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SIPO (Entandrophragma utile)
Nombre comercial
Sipo
Nombre científico (con autor)
Entandrophragma utile Sprague
Familia
MELIACEAE
Nombres Comunes
Sipo (Côte d`Ivoire); Sipo-Mahagony (Germany); Kalungi (Zaire); Undianuno; Tsimaie tshibu; Tshimaie n`shibu; Timbi; Sapele mahogany; Muyovu; Mufumbi mahogany; Mfumbi; Mebrou; M`vovo; Libuyu; Feather sapele; Efuobrodidwo; Efuo-konkonti; Efuchyewee; Budongo heavy mahogany; Bokoi; Akuk; Afrobrodiju; Kosi-kosi (Gabon); Assie (Cameroon); Okeong (Nigeria); Efuodwe (Ghana); Sipo-mahagoni (Germany); Utile (United Kingdom); Mufumbi (Uganda); Kalungi (Angola); Liboyo (Zaire); Assi (Gabon); Abebay (Equatorial Guinea); Asseng-assie (Cameroon); Utile (Nigeria); Utile (Ghana); Sipo
Nombres científicos sinónimos (con autores)
Pseudocedrella utilis Dawe & Sprague; Pseudocedrela utilis Dawe & Sprague; Entandrophragma roburoides Vermoes.; Entandrophragma macrocarpum A. Chev.
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
The tree grows to a height of more than 50 m, with trunk diameter above up to 200 cm. The bole is straight, cylindrical and clear to 32 m, occasionally fluted. Log is banned for international trading.(Cameroon)
Hábitat natural
Entandrophragma utile grows in moist deciduous primary forests, dry subtypes and transitional formations. There are protected populations and felling limits in various countries. National conservation status in Cote d`Ivoire V, Liberia E.
Distribución natural
West and Central Africa.
Existencia de plantaciones?
It is a long rotation species for plantation. Best results are obtained in evergreen dense forests in comparison with plantations in semi-deciduous forest.
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). Brown-colored deposits in heartwood vessels. Non-vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation pl Axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma in discontinuous tangential lines. Occasionally axial parenchyma storied. Prismatic crystals in non-chambered axial parenchy 4 to 10 rays per mm (medium). Occasionally rays storied. Rays 1 to 4 seriate. Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). 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 pinkish white, it has a thickness of 2 to 6 cm. The heartwood is red brown, slightly purplish, it is clearly demarcated. The silver figure is medium.
Indice de Color (1= Negro, violeta; 7= Amarillo claro, blanco)
4
Grano
The grain is slightly but systematically interlocked; special care is needed when drying because of frequent risks of distortion.
Veta
Texture is reported to be fine to medium.
Brillo
It is reported to be moderate in luster.
Durabilidad Natural
Because of its variable resistance it is considered as moderately durable to decay. Without treatment, it can be used when risks of occasional re-humidification; it is not suited for uses with risks of permanent or long-lasting humidification. Moderately
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
4
Internal growth stresses
Residual growth stresses are absent.
Contenido de sílice
Silica Content: Negligible contents of silica are found in timber of this species. Amounts over 0.05% may affect the wood processing. Silica Value: 0.02
Dificultad para impregnar
Nearly impossible to treat with a too much low penetration of the preservative substances.
PROPIEDADES FÍSICAS DE LA MADERA
Densidad Básica (Peso anhidro/Vol. saturado) (g/cm³)
0.56
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.62
Contracción Tangencial Total (Saturado hasta anhidro) (%)
6.4
Contracción Radial Total (Saturado hasta anhidro) (%)
4.6
Defectos por secado
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: No particular risks of drying defects, subject to normal drying conditions. Kiln Schedules: The kiln schedule has been tested.
Calendario de Secado
FR-6
Estabilidad Dimensional (Contracción Total Tangencial %/Contracción Total Radial %)
1.4
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
930
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
134984
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
568
Resistencia a la compresión perpendicular a la fibra CH12% (kgf/cm²)
74
Cizallamiento radial CH12% (kgf/cm²)
74
Dureza Janka (lados) CH12% (kgf)
469
Dureza Janka (extremos) CH12% (kgf)
573
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
Rather difficult; special tools are needed.
Torneado
30
Taladrado
Rather difficult; special tools are needed.
Escopleado, caja y espiga
Rather difficult; special tools are needed.
Clavado
No particular problem.
Encolado
Difficult to glue because of the extracts content.
Lijado
Easy to perform; it gives good results.
Sacar lustre
Can be polished without surface preparation.
Doblar al vapor
Steam bending is difficult.
Facilidad para herramientas manuales
No particular problems.
Usos Reportados
USOS FINALES (RESUMEN)
HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, steps, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, faces, Decorative veneer, TURNING, ornaments, turned furniture, NAVAL CONSTRUCTION, boats, boat hulls, boat deck, port storage, OTHER AND MUSICAL INSTRUMENTS, moldings
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
MUEBLES Y GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Muebles finos
- 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Gabinetes
- 24 - Empire Timbers
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
Torneado
- 30 - Embassy of Honduras in Japan
artículos torneados
- 31 - Embassy of Colombia in Japan
Artículos torneados
- 32 - Embassy of Cote d`Ivoire in Japan
CONSTRUCCIÓN NAVAL
- 55 - Tropical Timber Atlas of Latin America
Botes
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Botes_cascos
- 57 - Estadísticas de Aprovechamiento, Exportación y comercialización Nacional de Productos Forestales
Botes_cubierta
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Puertos_estantería
- 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
Molduras
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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