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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