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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.

  • Wood Macro Photo Tangential Plane
  • Wood Micro Photo Of Transversal Section

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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