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WALIK UKUN (Schoutenia ovata)
Trade Name
Walik ukun
Scientific Name
Schoutenia ovata Korth.
Family
TILIACEAE
Common Names
Walik ukun; Popel thuge (Cambodia); Ach-sat (Cambodia); Ken thao (Laos); Daeng nieo (Thailand); Daeng saeng (Thailand); Daeng samae (Thailand); East Indian meet-wood; Harikukun (Indonesia)
Scientific Name Synonyms
Schoutenia hypoleuca Pierre; Actinophora hypoleuca (pierre) O. Kuntze; Actinophora fragrans Wallich ex R. Br.
Description Of The Tree
Botanical Description
It is a small to medium sized tree, up to 35 m tall. The bole is fairly short, up to 60 cm in diameter, sometimes fluted or with buttresses up to 1.7 m high.
Natural Habitat
Schoutenia species sometimes occur gregariously in moist locations in primary rain forests, up to 900 m of altitude.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Vessels per mm2 5 to 20. Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits small, 7 micras or less. Occasionally axial parenchyma in marginal or in seemingly marginal bands. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Occasionally paratracheal axial parenchyma scanty and/or vas 4 to 10 rays per mm (medium). Occasionally rays and/or axial elements irregularly storied. Occasionally larger rays more than 4 seriate. Prismatic crystals in the ray cells. Occasionally body ray cells procumbent with mostly 2 to 4 rows of upright and/or squa Fibers very thick walled. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is purple-gray-brown to dark purple-brown, not clearly differentiated from the sapwood.
Grain
This species is reported to have typically straight or interlocked grain.
Texture
This species is reported to have a moderately fine texture.
Natural Durability
The wood is moderately durable to very durable, even in contact with the ground or when exposed to the weather.
Natural durability index (1= Very high durability, 7=Vey low durability)
4
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.85
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.98
Drying Defects
Ease of Drying: Drying is fairly easy; some difficulties could occur when drying too fast. Drying Defects: No particular risks of drying defects, subject to normal drying conditions. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1274
Stiffness (MOE) 12%MC (kgf/cm²)
125846
Compression parallel to fiber 12%MC (kgf/cm²)
622
Compression perpendicular to fiber 12%MC (kgf/cm²)
224
Shear strength radial 12%MC (kgf/cm²)
138
Janka hardness (side) 12%MC (kgf)
857
Janka hardness (end grain) 12%MC (kgf)
999
Workability
Machining
Although it is a hard wood it gives good results in machining.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, SPORTS, TOOLS, tool handles, agricultural tools, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, axle, wheel
General Housing
- 10 - Silica in Timbers
Sports
- 38 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Agricultural Tools
- 44 - Atlas of Peruvian Woods
Truck Body
- 53 - Timbers of the New World
Truck Flooring
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Axles
- 73 - Handbook of Hardwoods
Wheels
- 75 - Tropenholzer
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