EVEUSS (Klainedoxa gabonensis)
Nom commercial
Eveuss
Nom scientifique (avec auteur)
Klainedoxa gabonensis Pierre
Famille
IRVINGIACEAE
Noms communs (pays)
Kroma (Côte d`Ivoire); Kuma-kuma (Zaire); Ikele (Zaire); Eveuss (Gabon); Eves (Gabon); Eveuss (Equatorial Guinea); Eves (Equatorial Guinea); Kuma-kuma (Congo); Ngon (Cameroon); Usen; Oban ngon; Ngon; Kuma-kuma; Kroma; Kododebu; Eveuss; Bisiabo; Astratoanini; Akoankyere; Mututtu (Uganda); Odudu (Nigeria)
Synonymes du nom scientifique (avec auteurs)
Klainedoxa zenkeri van Tiegh.; Klainedoxa oblongifolia (Engl.) Stapf
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 50 m, with trunk diameters from 100 to 150 cm. The bole is usually straight, clear and cylindrical, up to to 30 m in length. It presents high buttresses.
Habitat naturel
Klainedoxa gabonensis occurs in evergreen forest on sandy soils.
Répartition naturelle
West Africa, from Guinea to Sudan and Uganda.
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). Tyloses thin walled. Non-vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits coa Axial parenchyma in continuous tangential lines or fine bands. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. Over 9 cells per parenchyma strand. Axial parenchyma bands more than 3 cells wide. Axial parenchyma bands under 4 per mm. 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). 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 heartwood is orange-yellow or golden-brown, darkening on exposure to a dark brown with black veining, it is not clearly demarcated.
Index de Teinte (1 = Noir, 7 = Jaune clair)
4
Grain
Straight or sometimes interlocked. Usually interlocked grain is absent or very slight, without any effect on further processing operations.
Texture
This wood has a somewhat medium texture.
Luster
The surface of the wood is naturally low in luster.
Durabilité naturelle
Very durable to decay; without preservative treatment. This species is especially suited for all the uses with risks of permanent or long-lasting humidification. Resistant to termites attack. The heartwood is sensible to Lyctus attacks.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
1
Tensions internes de croissance
For this species no growth stresses are reported.
Teneur en silice
Silica Content: Silica content is negligible. Amounts over 0.05% may affect wood processing. Silica Value: 0.02
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)
0.89
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
1.04
Retrait tangentiel total (saturé à 0%TH) (%)
9.5
Retrait radial total (saturé à 0%TH) (%)
7.6
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-7
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.3
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)
1589
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
260400
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
899
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
136
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
164
Dureté Janka (latérale) 12%TH (kgf)
1367
Dureté Janka (extrémités) 12%TH (kgf)
1341
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
Can be polished without surface preparation.
Compatibilité avec outils manuels
Working with hand tools is difficult.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
EXTERIOR GENERAL, bridges, poles, rails, crossarms, crossties, piers, HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, CONTAINERS, truck bodies, truck flooring
EXTERIOR GENERAL
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Ponts
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Poteaux
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Rampe
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Crosses
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Traverses de chemin de fer
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Piliers
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MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
Pouters
- 11 - Prospect: The wood database
Solives
- 12 - Tropical timbers of the world. Part I-Tropical American Species
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
Carros_camion
- 53 - Timbers of the New World
Wagons
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
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