BOSSé FONCé (Guarea thompsonii)
Nom commercial
Bossé foncé
Nom scientifique (avec auteur)
Guarea thompsonii Sprague et Hutch.
Famille
MELIACEAE
Noms communs (pays)
Obobo Nekwi (Nigeria); Mutigbanaye (Côte d`Ivoire); Diambi (Germany); Ugbokpo; Tshidiamakeka; Teninini; Sweet cedar; Sidu; Scented mahogany; Ofe; Oboborukin; Obobo-nekwi; Obabonekwi; Nuguata; Nigerian pearwood; Nigerian cedar; Mutigbanaga; Mietandabo; Koguibe; Kaffi; Hapopeya; Dikunze; Diambi; Close grained mahogany; Cedron; Cedar mahogany; Busi; Bo-in-dah; Avellano; Akpaku; Black guarea (United Kingdom); Edoucie (Cameroon); Obobo (Nigeria); Kwabohoro (Ghana); Bosse (Côte d`Ivoire); Diampi (Germany); Diampi (Zaire); Bolon (Kenya); Obo nekwi (Nigeria); Bossé foncé
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 35 to 40 m. The bole is generally unbuttressed, with occasional fluting, up to 20 m in length. The trunk diameter attains 130 up to 150 cm. Log is banned for international trading.(Cameroon)
Habitat naturel
Guarea thompsonii occurs commonly in hilly moist evergreen dense forests, often as a dominant tree. National conservation status in Cote d`Ivoire V, Liberia E.
Répartition naturelle
West Africa
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). Non-vestured pits. Vessels per mm2 10 to 20 (abundant). Simple perforation plates. Vessel-ray pits similar to intervessel Axial parenchyma oblique and/or sinuous. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand. Axial parenchyma bands over 4 per mm. Rays non-storied. Rays commonly 2 seriate. Occasionally silica bodies in the ray cells. 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). Occasionally septate fibers present. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The sapwood is pale color, it has a thickness of 5 to 10 cm. The heartwood is pinkish brown to orange brown, it is clearly demarcated. The silver figure is fine (barely visible).
Grain
The grain is slightly but systematically interlocked.
Texture
This species is reported to have a fine to medium texture.
Durabilité naturelle
Durable to decay; this species can be utilized without preservative treatment for exterior joinery or similar uses. Moderately 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 stresses are reported to be absent.
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)
0.61
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.68
Défauts dus au séchage
Ease of Drying: Drying is moderately easy; some particular care is needed. 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
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)
1184
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
159961
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
673
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
92
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
72
Dureté Janka (latérale) 12%TH (kgf)
565
Dureté Janka (extrémités) 12%TH (kgf)
664
OUVRABILITÉ
Sciage
It is 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
Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.
Usinage
Possible difficulties caused by interlocked grain are reported.
Rabotage
Moderately easy; tools must be cautiously sharpened.
Moulurage
Moderately easy; tools must be cautiously sharpened.
Tournage
30
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 the extracts content.
Ponçage
Easy to perform; it gives good results.
Polissage
Can be polished without surface preparation.
Cintrage à la vapeur
This species can be used for steam bending.
Compatibilité avec outils manuels
No particular problems.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, steps, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, faces, Decorative veneer, TURNING, ornaments, turned furniture, NAVAL CONSTRUCTION, boat deck, port storage, OTHER AND MUSICAL INSTRUMENTS, handicrafts, cigar boxes
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
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
Faces (de placage)
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
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
CONSTRUCTION NAVALE
- 55 - Tropical Timber Atlas of Latin America
Navires_ponts
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Port entreposage
- 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
Artisanat
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Cigares
- 68 - Contribucion al conocimiento de la resistencia mecanica de la madera de peumo
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