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PETALING (Ochanostachys amentacea)
Trade Name
Petaling
Scientific Name
Ochanostachys amentacea Mast.
Family
Olacaceae
Common Names
Petaling (Indonesia); Petikal (Sarawak); Tumbung asu (Indonesia); Tanggal (Sabah)
Description Of The Tree
Botanical Description
It is a medium-sized to sometimes large evergreen tree up to 30 m tall. The bole is straight or rather poorly shaped, branchless for up to 15 m, up to 60 cm in diameter, fluted and often with short buttresses at base.
Natural Habitat
A monotypic genus found scattered in the understorey, occasionally reaching the canopy, of primary and secondary lowland rainforest, often mixed dipterocarp forest. The tree is slow-growing; taking about 150 years to reach a diameter of 50 cm.
Plantations Available?
Petaling has been used for underplanting in forest plantations to reduce the weed growth.
Wood Identification
Anatomic Description Of Wood
Tangential diameter of vessel lumina 100 micras or less (very small). Occasionally tyloses common. Vessels per mm2 more than 20 (very abundant). Vessel-ray pits reticulate and/or foraminate. Intervessel pits large, 10 micras or more. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. Over 9 cells per parenchyma strand. Axial parenchyma in narrow bands on lines up to 3 cells wide. Rays more than 10 per mm (abundant). Ray height more than 1 mm. Occasionally sheath cells. Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Fibers very thick walled. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is red-brown to purplish red-brown or purplish-gray, darkening upon exposure, moderately demarcated from the dark brownish-yellow to pale red-brown sapwood.
COLOR INDEX (1=Black, 7=Light yellow,white)
4
Grain
It has interlocked grain.
Texture
The wood is frequently reported to be fine textured.
Luster
The wood surface is glossy.
Natural Durability
The wood is durable to moderately durable, except in water. The heartwood is considerably resistant to termites attack.
Natural durability index (1= Very high durability, 7=Vey low durability)
4
Silica Content
Silica Content: It contains 0.1% silica. Silica Value: 0.1
Resistance To Impregnation
Impregnation of the sapwood is easy, but the heartwood is reportedly difficult to treat.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.80
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.91
Total shrinkage Tangential (Saturated to 0%MC) (%)
8.5
Total shrinkage Radial (Saturated to 0%MC) (%)
4.3
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.0
Wood Chemical Properties
Wood Mechanical Properties
Compression parallel to fiber 12%MC (kgf/cm²)
618
Compression perpendicular to fiber 12%MC (kgf/cm²)
65
Shear strength radial 12%MC (kgf/cm²)
101
Janka hardness (side) 12%MC (kgf)
649
Janka hardness (end grain) 12%MC (kgf)
649
Workability
Rotary Veneer Cutting
This species is reported to have good characteristics for lamination. It can be peeled without pre-treatment.
Sliced Veneer
This species is reported to have good characteristics for lamination. It can be peeled without pre-treatment.
Planing
Planing operations are rather easy.
Moulding
Molding operations it gives good results.
Boring
Boring is reported to be easy.
Mortising
It is easy to mortise.
Nailing
It splits on nailing, pre-boring is recommended.
Gluing
Gluing of this species is easy.
Sanding
It has a good sanding behavior.
REFERENCED USES
End Uses Summary
EXTERIOR GENERAL, bridges, poles, stakes posts, rails, HOUSING GENERAL, flooring, FURNITURE AND CABINETS, SPORTS, TOOLS, tool handles, PACKING, pallets
Exterior General
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Bridges
- 2 - 25 madeiras da amazonia de valor comercial, caracterizacao, macroscopica, usos comuns e indices qualificativos
Poles
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Stake Posts
- 5 - Propriedades fisicas e mecanicas da madeira e do contraplacado de Pinus elliottii
Rails
- 6 - Physical and mechanical properties of Eucalyptus deglupta Blume grown in Costa Rica
General Housing
- 10 - Silica in Timbers
Flooring
- 14 - Handbook of Hardwoods
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
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)
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Pallets
- 48 - The strength properties of timbers
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