OVENGKOL (Guibourtia ehie)
Nom commercial
Ovengkol
Nom scientifique (avec auteur)
Guibourtia ehie J.Leon.
Famille
LEGUMINOSAE
Noms communs (pays)
Amazakoué (Côte d`Ivoire); Mozambique (United States of America); Amazoue (Côte d`Ivoire); Ehie (Ghana); Mozambque (United States of America); Palissandro (Equatorial Guinea); Ovengkol (Gabon); Anokye (Ghana); Hyeduanini (Ghana); Ovangkol
Synonymes du nom scientifique (avec auteurs)
Copaifera ehie A. Chev.
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 40 m. The bole is occasionally fluted. The trunk diameter attains 120 cm.
Habitat naturel
Guibourtia ehie occurs in moderate densities in different forest types, from closed rain forest to drier semi-deciduous forest. It prefers swampy and periodically inundated forests. It is known or inferred that the harvesting of specimens from the wild fo
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 to 150 micras (small). Vestured pits. Vessels per mm2 6 to 10 (medium). Simple perforation plates. Vessel-ray pits similar to intervessel pits in Axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma lozenge-aliform. Axial parenchyma aliform. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 ce 4 to 10 rays per mm (medium). Rays non-storied. Larger rays more than 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Non-septate fibers. Fibers with simple to minutely bordered pits.
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Vue macroscopique du bois (plan tangentiel)
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Vue microscopique d'une section transversale du bois
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The sapwood is greyish white, it has a thickness of 4 to 7 cm. The heartwood is yellow brown to dark brown, it is clearly demarcated. The silver figure is slightly lustrous.
Index de Teinte (1 = Noir, 7 = Jaune clair)
4
Grain
It has highly interlocked grain.
Texture
The texture is typically fine to medium.
Luster
This species is moderate in luster.
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
Residual growth stresses are absent.
Teneur en silice
Silica Content: Negligible content of silica is reported. Amounts over 0.05% may affect wood processing. Silica Value: 0
Résistance à l'imprégnation
Difficult to treat with only a low penetration of the preservative products.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.73
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.82
Retrait tangentiel total (saturé à 0%TH) (%)
8.0
Retrait radial total (saturé à 0%TH) (%)
3.9
Calendrier de séchage en séchoir recommandé
FR-9
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
2.0
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)
1296
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
218862
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
705
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
98
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
115
Dureté Janka (latérale) 12%TH (kgf)
845
Dureté Janka (extrémités) 12%TH (kgf)
914
OUVRABILITÉ
Sciage
Sawing of this species requires powerful equipment.
Coupe de placage de déroulage
Suitable for slicing.
Placage tranche
Suitable for slicing.
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
Rather difficult; special tools are needed.
Tournage
30
Perçage
Rather difficult; special tools are needed.
Mortaisage
Rather difficult; special tools are needed.
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)
HOUSING GENERAL, boards, flooring, parquet, frames, steps, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, OTHER AND MUSICAL INSTRUMENTS, handicrafts
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
Planches
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Planchers
- 14 - Handbook of Hardwoods
Parquets
- 15 - Empire Timbers
Cadres
- 16 - Woods of the World
Marches
- 17 - Tree Conservation Database
Panneaux
- 18 - W3TROPICOS Missouri Botanical Garden
Accessoires en bois
- 19 - Silica in Timbers
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Meubles luxe
- 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Armoires
- 24 - Empire Timbers
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
Placage tranché
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Tournage
- 30 - Embassy of Honduras in Japan
Ornements
- 31 - Embassy of Colombia in Japan
Ornements
- 32 - Embassy of Cote d`Ivoire in Japan
Manches de couverts
- 33 - Embassy of Gabon in Japan
Formes à chaussures
- 34 - Embassy of Indonesia in Japan
AUTRES ET INSTRUMENTS DE MUSIQUE
- 63 - Madeiras do Brazil II
Artisanat
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
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