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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.
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.
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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