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MUBALA (Pentaclethra macrophylla)
Nom commercial
Mubala
Nom scientifique (avec auteur)
Pentaclethra macrophylla Benth.
Famille
LEGUMINOSAE
Noms communs (pays)
Okpagha (Nigeria); Apara (Nigeria); Ovala (Côte d`Ivoire); Ebé (Gabon); Essiri (Congo); Mubala (Cameroon); Mbalaka (Cameroon); Kombolo (Cameroon); Ebé (Cameroon); Ebaye (Cameroon); Bemba (Cameroon); Wild locust; Ukpakara; Ukpaghan; Ukana; Ugba; Tshibambabamba; Tsaklo; Owala; Ovala; Otiabor; Opaga; Okuw; Okpagha; Oil bean tree; Ogba; Nsangabare; Nkpa; Moulla-panza; Mouala; Mbala; Mba; M`vanza; Lubamba; Kommott; Kombolo; Kenuri; Kekung; Gbiah; Gbangban; Fawei; Fakha; Fai; Fae; Faa; Fa-wuli; Fa; Essiri; Ekuana; Ekuama; Eklo; Ebe; Ebal; Djong-tu; Combolo; Blay-bu; Bemba; Bbiah; Bali; Bala; Atta bean; Atowa; Atewa; Ateba; Atawah; Atawa; Ataa; Apara; An-fal; Althawah; Akpaka; Mubala
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 15 to 40 m, with diameters of 100 cm. The bole is often irregular, unbuttressed or low buttressed, with a fluted base. It may be up to 6 to 10 m in length.
Habitat naturel
Pentaclethra macrophylla occurs in closed forests, along riverbanks. It is dominant in secondary forests.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 150 to 200 micras (medium). White deposits in heartwood vessels. Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel- Axial parenchyma lozenge-aliform. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 2 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Non-septate fibers. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The sapwood is pale grey-brown or white, it has a thickness of 2.5 to 5 cm. The heartwood is red-brown, it is sapwood and heartwood are not always differentiated.
Grain
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Texture
The wood is reported to be frequently medium textured.
Durabilité naturelle
Moderately durable to decay. Without preservative treatment, this species can be used when risks of occasional re-humidification, but it is not suited for uses with risks of permanent or long-lasting humidification.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
3
Teneur en silice
Silica Content: Negligible content of silica is reported. Amounts over 0.05% may affect wood processing. Silica Value: 0.02
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.82
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.95
Défauts dus au séchage
Ease of Drying: Drying is fairly easy; some difficulties could occur when drying too fast. Drying Defects: No particular risks of drying defects, subject to normal drying conditions. Kiln Schedules: The kiln schedule has been tested.
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
1242
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
794
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
115
Dureté Janka (latérale) 12%TH (kgf)
1123
Dureté Janka (extrémités) 12%TH (kgf)
1147
OUVRABILITÉ
Sciage
Sawing of this species requires powerful equipment.
Coupe de placage de déroulage
Not suitable for veneering.
Placage tranche
Not suitable for veneering.
Effet d'émoussement
Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.
Usinage
It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.
Rabotage
Moderately easy; tools must be cautiously sharpened.
Moulurage
Moderately easy; tools must be cautiously sharpened.
Perçage
Moderately easy; tools must be cautiously sharpened.
Mortaisage
Moderately easy; tools must be cautiously sharpened.
Clouage
Pre-boring is necessary.
Collage
Difficult to glue because of high density.
Ponçage
Easy to perform; it gives good results.
Polissage
Can be polished without surface preparation.
Compatibilité avec outils manuels
Working with hand tools is difficult.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
EXTERIOR GENERAL, poles, stakes posts, crossties, HOUSING GENERAL, parquet, FURNITURE AND CABINETS, SPORTS, TOOLS, tool handles, agricultural tools, CONTAINERS, cooperage, truck bodies, truck flooring, NAVAL CONSTRUCTION, boats
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Poteaux
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Piquets
- 5 - Propriedades fisicas e mecanicas da madeira e do contraplacado de Pinus elliottii
Traverses de chemin de fer
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
Parquets
- 15 - Empire Timbers
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
SPORTS
- 38 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
OUTILS
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Outils_manches
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Outils_agric
- 44 - Atlas of Peruvian Woods
CONTENANTS
- 50 - Properties of imported tropical woods
Tonnellerie
- 51 - Recopilacion de propiedades mecanicas de maderas creciendo en Chile
Carros_camion
- 53 - Timbers of the New World
Wagons
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
CONSTRUCTION NAVALE
- 55 - Tropical Timber Atlas of Latin America
Navires
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
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