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OKOUMé (Aucoumea klaineana)
Nombre comercial
Okoumé
Nombre científico (con autor)
Aucoumea klaineana Pierre
Familia
BURSERACEAE
Nombres Comunes
Okume (Equatorial Guinea); N'goumi (Equatorial Guinea); N'kumi (Congo); Zouga; Uume; Ongoumi; Ojoume; Mofoumou; M`goumi; Koumi; Gaboon wood; Gaboon mahogany; Cape Lomez mahogany; Bengouma; Acoume; N`koumi (Gabon); Moukoumi (Gabon); Gaboon (United Kingdom); N`kumi (Congo); Angouma (Gabon); Okoume (Gabon); N`goumi (Equatorial Guinea)
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
The tree reaches a height of 32 to 43 m, sometimes to more than 50 m. The bole is cylindrical and clear to 23 m in length and more. The trunk diameter attains 100 up to 250 cm over large buttresses.
Hábitat natural
Okoumé occurs abundantly in an area covering west and central Gabon and small areas of neighboring countries. It is known or inferred that the harvesting of specimens from the wild for international trade has, or may have, a detrimental impact on the spec
Distribución natural
From Cameroon down to the Democratic Republic of the Congo.
Existencia de plantaciones?
It is a long rotation species for plantation. The duration of the rotation is 40 years, to reach 60 cm in diameter.
IDENTIFICACIÓN DE LA MADERA
Descripción anatómica de la madera
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 150 to 200 micras (medium). Tyloses thin walled. Non-vestured pits. Vessels per mm2 6 to 10 (medium). Simple perforation plates. Vessel-ray pits large Paratracheal axial parenchyma scanty and/or vasicentric. 4 to 10 rays per mm (medium). Rays non-storied. Rays commonly 2 seriate. Silica bodies in the ray cells. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Septate fibers present. Fibers with simple to minutely bordered pits.
Disponibilidad
Status de protección por CITES
Unrestricted
DESCRIPCIÓN GENERAL DE LA MADERA
Color
The sapwood is greyish white, it has a thickness of 2 to 5 cm. The heartwood is salmon-pink to dark-pink, darkening on exposure, it is clearly demarcated. The silver figure is fine (barely visible).
Indice de Color (1= Negro, violeta; 7= Amarillo claro, blanco)
5
Grano
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Veta
The texture varies from fine to medium.
Brillo
It is reported to be low in luster.
Durabilidad Natural
Slightly durable to decay. This species needs preservative treatment for uses with risks of occasional re-humidification. It is not suited for uses with risks of permanent or long-lasting humidification. Sensible to termites attack. The heartwood is resistant
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
6
Internal growth stresses
No growth stresses are reported in this species.
Contenido de sílice
Silica Content: Silica presence is reported. Amounts over 0.05% may affect wood processing. Silica Value: 0.17
Dificultad para impregnar
Difficult to treat with only a low penetration of the preservative products.
PROPIEDADES FÍSICAS DE LA MADERA
Densidad Básica (Peso anhidro/Vol. saturado) (g/cm³)
0.41
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.44
Contracción Tangencial Total (Saturado hasta anhidro) (%)
6.9
Contracción Radial Total (Saturado hasta anhidro) (%)
4.6
Calendario de Secado
FR-7
Estabilidad Dimensional (Contracción Total Tangencial %/Contracción Total Radial %)
1.5
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
632
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
98819
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
370
Resistencia a la compresión perpendicular a la fibra CH12% (kgf/cm²)
41
Cizallamiento radial CH12% (kgf/cm²)
58
Dureza Janka (lados) CH12% (kgf)
240
Dureza Janka (extremos) CH12% (kgf)
336
TRABAJABILIDAD
Aserrado
It is easy to saw.
Corte de chapa rotativa
Suitable for slicing and peeling.
Chapa tranchada
Suitable for slicing and peeling.
Pérdida de filo_romado
Severe blunting effect; stellited blades for sawing and carbide tools for machining are recommended.
Maquinado general
Possible difficulties caused by interlocked grain are reported.
Cepillado
Easy; no particular problems.
Moldurado
Easy; no particular problems.
Taladrado
Easy; no particular problems.
Escopleado, caja y espiga
Easy; no particular problems.
Clavado
No particular problem.
Encolado
Glues well if basic gluing technical rules are followed.
Lijado
Easy to perform; it gives good results.
Sacar lustre
Can be polished without surface preparation.
Facilidad para herramientas manuales
No particular problems.
Usos Reportados
USOS FINALES (RESUMEN)
HOUSING GENERAL, boards, frames, steps, panelling, fittings, shutter boards, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, Decorative veneer, PACKING, heavy packing, pallets, OTHER AND MUSICAL INSTRUMENTS, door core, coffin, moldings
VIVIENDA GENERAL
- 10 - Silica in Timbers
Tablas
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Marcos
- 16 - Woods of the World
Peldaños
- 17 - Tree Conservation Database
Paneles
- 18 - W3TROPICOS Missouri Botanical Garden
Accesorios de madera
- 19 - Silica in Timbers
Persianas
- 20 - Prospect: The wood database
MUEBLES Y GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Muebles comunes
- 23 - Handbook of Hardwoods
TABLEROS Y CHAPAS
- 25 - Directory of Timber Trade Malaysia
Caras
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
chapa decorativa
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
PALLETS_EMBALAJES
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Envase pesado
- 47 - Arvores Brasileiras
Pallets
- 48 - The strength properties of timbers
Alma de puerta
- 76 - Descripción General y Anatómica de 105 Maderas del Grupo Andino.
Ataúd
- 78 - Amazonian Timbers for the International Market
Molduras
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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