocarpus ruminatus, E. coorangooloo. Family: Elaeocarpaceae
- Medium-size hardwood with buttressed, straight trunk.
- Bark is grey or brownish.
- Bark is slightly longitudinally wrinkled with brown-coloured pustules in the wrinkles.
- E. ruminatus occurs in rainforest from Mackay to Atherton.
- E. coorangooloo occurs only in dry rainforests in North Queensland.
- Heartwood is pale brown, may be tinged grey, and may have darker stripes.
- Sapwood is creamy white.
- Often interlocked, producing a ribbon figure (pattern) on the radial surface.
- Texture is moderately fine and even.
- General building framing.
- Furniture and cabinet work.
- Planking of racing skiffs and racing sculls.
- Historically used for light aircraft parts.
- Density: E. ruminatus—560kg/m3 and E. coorangaloo—610kg/m3 at 12% moisture content; about 1.6 to 1.8m3 of seasoned sawn timber per tonne.
- Strength groups: E. ruminatus and E. coorangaloo (S6) unseasoned; (SD7) seasoned.
- Stress grades: E. ruminatus and E. coorangaloo F4, F5, F7, F8 (unseasoned) F5, F7, F8, F11 (seasoned), when visually stress-graded according to AS 2082—2000, Timber—Hardwood—Visually stress-graded for structural purposes.
- Joint groups: Elaeocarpus ruminatus JD4 seasoned, E. coorangooloo JD3 seasoned.
- Shrinkage to 12% MC: not available.
- Unit shrinkage: not available.
- Durability above-ground: Class 4 (life expectancy less than 7 years).
- Durability in-ground: Class 4 (life expectancy less than 5 years).
- Lyctine susceptibility: untreated sapwood susceptible to lyctine borer attack.
- Termite resistance: not resistant.
- Preservation: sapwood impregnates with preservative.
- Seasoning: seasons well.
- Hardness: E. ruminatus is soft (rated 5 on a 6-class scale) and E. coorangooloo is firm (rated 4 on a 6-class scale) to indent and work with hand tools.
- Machining: easy to work, cuts cleanly and dresses with a fine finish.
- Fixing: holds nails and screws well.
- Gluing: glues well.
- Finishing: readily accepts paint, stain and polish.
- Sapwood: creamy-white.
- Heartwood: pale straw colour with grey streaks.
- Texture: moderately fine and uniform, straight grain, soft to cut.
- Vessels: medium, radial multiples of 2–4 cells with a few solitary, uniform distribution.
- Parenchyma (soft tissue): visible only as fine terminal bands.
- Rays: 2 distinct widths—moderate and fine.
- Burning splinter test: wood burns to a grey-buff ash.
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