N`TOM (Pachypodanthium staudtii)
Nom commercial
N`tom
Nom scientifique (avec auteur)
Pachypodanthium staudtii Engl. et Diels
Famille
ANNONACEAE
Noms communs (pays)
Anioukéli (Côte d`Ivoire); Ntom (Gabon); Touom (Congo); Mbalinga (Central African Republic); Ntombé (Cameroon); Ntoma (Cameroon); Ntom (Cameroon); Molombo (Cameroon); Zree-chu; Pae-aduasa; Okyira; Okianga; Ntom; N`tom; Gpaladio; Fale; Djirrowa-tue; Aniouketi
Synonymes du nom scientifique (avec auteurs)
Uvaria staudtii Engler & Diels; Pachypodanthium staudtii var. letestui Pellegr.; Pachypodanthium barteri (Benth.) Hutch. & Dalziel; Anona barteri Benth.
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 30 m. The bole is cylindrical, unbuttressed, straight, and may be up to 20 m. The trunk diameter attains 70 to 100 cm.
Habitat naturel
Pachypodanthium staudtii is usually found in small groups. It occurs in dense riparian forests, preferably on sandy or swampy surfaces.
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). Non-vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel Axial parenchyma scalariform. Non-crystals in axial parenchyma cells. 5 to 8 cells per parenchyma strand. Axial parenchyma bands over 4 per mm. Rays less than 4 per mm (rare). Rays non-storied. Larger rays more than 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Oil and/or mucilage cells associated with the axial and/or ray parenchyma (idioblasts). Non-septate fibers. Fibers with simple to minutely bordered pits.
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Vue macroscopique du bois (plan tangentiel)
-
Vue microscopique d'une section transversale du bois
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood is red brown or yellow brown with an occasional olive tinge and stripes, it is not clearly demarcated.
Index de Teinte (1 = Noir, 7 = Jaune clair)
5
Grain
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Texture
The wood is typically fine in texture.
Durabilité naturelle
Not durable; important risks of decay attacks at any processing step, from logs up to final products. It must receive preservative treatment. Moderately resistant to termites attack.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
5
Résistance à l'imprégnation
Easy to treat with a full penetration of the preservative products using vacuum-pressure method.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.68
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.76
Retrait tangentiel total (saturé à 0%TH) (%)
8.9
Retrait radial total (saturé à 0%TH) (%)
4.6
Défauts dus au séchage
Ease of Drying: Drying is moderately difficult to difficult; special care is systematically needed. Drying Defects: Risks of checks and distortions. Kiln Schedules: The kiln schedule has been tested.
Calendrier de séchage en séchoir recommandé
FR-3
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.9
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)
1304
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
157790
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
781
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
113
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
62
Dureté Janka (latérale) 12%TH (kgf)
724
Dureté Janka (extrémités) 12%TH (kgf)
809
OUVRABILITÉ
Sciage
It is moderately easy to saw.
Coupe de placage de déroulage
Suitable for slicing, also suitable for peeling if treated.
Placage tranche
Suitable for slicing, also suitable for peeling if treated.
Effet d'émoussement
Slight blunting effect; ordinary tools can be used for sawing and machining.
Usinage
Machining of this species is reportedly easy.
Rabotage
Easy; no particular problems.
Moulurage
Easy; no particular problems.
Tournage
30
Perçage
Easy; no particular problems.
Mortaisage
Easy; no particular problems.
Clouage
Pre-boring is necessary.
Collage
Glues well if basic gluing technical rules are followed.
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, flooring, parquet, fittings, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, TURNING, PACKING, CONTAINERS, cooperage, OTHER AND MUSICAL INSTRUMENTS, handicrafts
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
Planchers
- 14 - Handbook of Hardwoods
Parquets
- 15 - Empire Timbers
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.
Armoires
- 24 - Empire Timbers
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
Tournage
- 30 - Embassy of Honduras in Japan
EMBALLAGE
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
CONTENANTS
- 50 - Properties of imported tropical woods
Tonnellerie
- 51 - Recopilacion de propiedades mecanicas de maderas creciendo en Chile
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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