DAO (Trichoscypha arborea)
Trade Name
Dao
Scientific Name
Trichoscypha arborea A.Chev.
Family
ANACARDIACEAE
Common Names
Tao (Côte d`Ivoire); Dao (Côte d`Ivoire); Ekong (Cameroon)
Scientific Name Synonyms
Trichoscypha ferruginea Engl.; Emiliomarcelia arborea A. Chev.
Description Of The Tree
Botanical Description
The tree reaches a height of 16 to 30 m. The bole is usually straight but may be twisted in arid areas. The trunk diameter attains 30 to 70 cm.
Natural Habitat
Trichoscypha arborea occurs in evergreen, dense forests, along watercourses and in coastal formations.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 to 150 micras (small). Tyloses thin walled. Non-vestured pits. Vessels per mm2 10 to 20 (abundant). Simple perforation plates. Vessel-ray pits coa Paratracheal axial parenchyma scanty and/or vasicentric. Non-crystals in axial parenchyma cells. 3 to 4 cells per parenchyma strand. Rays more than 10 per mm (abundant). Rays non-storied. Rays 1 to 4 seriate. Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Non-septate fibers. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The sapwood is grey with slight red streaks. The heartwood is green-pink or brown, it is clearly demarcated.
Grain
Wavy; special care is needed when machining in order to obtain satisfying quality surface.
Texture
The texture of the wood is fine.
Natural durability index (1= Very high durability, 7=Vey low durability)
4
Silica Content
Silica Content: Silica content is negligible. Amounts over 0.05% may affect wood processing. Silica Value: 0.03
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.67
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.76
Drying Defects
Ease of Drying: Drying is rather slow and sometimes difficult to perform. Drying Defects: Risks of 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.
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1265
Compression parallel to fiber 12%MC (kgf/cm²)
681
Compression perpendicular to fiber 12%MC (kgf/cm²)
94
Janka hardness (side) 12%MC (kgf)
710
Janka hardness (end grain) 12%MC (kgf)
796
Workability
Sawing
It is moderately easy to saw.
Rotary Veneer Cutting
Not suitable for veneering.
Sliced Veneer
Not suitable for veneering.
Blunting Effect
Slight blunting effect; ordinary tools can be used for sawing and machining.
Machining
Machining of this species is reportedly easy.
Planing
Moderately easy; tools must be cautiously sharpened.
Moulding
Easy; no particular problems.
Boring
Easy; no particular problems.
Mortising
Easy; no particular problems.
Nailing
Pre-boring is necessary.
Gluing
Glues well if basic gluing technical rules are followed.
Sanding
Easy to perform; it gives good results.
Polishing
Can be polished without surface preparation.
Response To Hand Tools
Working with hand tools is difficult.
REFERENCED USES
End Uses Summary
EXTERIOR GENERAL, HOUSING GENERAL, flooring, fittings, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, cores, TOOLS, agricultural tools, OTHER AND MUSICAL INSTRUMENTS, handicrafts, particleboard
Exterior General
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
General Housing
- 10 - Silica in Timbers
Flooring
- 14 - Handbook of Hardwoods
Fittings
- 19 - Silica in Timbers
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
Cores
- 27 - Embassy of Brazil in Japan
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Agricultural Tools
- 44 - Atlas of Peruvian Woods
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Particleboard
- 80 - Estudio Integral de la Madera para Construcción
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