DABEMA (Piptadeniastrum africanum)
Nombre comercial
Dabema
Nombre científico (con autor)
Piptadeniastrum africanum Brenan
Familia
LEGUMINOSAE
Nombres Comunes
Mbele (Sierra Leone); Guli (Sierra Leone); Beyae (Guinea); Odan (Ghana); Elae (Ghana); Dabema (Côte d`Ivoire); Odan (United Kingdom); Elae (United Kingdom); Ekhimi (United Kingdom); Agboin (United Kingdom); N'singa (Congo); Koungou (Central African Republic); N'singa (Angola); Wunga; To; Singa; Sanga; Redwood; Odanwoma; Odannan; Odane; Odan; Nga; N-go; Mussasae; Musese; Mugeye; Mbele-guli; Koungou; Ka-bari; K-kuperb; Jondo; Itoumb?; Gau; Erundu; Eran; Elany; Elae; Ekhivi; Dubima; Dane; Dandad; Chen; Bokungo; Bokundu; Bi-eh; Banzu; Akasanumu; Agbion; African greenheart; Bokungu (Zaire); N`inga (Angola); N`singa (Congo); Toum (Gabon); Tom (Equatorial Guinea); Atui (Cameroon); Mbeli (Liberia); Ekhimi (Nigeria); Agboin (Nigeria); Dahoma (Ghana); Debema (Côte d`Ivoire); Bukundu (Netherlands); Ekhim (United Kingdom); Dahoma (United Kingdom); Mpewere (Uganda); Likundu (Zaire); Dabema
Nombres científicos sinónimos (con autores)
Piptadenia africana Hook. f.
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
The tree reaches a height of 26 to 32 m, with trunk diameters up to 130 cm. The bole is cylindrical, straight, and slightly buttressed.
Hábitat natural
Piptadeniastrum africanum is found in rain forest and transitional formations, often as a solitary emergent tree in farmland and secondary bush.
Distribución natural
West, Central and East Africa, from Senegal to Angola and Uganda.
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 Axial parenchyma lozenge-aliform. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays non-storied. Larger rays more than 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Occasionally septate fibers present. 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
Olor
Unpleasant odor of ammoniac.
Color
The sapwood is light color, it has a thickness of 5 or more cm. The heartwood is light brown to yellow-brown, it is clearly demarcated. The silver figure is fine (barely visible).
Indice de Color (1= Negro, violeta; 7= Amarillo claro, blanco)
5
Grano
The grain is highly and systematically interlocked; special care is needed when drying because of frequent risks of distortion.
Veta
This wood has a somewhat coarse texture.
Brillo
This wood is frequently low in luster.
Durabilidad Natural
Moderately durable to decay. Without preservative treatment, this species can be used only under risk of occasional re-humidification. It is not suited for uses with risks of permanent or long-lasting humidification. Resistant to termites attack. The hear
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
3
Internal growth stresses
This species is reported to have growth stresses.
Contenido de sílice
Silica Content: Negligible content of silica is reported. Amounts over 0.05% may affect wood processing. Silica Value: 0
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)
0.63
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.70
Contracción Tangencial Total (Saturado hasta anhidro) (%)
8.5
Contracción Radial Total (Saturado hasta anhidro) (%)
3.8
Defectos por secado
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: Risks of casehardening and checks Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
Calendario de Secado
FR-13
Estabilidad Dimensional (Contracción Total Tangencial %/Contracción Total Radial %)
2.2
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
994
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
154862
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
583
Resistencia a la compresión perpendicular a la fibra CH12% (kgf/cm²)
76
Cizallamiento radial CH12% (kgf/cm²)
106
Dureza Janka (lados) CH12% (kgf)
611
Dureza Janka (extremos) CH12% (kgf)
707
TRABAJABILIDAD
Aserrado
It is moderately easy to saw.
Corte de chapa rotativa
Not suitable for veneering.
Chapa tranchada
Not suitable for veneering.
Pérdida de filo_romado
Slight blunting effect; ordinary tools can be used for sawing and machining.
Maquinado general
Possible difficulties caused by interlocked grain are reported.
Cepillado
Moderately easy; tools must be cautiously sharpened.
Moldurado
Moderately easy; tools must be cautiously sharpened.
Taladrado
Moderately easy; tools must be cautiously sharpened.
Escopleado, caja y espiga
Moderately easy; tools must be cautiously sharpened.
Clavado
Pre-boring is necessary.
Encolado
Glues well if basic gluing technical rules are followed.
Lijado
Difficult to obtain very good results because of interlocked grain.
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)
EXTERIOR GENERAL, rails, HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, steps, FURNITURE AND CABINETS, common furniture, CONTAINERS, truck bodies, truck flooring
EXTERIOR GENERAL
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Barandilla
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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
MUEBLES Y GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Muebles comunes
- 23 - Handbook of Hardwoods
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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