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ARIBANDA (Trichilia tessmannii)

Trade Name

Aribanda

Scientific Name

Trichilia tessmannii Harms

Family

MELIACEAE

Common Names

Ogiovallo (Nigeria); Aribanda (Côte d`Ivoire); Tobla (Congo); Nom oswé (Cameroon); Mayimbonagbanga (Cameroon); Lebonda (Cameroon); Aribanda

Scientific Name Synonyms

Trichilia mildbraedii Harms; Trichilia lanata A. Chev.

Description Of The Tree

Botanical Description

The tree is slightly buttressed. The bole is straight and cylindrical, may be up to 20 m in length. The trunk diameter attains 80 cm.

Natural Habitat

Trichilia tessmannii is sporadically present in evergreen and semi-deciduous forests.

Natural Distribution

West Africa, from Sierra Leone to Cabinda and to the Democratic Republic of the Congo.

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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). Non-vestured pits. Vessels per mm2 6 to 10 (medium). Simple perforation plates. Vessel-ray pits similar to intervessel pit Axial parenchyma aliform. Axial parenchyma confluent. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 2 seriate. Silica bodies in the ray cells. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal ce Non-septate fibers. Fibers with simple to minutely bordered pits.

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

Availability

Cites Status

Unrestricted

General Wood Description

Color

The heartwood is pinkish grey, it is not clearly demarcated.

Grain

Straight or slightly interlocked, sometimes with an influence on further processing operations.

Texture

The wood is typically fine in texture.

Natural Durability

Not durable; important risks of decay attacks at any processing step, from logs up to final products. It must receive preservative treatment. Sensible to termites attack. The heartwood is sensible to Lyctus attacks.

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

5

Wood Physical Properties

Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)

0.54

Air-dry Density (Weight and volume at 12%MC) (g/cm³)

0.59

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

6.2

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

4.9

Drying Defects

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

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

1.3

Wood Chemical Properties

Wood Mechanical Properties

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

880

Stiffness (MOE) 12%MC (kgf/cm²)

124000

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

487

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

60

Shear strength radial 12%MC (kgf/cm²)

63

Janka hardness (side) 12%MC (kgf)

429

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

533

Workability

Sawing

It is easy to saw.

Rotary Veneer Cutting

Not suitable for veneering.

Sliced Veneer

Not suitable for veneering.

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

No particular problem.

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

No particular problems.

REFERENCED USES

End Uses Summary

HOUSING GENERAL, boards, frames, FURNITURE AND CABINETS, common furniture, PACKING, light packing, OTHER AND MUSICAL INSTRUMENTS, moldings

General Housing
  • 10 - Silica in Timbers
Boards
  • 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Frames
  • 16 - Woods of the World
Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Furniture, Common
  • 23 - Handbook of Hardwoods
Packing
  • 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Light Packing
  • 46 - ECUADOR, Inventario y Aprovechamiento de los Bosques del Sur Ecuatoriano
Molding
  • 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão

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