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SLOANEA (Sloanea sigun)

Trade Name

Sloanea

Scientific Name

Sloanea sigun (Blume) K. Schumann

Family

ELAEOCARPACEAE

Common Names

Ko rian (Thailand); Landakan (Indonesia); Ngoh pa (Thailand); Si bala kayu (Sumatra); Si bala kayu (Indonesia); Ki somang (Indonesia); Sati ton (Thailand)

Scientific Name Synonyms

Echinocarpus sigun Blume

Description Of The Tree

Botanical Description

It is an evergreen tree, up to 40 m high and 70 cm in diameter. The trunk is not straight, branchless for up to 17 m. The bole is often fluted or with large buttresses, up to 3 m high.

Natural Habitat

Sloanea sigun is widespread in Sabah. It can be a dominant tree, occurring scattered in primary or secondary forests, up to 2,000 m of altitude.

Wood Identification

Anatomic Description Of Wood

Tyloses common. Vessels per mm2 5 to 20. Vessel-ray pits reticulate and/or foraminate. Simple perforation plates. Intervessel pits large, 10 micras or more. Rays of two distinct sizes. Larger rays more than 4 seriate. Sheath cells. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Fibers with distinctly bordered pits.

Availability

Cites Status

Unrestricted

General Wood Description

Color

The heartwood is cream to brown, sometimes with an olive tinge, not clearly differentiated from the pale brown sapwood.

Grain

The grain is mostly straight

Texture

The texture varies from moderately fine to moderately coarse.

Luster

The wood luster is reported to be rather moderate.

Natural Durability

It is perishable and rapidly attacked if it is unprotected.

Natural durability index (1= Very high durability, 7=Vey low durability)

5

Resistance To Impregnation

The heartwood is moderately easy to preserve, but the sapwood takes preservatives easily.

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)

0.55

Total shrinkage Tangential (Saturated to 0%MC) (%)

7.8

Total shrinkage Radial (Saturated to 0%MC) (%)

3.8

Drying Defects

Ease of Drying: Drying is very slow and difficult to perform; defects are frequent. Drying Defects: Risks of checks and distortions. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.

Recommended Dry Kiln Schedule

JP-25

Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)

2.0

Wood Chemical Properties

Wood Mechanical Properties

Bending Strength (MOR),12%MC (kgf/cm²)

754

Stiffness (MOE) 12%MC (kgf/cm²)

95022

Compression parallel to fiber 12%MC (kgf/cm²)

392

Compression perpendicular to fiber 12%MC (kgf/cm²)

92

Shear strength radial 12%MC (kgf/cm²)

71

Janka hardness (side) 12%MC (kgf)

333

Janka hardness (end grain) 12%MC (kgf)

394

Workability

Sawing

Wood of this species is easy to cut.

Rotary Veneer Cutting

This species is reported to have good characteristics for lamination.

Sliced Veneer

This species is reported to have good characteristics for lamination.

Machining

The response of this species to machining operations is good to fair.

Turning

30

Response To Hand Tools

This species is reported to have a good to fair response to hand tools.

REFERENCED USES

End Uses Summary

HOUSING GENERAL, flooring, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, TURNING, PACKING, OTHER AND MUSICAL INSTRUMENTS, handicrafts, matches, moldings

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.
Cabinet
  • 24 - Empire Timbers
Panels, Veneers
  • 25 - Directory of Timber Trade Malaysia
Turning
  • 30 - Embassy of Honduras in Japan
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.)
Matches
  • 71 - Proprietes physiques et mecaniques des bois tropicaux, premier supplement
Molding
  • 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão

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