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PELAJAU (Pentaspadon velutinus)
Trade Name
Pelajau
Scientific Name
Pentaspadon velutinus Hook.f.
Family
ANACARDIACEAE
Common Names
Pelayau (Sarawak); Pelong (Malaysia); Vi hung trung (Vietnam); Toei-na (Thailand); Pelaju (Indonesia)
Scientific Name Synonyms
Microstemon velutina Engl.
Description Of The Tree
Botanical Description
It is a large tree up to 60 m tall. The bole is up to 90 cm in diameter, with buttresses up to 2.5 m high.
Natural Habitat
This species is reported up to 350 m of altitude on well drained locations along rivers or periodically inundable places and swamp forests.
Wood Identification
Anatomic Description Of Wood
Occasionally tyloses common. Vessels per mm2 5 to 20. Vessel-ray pits reticulate and/or foraminate. Simple perforation plates. Intervessel pits medium, 7 to 10 micras. Paratracheal axial parenchyma scanty and/or vasicentric. 3 to 4 cells per parenchyma strand. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is whitish-yellow or yellow-green to pale gray-pink and often indistinctly demarcated from the sapwood, which is greenish-white to pale yellow with a pink tinge)
Grain
The grain is straight to shallowly interlocked.
Texture
Texture is reported to be moderately fine and even.
Natural Durability
The wood is rated as moderately durable. It is susceptible to attack by termites and powder-post beetles.
Natural durability index (1= Very high durability, 7=Vey low durability)
3
Resistance To Impregnation
The sapwood is permeable, but the heartwood is difficult to preserve either with oil or water soluble preservatives.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.51
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.56
Total shrinkage Tangential (Saturated to 0%MC) (%)
6.7
Total shrinkage Radial (Saturated to 0%MC) (%)
4.0
Drying Defects
Ease of Drying: The timber air dries well without serious degrade.
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.7
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
836
Stiffness (MOE) 12%MC (kgf/cm²)
84068
Compression parallel to fiber 12%MC (kgf/cm²)
392
Compression perpendicular to fiber 12%MC (kgf/cm²)
82
Shear strength radial 12%MC (kgf/cm²)
173
Janka hardness (side) 12%MC (kgf)
418
Workability
Sawing
This species is reported to be easy to saw but some gumming up of the saw teeth may occur.
Machining
Machining of this species is reported to be easy.
Planing
This species is easy to plane, giving a smooth surface.
Boring
It is easy to bore.
Nailing
Nailing properties are rated as poor.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, boards, flooring, panelling, PLYWOOD AND VENEER, PACKING, OTHER AND MUSICAL INSTRUMENTS, handicrafts, moldings
General Housing
- 10 - Silica in Timbers
Boards
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Flooring
- 14 - Handbook of Hardwoods
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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