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TRISTIROPSIS (Tristiropsis acutangula)
Trade Name
Tristiropsis
Scientific Name
Tristiropsis acutangula Radlk.
Family
SAPINDACEAE
Common Names
Gasi-gasi (Philippines); Hende (Indonesia); Lere (Indonesia); Kugwo (West Irian); Kugwo (Indonesia); Brayo (Philippines); Tungum-tagum (Philippines)
Scientific Name Synonyms
Tristiropsis subfalcata Radlk; Tristiropsis oblonga Radlk.; Tristiropsis canarioides Boerl. ex Valeton
Description Of The Tree
Botanical Description
Small to fairly large trees, up to 35 m tall. The bole is branchless for up to 25 m and diameters of 100 cm, often twisted or sinuous, with buttresses up to 3 m high.
Natural Habitat
It is often an upper-storey component of primary and secondary forests in lowlands, rarely found above 500 m. It is also found near the coast in New Guinea.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Colored deposits in heartwood vessels. Vessels per mm2 5 to 20. Occasionally vessels per mm2 less than 6. Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits medium, 7 to 10 micras. Inte Axial parenchyma in marginal or in seemingly marginal bands. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Axial parenchyma aliform. Axial parenchyma confluent. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 to 10 rays per mm (medium). Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Septate fibers present. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Odor
Sometimes it has distinct odor.
Color
The sapwood varies in color from pale pink or cream to pinkish-brown. The heartwood is gray-brown to red-brown.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
Straight or interlocked grain is often found in this species.
Texture
The texture varies from medium to coarse.
Luster
It is a lustrous wood.
Natural Durability
This timber is liable to sap-stain, pinhole borer and termite attack.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Resistance To Impregnation
The heartwood is extremely resistant to impregnation, sapwood is only patchily penetrated by preservatives.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.63
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.70
Total shrinkage Tangential (Saturated to 0%MC) (%)
12.6
Total shrinkage Radial (Saturated to 0%MC) (%)
5.6
Drying Defects
Ease of Drying: Drying is moderately difficult to difficult; special care is systematically needed. Drying Defects: Risks of distortions. Kiln Schedules: The kiln schedule has been tested.
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.3
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1137
Stiffness (MOE) 12%MC (kgf/cm²)
155372
Compression parallel to fiber 12%MC (kgf/cm²)
560
Compression perpendicular to fiber 12%MC (kgf/cm²)
79
Shear strength radial 12%MC (kgf/cm²)
155
Janka hardness (side) 12%MC (kgf)
592
Janka hardness (end grain) 12%MC (kgf)
805
Workability
Sawing
It is easier to cut when dry, fibrous surfaces are reported after sawing.
Rotary Veneer Cutting
Lamination of this species is possible.
Sliced Veneer
Lamination of this species is possible.
Machining
Machining properties are reasonably good with a satisfactory finish, but grain may pick up on back-sawn material. A cutting angle of 20 degrees is recommended.
Turning
30
Finishing
The response of this species in finishing is good to fair.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, flooring, panelling, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, TURNING, TOOLS, tool handles, PACKING, NAVAL CONSTRUCTION, boats, OTHER AND MUSICAL INSTRUMENTS, moldings, paper
General Housing
- 10 - Silica in Timbers
Flooring
- 14 - Handbook of Hardwoods
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Cabinet
- 24 - Empire Timbers
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Turning
- 30 - Embassy of Honduras in Japan
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Boats
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
Paper
- 82 - Compilation of Data on the Mechanical Properties of Foreign woods (Part 2) Central and South America.
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