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Brush boxBrush box
Brush box (Tristania sp.)

Family: Myrtaceae

Common names: Brush box, Kanuka, Keruntum, Malabayabas, Melaban, Meraban, Pelawan, Rong Leang, Selunchor, Selunsur, Swamp box

Distributed in: Australia, Hawaii [US], Indonesia, Malaysia, Papua New Guinea, Philippines (Oceania and S.E. Asia)

Distribution overview: Various species in the genus Tristania are distributed in the Indo-Malayan region and extend into Australia, the Philippines, and Indonesia. Six of the species are represented in the rocky shores, lowland, and hill or mountain forests in the Malay Peninsula. Some species in the genus have also been introduced into other regions.

Common uses: Bearings & bushings, Bobbins, Building construction, Building materials, Bushing blocks, Cabin construction, Construction, Domestic flooring, Factory construction, Farm vehicles, Flooring, Handles, Heavy construction, Machinery parts, Mine timbers, Pallets, Parquet flooring, Picker sticks, Shade rollers, Shafts/Handles, Shuttles, Specialty items, Spindles, Spools, Stencil & chisel blocks, Sub-flooring, Sucker rods, Tool handles, Umbrella handles , Wheels

Environment profile: Status has not been officially assessed

Tree size: Tree height is greater than 70 m

Colors: the heart isRed, Reddish brownand the sapwoodSapwood merges gradually into the heartwood , White.The grain isWavy, the textureMediumand the lusterSomewhat lustrous

Natural durability: Heartwood has moderate resistance to attack by decay fungi , Heartwood is moderately resistant to attack by termites and marine borers

Odor: No specific smell or taste

Silica Content: High

Kiln Schedules: T3-C2 (4/4) T3-C1 (8/4) US/T3-C2 (4/4) T3-C1 (8/4) U

Drying Defects: May warp, Ring Shakes

Ease of Drying: Very difficult to dry due to tendency to collapse

Comments: Hard and durable The genus Tristania is reported to produce hard and durable timber that are highly suited for making rice pestles, axe-handles, mallets, golf heads, and paddles. The common name Pelawan, used to refer to timber from the lowland forests in the Malay Peninsula, is indicative of the durability of the wood.

Blunting Effect: Severe blunting effect on cutting surfaces

Boring: Fairly difficult to very difficult

Carving: Fairly Difficult to Very Difficult

Cutting Resistance: Very difficult to saw

Gluing: Fairly Easy to Very Easy

Mortising: Fairly Difficult to Very Difficult

Moulding: Fairly Difficult to Very Difficult

Movement in Service: Fairly Difficult to Very Difficult

Nailing: Fairly Difficult to Very Difficult, Pre-Boring Recommended

Planing: Poor to Very Poor

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Very difficult to work with hand tools

Routing recessing: Fairly Difficult to Very Difficult

Sanding: Yields relatively smooth surfaces

Turning: Fairly Difficult to Very Difficult

Polishing: Good;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,78
Density 977 kg/m3
Bending Strength 978 1508 kg/cm2
Crushing Strength 434 722 kg/cm2
Hardness 1372 kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 130 168 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 961 785 kg/m3
Maximum Load cm-kg/cm3
Toughness 82 cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 13916 21462 psi
Density 61 lbs/ft3
Hardness 3025 lbs
Maximum Crushing Strength 6174 10275 psi
Stiffness 1862 2401 1000 psi
Toughness 72 inch-lbs
Specific Gravity 0.78
Weight 60 49. lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 9 %

Very heavy
Very hard
Compression strength (parallel to grain) = high
Bending strength (MOR) = high
It is very hard, and may be difficult to process with ordinary tools. It is very resistant to wear. The wood is exceptionally heavy. It weighs much more than Hard maple or Teak in the green or seasoned condition

Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Desch, H. E. 1954. Manual of Malayan Timbers - Volume II. Malayan Forest Records, No. 15. Malaysia Publishing House Ltd., Singapore.Eddowes, P.J. 1977. Commercial Timbers of Papua New Guinea - Their Properties and Uses. Forest Products Research Center, Office of Forests, Department of Primary Industry, Papua New Guinea.Schneider, E.E. 1916. Commercial Woods of the Philippines: Their Preparation and Uses. Bulletin No. 14. Department of the Interior, Bureau of Forestry, Manila, Philippines.
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