ANDOUNG (Monopetalanthus heitzii)
Nom commercial
Andoung
Nom scientifique (avec auteur)
Monopetalanthus heitzii Pellegr.
Famille
LEGUMINOSAE
Noms communs (pays)
N'Douma (France); N'Douma (Gabon); Andoung (Gabon); Ekop (Equatorial Guinea); Andung (Equatorial Guinea); Andjung (Equatorial Guinea); Kikayi (Congo); Zoele (Cameroon); Ekop Zoélé (Cameroon); Ekop Mayo (Cameroon); Andoung
Synonymes du nom scientifique (avec auteurs)
Aphanocalyx heitzii (Pellegr.) Wieringa
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 32 to 40 m. The bole is generally cylindrical and may be up to 20 m in length, with rather pronounced buttresses. The trunk diameter attains 130 to 200 cm.
Habitat naturel
Monopetalanthus heitzii is often found on moist soils along rivers, in swampy or occasionally inundated areas.
Répartition naturelle
Northern parts of Gabon.
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). Vestured pits. Vessels per mm2 6 to 10 (medium). Simple perforation plates. Vessel-ray pits similar to intervessel pits i Occasionally axial parenchyma in marginal or in seemingly marginal bands. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Prismatic crystals in chambered axial parenchyma cells and/o Rays more than 10 per mm (abundant). Rays and/or axial elements irregularly storied. Rays 1 to 2 seriate. Rays exclusively uniseriate. 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 radiale)
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Vue microscopique d'une section transversale du bois
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood is light brown to pinkish brown ; darkens slightly on exposure, it is not clearly demarcated. The silver figure is barely visible.
Index de Teinte (1 = Noir, 7 = Jaune clair)
6
Grain
Interlocked grain is high but not frequent. Special care is needed when drying because of frequent risks of distortion.
Texture
The texture is typically fine to medium.
Luster
The wood luster is reported to be rather low.
Durabilité naturelle
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.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
5
Tensions internes de croissance
Residual growth stresses are absent.
Teneur en silice
Silica Content: Negligible contents of silica are found in timber of this species. Amounts over 0.05% may affect the wood processing. Silica Value: 0.01
Résistance à l'imprégnation
Moderately easy to treat with a partial penetration of the preservative products.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.49
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.53
Retrait tangentiel total (saturé à 0%TH) (%)
6.4
Retrait radial total (saturé à 0%TH) (%)
3.7
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: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
Calendrier de séchage en séchoir recommandé
FR-6
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.7
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)
801
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
122986
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
427
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
50
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
68
Dureté Janka (latérale) 12%TH (kgf)
341
Dureté Janka (extrémités) 12%TH (kgf)
444
OUVRABILITÉ
Sciage
It is easy to saw.
Coupe de placage de déroulage
Suitable for peeling if treated.
Placage tranche
Suitable for peeling if treated.
Effet d'émoussement
Slight blunting effect; ordinary tools can be used for sawing and machining.
Usinage
Possible difficulties caused by interlocked grain are reported.
Rabotage
Easy; no particular problems.
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
No particular problem.
Collage
Glues well if basic gluing technical rules are followed.
Ponçage
Difficult to obtain very good results because of interlocked grain.
Polissage
Can be polished without surface preparation.
Compatibilité avec outils manuels
No particular problems.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, steps, panelling, fittings, shutter boards, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, cores, PACKING, heavy packing, pallets
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
Marches
- 17 - Tree Conservation Database
Panneaux
- 18 - W3TROPICOS Missouri Botanical Garden
Accessoires en bois
- 19 - Silica in Timbers
Volets
- 20 - Prospect: The wood database
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Meubles ordinaire
- 23 - Handbook of Hardwoods
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
Faces (de placage)
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
âmes (de placage)
- 27 - Embassy of Brazil in Japan
EMBALLAGE
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Embal_lourd
- 47 - Arvores Brasileiras
Emballage, palettes
- 48 - The strength properties of timbers
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