< Volver IROKO (Milicia excelsa) Vista Imprimible
IROKO (Milicia excelsa)
Nombre comercial
Iroko
Nombre científico (con autor)
Milicia excelsa (Welw.) C.C.Berg
Familia
MORACEAE
Nombres Comunes
Semli (Sierra Leone); Semei (Sierra Leone); Rokko (Nigeria); Semli (Liberia); Semei (Liberia); Odum (Ghana); Iroko (Côte d`Ivoire); iroko (Benin); Kambala (Belgium); Molundu (Zaire); Mokongo (Zaire); Lusanga (Zaire); Kambala (Zaire); Mandji (Gabon); Abang (Gabon); Abang (Equatorial Guinea); Kambala (Congo); Abang (Cameroon); Mvuli (Uganda); Mvule (Uganda); Mvuli (Tanzania); Mvule (Tanzania); Mvuli (Kenya); Mvule (Kenya); Mvuli (Ethiopia); Mvule (Ethiopia); Tule (Mozambique); Mufala (Mozambique); Moreira (Angola); Vai; Ulundu; Uloko-mushinogbon; Ulok; Uklobce; Tule; Toumbohiro noir; Tema; Teak; Ssare; Simli; Sime; Semli; Semei; Sanga; Rokko; Roco; Rock elm; Oroko ulokoodigpe; Oroko; Olwaa; Olia; Ofryio; Oduna; Odum; Odoum; Odji; Obas tree; Ntong; Nsan; Mvule; Muvule; Mutumba; Mucoco; Muberry; Moreira; Moloundou; Mokongo; Mereira; Mbara; Mbala; Mandji; Mamangi; Lusanga; Loko; Logo asagu; Kimurumba; Kambala; Intule; Gutumba; Guh; Guele; Geh; Emang; Elui; Elua; Elowa; Corkwood; Bwagashanga; Bush teak; Bush oak; Bonzo; Bobang; Banghi; Bang; Bakana; Akede; Agui; African teak; African oak; Abang; Iroko
Nombres científicos sinónimos (con autores)
Morus excelsa Welw.; Chlorophora excelsa (Welw.) Benth.
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
The tree is up to 30 to 48 m tall, with diameters up to 150 cm. The commercial lengths vary from 9 to 24 m.
Hábitat natural
Milicia excelsa is widespread at altitudes below 1,000 m, it grows under a variety of conditions. 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 species by EITHE
Distribución natural
It is widespread in tropical and subtropical Africa.
Usos No-maderables
Contains some resins or extracts which could pose problems when machining or finishing.
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). Tyloses thin walled. Non-vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits lar Axial parenchyma in marginal or in seemingly marginal bands. Axial parenchyma aliform. Axial parenchyma confluent. Prismatic crystals in non-chambered axial parenchyma cells. 3 to 4 cells per parenchyma strand. Rays non-storied. Larger rays more than 4 seriate. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Non-septate fibers. Fibers with simple to minutely bordered pits.
Disponibilidad
Status de protección por CITES
Unrestricted
DESCRIPCIÓN GENERAL DE LA MADERA
Color
The sapwood is yellowish white, it has a thickness of 5 to 7.5 cm. The heartwood is yellow brown to dark brown, it is clearly demarcated. The silver figure is fine.
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 is typically medium to coarse.
Brillo
Luster is usually low.
Durabilidad Natural
Because of variable resistance to decay, this species can be only considered as durable to decay; it can be utilized without preservative treatment for exterior joinery or similar uses. Resistant to termites attack. Heartwood is resistant to Lyctus attack
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
2
Internal growth stresses
No residual growth stresses are found.
Contenido de sílice
Silica Content: Silica content is negligible. Amounts over 0.05% may affect wood processing. Silica Value: 0.01
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)
0.59
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.65
Contracción Tangencial Total (Saturado hasta anhidro) (%)
5.5
Contracción Radial Total (Saturado hasta anhidro) (%)
3.6
Calendario de Secado
FR-6
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)
893
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
135725
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
556
Resistencia a la compresión perpendicular a la fibra CH12% (kgf/cm²)
72
Cizallamiento radial CH12% (kgf/cm²)
67
Dureza Janka (lados) CH12% (kgf)
522
Dureza Janka (extremos) CH12% (kgf)
623
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.
Torneado
30
Taladrado
Easy; no particular problems.
Escopleado, caja y espiga
Easy; no particular problems.
Clavado
No particular problem.
Encolado
Difficult to glue because of the extracts content.
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, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, faces, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, CONTAINERS, cooperage, truck bodies, truck flooring, NAVAL CONSTRUCTION, boat deck, port storage, OTHER AND MUSICAL INSTRUMENTS, handicrafts
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
mangos de cuchillos
- 33 - Embassy of Gabon in Japan
Hormas zapato
- 34 - Embassy of Indonesia in Japan
Duelas toneles
- 51 - Recopilacion de propiedades mecanicas de maderas creciendo en Chile
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
CONSTRUCCIÓN NAVAL
- 55 - Tropical Timber Atlas of Latin America
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
artesanía
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Please Provide Information To View Producer Information