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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.

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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).

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

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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