< Retour AZOBé (Lophira alata) Version imprimable
AZOBé (Lophira alata)
Nom commercial
Azobé
Nom scientifique (avec auteur)
Lophira alata Banks
Famille
OCHNACEAE
Noms communs (pays)
Azobe (Côte d`Ivoire); Yasua; Umpenek; Umawerek; Red oak; Red ironwood; Prenkebi; Pone; Plu; Parapara; Ozobe; Otugba; Oteng; Okut; Okoka; Okoga; Okoa; Okikopom; Nokue; Ngohou ibenga; Namijin-kadai; N`goule; Meni oil tree; Malah; Liku; Lihos; Kyirebente; Kyirafunti; Kyere; Kunu; Kotublassu; Kokank; Kekrefunde; K`deng; Ironpost; Ipawhaw; Gue; Faboy; Esire; Enwan; Endui; Eleba; Ebba; Bokoka; Belengbe; Bankile; Asore; Akpakpla; Akogo; Akogka; African oak; A koura; Bongossi (Germany); Endwi (Sierra Leone); Aba (Nigeria); Eba (Nigeria); Esore (Côte d`Ivoire); Bakundu (Cameroon); Ekki (United Kingdom); Bonkole (Germany); Akoga (Equatorial Guinea); Bonkole (Congo); Akoga (Gabon); Bongossi (Cameroon); Ekki (Nigeria); Kaku (Ghana); Hendui (Sierra Leone); Azobe
Synonymes du nom scientifique (avec auteurs)
Lophira tholloni Tiegh.; Lophira spatulata Tiegh.; Lophira simplex G. Don; Lophira procera A. Chev.; Lophira macrophylla Tiegh.; Lophira barteri Tiegh.; Lophira africana Banks ex G. Don
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 50 m, with trunk diameters up to 150 cm. The bole is usually straight, clear and cylindrical up to 30 m long. Not buttressed, but sometimes it is swollen at the base.
Habitat naturel
Lophira alata is a pioneer species and occurs abundantly in wet evergreen forest. It is reported to grow in evergreen and moist deciduous forests, freshwater swamp forests, and close to riverbanks. It is known or inferred that the harvesting of specimens
Répartition naturelle
West Africa.
Existence de plantations?
It has been planted in Cote d`Ivoire since 1926; it is a long rotation species for plantation. The duration of the rotation is 50 years, to reach 60 cm in diameter.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). White deposits in heartwood vessels. Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel- Axial parenchyma in continuous tangential lines or fine bands. Prismatic crystals in non-chambered axial parenchyma cells. Prismatic crystals in short chains in chambered axial parenchyma cells. Over 9 cells per parenchyma strand. Axial parenchyma bands more Rays more than 10 per mm (abundant). Rays non-storied. Rays commonly 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 pink, it has a thickness of 5 cm. The heartwood is dark red to purple-brown, white deposits in the pores, it is clearly demarcated.
Index de Teinte (1 = Noir, 7 = Jaune clair)
2
Grain
The grain is slightly but systematically interlocked; special care is needed when drying because of frequent risks of distortion.
Texture
The wood is mostly coarse in texture.
Durabilité naturelle
Durable to decay; this species can be utilized without preservative treatment for exterior joinery or similar uses. Resistant to termites attack. Heartwood is resistant to Lyctus attacks.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
1
Tensions internes de croissance
No growth stresses are reported in this species.
Teneur en silice
Silica Content: Negligible content of silica is reported. Amounts over 0.05% may affect wood processing. Silica Value: 0.03
Résistance à l'imprégnation
Nearly impossible to treat with a too much low penetration of the preservative substances.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.91
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
1.06
Retrait tangentiel total (saturé à 0%TH) (%)
10.3
Retrait radial total (saturé à 0%TH) (%)
7.3
Défauts dus au séchage
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: Risks of distortions when interlocked grain is present. Kiln Schedules: The kiln schedule has been tested.
Calendrier de séchage en séchoir recommandé
FR-13
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.4
Calendrier de séchage en séchoir
http://www.tropicaltimber.info/wp-content/uploads/2015/09/KD_French.pdf
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
1654
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
218336
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
975
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
151
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
148
Dureté Janka (latérale) 12%TH (kgf)
1429
Dureté Janka (extrémités) 12%TH (kgf)
1389
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
Rather difficult; special tools are needed.
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
Needs pre-coating.
Cintrage à la vapeur
Steam bending is difficult.
Compatibilité avec outils manuels
Working with hand tools is difficult.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
EXTERIOR GENERAL, bridges, poles, paling, stakes posts, rails, crossarms, crossties, piers, HOUSING GENERAL, beams, flooring, parquet, CONTAINERS, cooperage, truck bodies, truck flooring
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Ponts
- 2 - 25 madeiras da amazonia de valor comercial, caracterizacao, macroscopica, usos comuns e indices qualificativos
Poteaux
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Pieux de cloture
- 4 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas da bicuiba
Piquets
- 5 - Propriedades fisicas e mecanicas da madeira e do contraplacado de Pinus elliottii
Rampe
- 6 - Physical and mechanical properties of Eucalyptus deglupta Blume grown in Costa Rica
Crosses
- 7 - Maderas latinoamericanas. II, Quercus alata Q. costaricensis y Q. eugeniaefolia
Traverses de chemin de fer
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
Piliers
- 9 - Maderas latinoamericanas. IV, Nectandra sp. Ocotea austinii, Persea sp. aff. vesticula, Persea schiedeana
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
Pouters
- 11 - Prospect: The wood database
Planchers
- 14 - Handbook of Hardwoods
Parquets
- 15 - Empire Timbers
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
Please Provide Information To View Producer Information