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Malabayabas
Malabayabas (Tristania decorticata)

Family: Myrtaceae

Common names: Brush Box, Malabayabas, Tiga, Tinadan

Distributed in: Philippines (Oceania and S.E. Asia)

Distribution overview: The genus Tristania is composed of small to medium-sized trees that occur in the Indo-Malayan region, extending into Australia, the Philippines, and Indonesia. Some species in the genus have also been introduced into other tropical regions. In the Philippines,Tristania decorticata is generally found on low ridges near the coast.

Common uses: Barge fenders, Bearings & bushings, Building construction, Building materials, Bushing blocks, Cabin construction, Construction, Docks, Dockwork, Domestic flooring, Factory construction, Farm vehicles, Flooring, Harbor work, Heavy construction, Machinery parts, Marine construction, Mine timbers, Naval architecture, Parquet flooring, Poles, Pulley wheels, Raft floats, Rafts, Shipbuilding, Sub-flooring, Textile equipment, Utility poles, Wharf construction, Wheels

Environment profile: Vulnerable in parts of its natural habitat

Tree size: Tree height is 10-20 m The trees often develop irregular boles and pronounced buttresses

Colors: the heart isPurple, Redand the sapwoodRed, Sapwood merges gradually into the heartwood .The grain isWavy, the textureMediumand the lusterGlossy

Natural durability: Resistant to termite attack, Resistant to termites

Odor: No specific smell or taste

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

Kiln Drying Rate: Naturally dries slowly

Drying Defects: May check, May warp

Ease of Drying: Slowly

Comments: Deposits - Vessels contain a reddish extractive.

Cutting Resistance: Easy to saw

Gluing: Fairly Easy to Very Easy

Nailing: Pre-boring required, Very Good to Excellent

Planing: Very Good to Excellent

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Responds poorly to hand tools


Polishing: Very Good to Excellent; Varnishing: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,89 1,03
Density 993 kg/m3
Bending Strength 1195 1857 kg/cm2
Crushing Strength 155 219 kg/cm2
Hardness 1931 kg
Impact Strength cm
Shearing Strength 171 kg/cm2
Stiffness 158 195 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 977 801 kg/m3
Maximum Load cm-kg/cm3
Toughness 738 cm-kg
Static Bending 664 1131 kg/cm2
Item Green Dry English
Bending Strength 17005 26413 psi
Crushing Strength 2209 3116 psi
Density 62 lbs/ft3
Hardness 4258 lbs
Maximum Crushing Strength 7533 13024 psi
Shearing Strength 2439 psi
Static Bending 9450 16099 psi
Stiffness 2258 2780 1000 psi
Toughness 641 inch-lbs
Specific Gravity 0.89 1.03
Weight 61 50. lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 9 %

Very heavy
Very hard
Very dense
Resists denting and marring
Compression strength (parallel to grain) = high
Bending strength (MOR) = high
It is exceptionally hard and very difficult to work with ordinary tools. It does not marr or dent, except under extreme conditions. The wood is exceptionally heavy. It weighs much more than Hard maple or Teak in the green or seasoned condition. The wood is very dense.

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.Keating, W.G., Bolza, E.,1982,Characteristics properties and uses of timbers. South East Asia, Northern,Australia and the Pacific,C.S.I.R.O. Div. Chemical Technology,Inkata Press,1Lauricio, F. M., Bellosillo, S. B., The Mechanical and Related Properties of Philippine Woods, The Philippine Lumber Journal, 12(5):A-HSchneider, E.E. 1916. Commercial Woods of the Philippines: Their Preparation and Uses. Bulletin No. 14. Department of the Interior, Bureau of Forestry, Manila, Philippines.WCMC. 1992. Conservation Status Listing - Trees and Timbers of the World. World Conservation Monitoring Center-Plants Programme, Cambridge, CB3 ODL, United Kingdom.
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