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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.

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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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