< Volver KOTO (Pterygota macrocarpa) Vista Imprimible
KOTO (Pterygota macrocarpa)
Nombre comercial
Koto
Nombre científico (con autor)
Pterygota macrocarpa K.Schum.
Familia
STERCULIACEAE
Nombres Comunes
Koto (Côte d`Ivoire); Ikame (Zaire); Anatolia (Germany); Pterygota (United Kingdom); African pterygota (United Kingdom); Ikema (Zaire); Ake (Gabon); Kakende (Central African Republic); Poroposo (Nigeria); Kefe (Nigeria); Awari (Ghana); Kyere (Ghana); Koto
Nombres científicos sinónimos (con autores)
Pterygota cordifolia A. Chev.
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
The tree may reach a height of 40 m. The bole is rather straight and cylindrical, clear to 13 to 26 m in length, buttressed to 2 m. The trunk diameter attains 70 to 130 cm.
Hábitat natural
Pterygota macrocarpa is a common tree of dry forests. It is common in tropical evergreen and mixed deciduous forests.
Distribución natural
West Africa.
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). Non-vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel Axial parenchyma in continuous tangential lines or fine bands. Axial parenchyma storied. Prismatic crystals in non-chambered axial parenchyma cells. 3 to 4 cells per parenchyma strand. Rays less than 4 per mm (rare). Rays non-storied. Larger rays more than 4 seriate. Prismatic crystals in the ray cells. Heterogeneous rays and/or multiseriate heterogeneous rays. Non-septate fibers. Fibers with simple to minutely bordered pits.
Disponibilidad
Status de protección por CITES
Unrestricted
DESCRIPCIÓN GENERAL DE LA MADERA
Color
The heartwood is creamy white, it is little or not demarcated. The silver figure is large.
Indice de Color (1= Negro, violeta; 7= Amarillo claro, blanco)
7
Grano
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Veta
This species is reported to have a fine to medium texture.
Brillo
This wood is frequently high in luster.
Durabilidad Natural
Not durable; important risks of decay attacks at any processing step, from logs up to final products. It must receive preservative treatment. Sensible to termites attack. The heartwood is sensible to Lyctus attacks.
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
5
Internal growth stresses
No residual stresses are reported in this species.
Contenido de sílice
Silica Content: It is reported to have a negligible amount of silica. Contents over 0.05% may affect wood processing. Silica Value: 0.01
Dificultad para impregnar
Easy to treat with a full penetration of the preservative products using vacuum-pressure method.
PROPIEDADES FÍSICAS DE LA MADERA
Densidad Básica (Peso anhidro/Vol. saturado) (g/cm³)
0.54
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.59
Contracción Tangencial Total (Saturado hasta anhidro) (%)
8.8
Contracción Radial Total (Saturado hasta anhidro) (%)
3.9
Defectos por secado
Ease of Drying: Drying is rather slow and sometimes difficult to perform. Drying Defects: Risks of checks and distortions. Kiln Schedules: The kiln schedule has been tested.
Calendario de Secado
FR-7
Estabilidad Dimensional (Contracción Total Tangencial %/Contracción Total Radial %)
2.3
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
981
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
133923
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
547
Resistencia a la compresión perpendicular a la fibra CH12% (kgf/cm²)
70
Cizallamiento radial CH12% (kgf/cm²)
67
Dureza Janka (lados) CH12% (kgf)
429
Dureza Janka (extremos) CH12% (kgf)
533
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
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.
Doblar al vapor
Steam bending is difficult.
Facilidad para herramientas manuales
No particular problems.
Usos Reportados
USOS FINALES (RESUMEN)
HOUSING GENERAL, beams, joists, boards, frames, steps, panelling, fittings, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, Decorative veneer, PACKING, heavy packing, pallets, OTHER AND MUSICAL INSTRUMENTS, handicrafts, door core, coffin, moldings, cementboard
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
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 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
artesanía
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
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
Cementboard
- 81 - Madeiras da Amazônia: descrição do lenho de 40 espécies ocorrentes na Floresta Nacional do Tapajós
Please Provide Information To View Producer Information