GOMBé (Didelotia idae)
Nombre comercial
Gombé
Nombre científico (con autor)
Didelotia idae Oldeman de Wit et Leon.
Familia
LEGUMINOSAE
Nombres Comunes
Timba (Sierra Leone); Bondu (Liberia); Broutou (Côte d`Ivoire); Angok (Gabon); Ekop-gombé (Cameroon); Gombé
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
The tree may reach a height of 50 m, with diameters from 130 to 170 cm. The bole is clear to 26 m, straight and cylindrical. The buttresses are thick and usually short.
Hábitat natural
Didelotia idae is found in wet evergreen rain forests and in swampy forests.
IDENTIFICACIÓN DE LA MADERA
Descripción anatómica de la madera
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits Occasionally axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma lozenge-aliform. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 cells per pare Rays more than 10 per mm (abundant). Rays and/or axial elements irregularly storied. Rays non-storied. Rays exclusively uniseriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Body ray cells procumbent with one row of upright and/o Non-septate fibers. Fibers with simple to minutely bordered pits.
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Foto macroscópica de la madera, plano tangencial
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Foto microscópica sección transversal de la madera
Disponibilidad
Status de protección por CITES
Unrestricted
DESCRIPCIÓN GENERAL DE LA MADERA
Color
The sapwood is red-brown to pale brown, it has a thickness of 5 to 7.5 cm. The heartwood is pale red-brown with a greenish tint near the sapwood, it is clearly demarcated.
Indice de Color (1= Negro, violeta; 7= Amarillo claro, blanco)
5
Grano
Straight or slightly interlocked; grain has no particular influence on drying, machining and finishing qualities.
Veta
The texture of the wood is frequently coarse.
Brillo
Luster is reported to be low.
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
Residual growth stresses are absent.
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)
0.57
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.62
Contracción Tangencial Total (Saturado hasta anhidro) (%)
8.8
Contracción Radial Total (Saturado hasta anhidro) (%)
4.6
Defectos por secado
Ease of Drying: The boards of this species air dry without difficulty. It takes about 4 months to air dry boards 15 mm thick. Drying Defects: It is reported to be prone to warp and end checking. End splitting may be severe. Kiln Schedules: For kiln drying, a temperature of 40.5 to 65.5 degrees is recommended with corresponding relative humidity of 85% to 40%.
Calendario de Secado
FR-7
Estabilidad Dimensional (Contracción Total Tangencial %/Contracción Total Radial %)
1.9
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
906
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
135983
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
535
Resistencia a la compresión perpendicular a la fibra CH12% (kgf/cm²)
68
Cizallamiento radial CH12% (kgf/cm²)
55
Dureza Janka (lados) CH12% (kgf)
480
Dureza Janka (extremos) CH12% (kgf)
583
TRABAJABILIDAD
Aserrado
It is easy to saw.
Corte de chapa rotativa
Suitable for slicing, also suitable for peeling if treated.
Chapa tranchada
Suitable for slicing, also suitable for peeling if treated.
Pérdida de filo_romado
Slight blunting effect; ordinary tools can be used for sawing and machining.
Maquinado general
Machining of this species is reportedly easy.
Cepillado
Moderately easy; tools must be cautiously sharpened.
Moldurado
Easy; no particular problems.
Taladrado
Easy; no particular problems.
Escopleado, caja y espiga
Easy; no particular problems.
Clavado
Pre-boring is necessary.
Encolado
Glues well if basic gluing technical rules are followed.
Lijado
Easy to perform; it gives good results.
Sacar lustre
Needs pre-coating.
Doblar al vapor
This species can be used for steam bending.
Facilidad para herramientas manuales
No particular problems.
Usos Reportados
USOS FINALES (RESUMEN)
HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, steps, panelling, fittings, shutter boards, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, Decorative veneer, PACKING, heavy packing, pallets, CONTAINERS, truck bodies, truck flooring
VIVIENDA GENERAL
- 10 - Silica in Timbers
vigas
- 11 - Prospect: The wood database
Viguetas
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Tablas
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Pisos
- 14 - Handbook of Hardwoods
Parquet
- 15 - Empire Timbers
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
Carrocería de camión
- 53 - Timbers of the New World
Pisos de vagones_contenedores
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
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