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LIMBALI (Gilbertiodendron dewevrei)
Nom commercial
Limbali
Nom scientifique (avec auteur)
Gilbertiodendron dewevrei J.Leon.
Famille
LEGUMINOSAE
Noms communs (pays)
Mbombi (Sierra Leone); Vaa (Côte d`Ivoire); Bembé (Gabon); Abeum à grandes feuilles (Gabon); Epal (Congo); Bemba (Congo); Ligudu (Zaire); Ditshipi (Zaire); Limbali (Zaire); Abeum grandes feuilles (Gabon); Molapa (Central African Republic); Ekobem (Cameroon); Ekpagoi eze (Nigeria); Sehmeh (Liberia)
Synonymes du nom scientifique (avec auteurs)
Macrolobium dewevrei De Wild
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 32 to 50 m, with trunk diameters of 100 to 150 cm. Although it has no buttresses, sometimes there is a slight thickening at the base of the trunk. The bole is straight and cylindrical.
Habitat naturel
Gilbertiodendron dewevrei is found in swampy forests and in dense forests on sandy soil. Also occurs along streams.
Répartition naturelle
West and Central Africa, reported to be abundant in the Democratic Republic of the Congo.
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 Occasionally axial parenchyma in marginal or in seemingly marginal bands. Axial parenchyma lozenge-aliform. Axial parenchyma 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). Occasionally rays and/or axial elements irregularly storied. Rays exclusively uniseriate. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Non-septate fibers. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The sapwood is greyish or yellowish, it has a thickness of 5 to 10 cm. The heartwood is copper brown, sometimes with dark veining, it is clearly demarcated.
Index de Teinte (1 = Noir, 7 = Jaune clair)
4
Grain
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Texture
Texture is usually 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 growth stresses are absent.
Teneur en silice
Silica Content: Silica is present. Amounts over 0.05% may affect wood processing. Silica Value: 0.06
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)
0.82
Retrait tangentiel total (saturé à 0%TH) (%)
9.0
Retrait radial total (saturé à 0%TH) (%)
4.6
Défauts dus au séchage
Ease of Drying: Drying is very slow and difficult to perform; defects are frequent. Drying Defects: Risks of checks and distortions. 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)
1.9
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)
1406
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
191526
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
727
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
102
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
107
Dureté Janka (latérale) 12%TH (kgf)
835
Dureté Janka (extrémités) 12%TH (kgf)
906
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
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
Glues well if basic gluing technical rules are followed.
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)
EXTERIOR GENERAL, rails, HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, steps, panelling, fittings, TURNING, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, boat deck, port storage
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Rampe
- 6 - Physical and mechanical properties of Eucalyptus deglupta Blume grown in Costa Rica
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
Tournage
- 30 - Embassy of Honduras in Japan
Carros_camion
- 53 - Timbers of the New World
Wagons
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
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
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