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GYO (Schleichera oleosa)
Trade Name
Gyo
Scientific Name
Schleichera oleosa (Lour.) Oken.
Family
SAPINDACEAE
Common Names
Gyo (Myanmar)
Description Of The Tree
Botanical Description
It is a medium sized deciduous tree, growing up to 24 m tall, usually with a short clear bole of about 6 m in length. It is often fluted.
Non Timber Uses
It is reportedly the strongest wood in Sri Lanka.
Wood Identification
Anatomic Description Of Wood
Colored deposits in heartwood vessels. Vessels per mm2 5 to 20. Simple perforation plates. 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. Prismatic crystals in non-chambered axial parenchyma cells. Rays more than 10 per mm (abundant). Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent).
Availability
Cites Status
Unrestricted
General Wood Description
Color
The wood is yellowish brown to pale reddish brown.
COLOR INDEX (1=Black, 7=Light yellow,white)
4
Grain
This species is reported to have straight grain.
Texture
The texture of the wood is fine.
Natural Durability
It is non-durable in contact with the ground.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Resistance To Impregnation
This wood is amenable to preservative treatments.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.95
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
1.12
Total shrinkage Tangential (Saturated to 0%MC) (%)
10.8
Total shrinkage Radial (Saturated to 0%MC) (%)
5.5
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.0
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1583
Stiffness (MOE) 12%MC (kgf/cm²)
181000
Compression parallel to fiber 12%MC (kgf/cm²)
746
Workability
Sawing
Sawmilling of this species is reportedly difficult.
Sanding
It is easy to sand.
REFERENCED USES
End Uses Summary
EXTERIOR GENERAL, crossties, HOUSING GENERAL, TOOLS, tool handles, agricultural tools
Exterior General
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Crossties
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
General Housing
- 10 - Silica in Timbers
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
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