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ZINGANA (Microberlinia brazzavillensis)
Nom commercial
Zingana
Nom scientifique (avec auteur)
Microberlinia brazzavillensis A.Chev.
Famille
LEGUMINOSAE
Noms communs (pays)
Zingana (Cameroon); Zebrawood (United Kingdom); Zebrano (United Kingdom); Zebrano (Germany); Zingana (Gabon)
Synonymes du nom scientifique (avec auteurs)
Berlinia brazzavillensis (A. Chev.) Troupin
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 50 m. The bole is usually straight, up to 16 m in length, low buttressed. The trunk diameter attains 130 to 170 cm.
Habitat naturel
Microberlinia brazzavillensis is found in coastal forests. It is a gregarious species, sometimes reported in pure stands along riverbanks. The wild population has been or is inferred to be in decline(50% in 5 years or 2 generations or for a small populati
Répartition naturelle
West Africa, mainly in Gabon and Cameroon.
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). Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits Axial parenchyma in marginal or in seemingly marginal bands. Axial parenchyma lozenge-aliform. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 cells per parenchyma strand. Rays more than 10 per mm (abundant). Rays and/or axial elements irregularly storied. Rays exclusively uniseriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Body ray cells procumbent with one row of upright and/or square marginal Non-septate fibers. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The sapwood is whitish, it has a thickness of 10 cm. The heartwood is pale yellow brown, with thin and numerous dark brown veins, it is 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 texture is typically medium to coarse.
Durabilité naturelle
Moderately durable to decay. Without preservative treatment, this species can be used only under risk of occasional re-humidification. It is not suited for uses with risks of permanent or long-lasting humidification. Moderately resistant to termites attack.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
3
Tensions internes de croissance
Residual stresses are reported to be absent.
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)
0.72
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.81
Retrait tangentiel total (saturé à 0%TH) (%)
14.0
Retrait radial total (saturé à 0%TH) (%)
8.8
Défauts dus au séchage
Ease of Drying: Drying is moderately difficult to difficult; special care is systematically needed. Drying Defects: Risks of checks, casehardening and water pockets Kiln Schedules: The kiln schedule has been tested.
Calendrier de séchage en séchoir recommandé
FR-11
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.6
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)
1109
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
204606
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
624
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
83
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
147
Dureté Janka (latérale) 12%TH (kgf)
827
Dureté Janka (extrémités) 12%TH (kgf)
899
OUVRABILITÉ
Sciage
It is moderately easy to saw.
Coupe de placage de déroulage
Suitable for slicing.
Placage tranche
Suitable for slicing.
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
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 high density.
Ponçage
Easy to perform; it gives good results.
Polissage
Needs pre-coating.
Compatibilité avec outils manuels
Working with hand tools is difficult.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, TOOLS, tool handles, agricultural tools, NAVAL CONSTRUCTION, boat fins, boat deck, boat oars, OTHER AND MUSICAL INSTRUMENTS, handicrafts
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
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
OUTILS
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Outils_manches
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Outils_agric
- 44 - Atlas of Peruvian Woods
CONSTRUCTION NAVALE
- 55 - Tropical Timber Atlas of Latin America
Navires_ponts
- 58 - Guía de Árboles de Bolivia
Navires_ponts
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Navires_rames
- 60 - Amazonian Timbers, Characteristics and Utilization Volume II; Curuá-Una Experimental Forest Station
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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