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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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