TOLA (Gossweilerodendron balsamiferum)
Nom commercial
Tola
Nom scientifique (avec auteur)
Gossweilerodendron balsamiferum Harms
Famille
LEGUMINOSAE
Noms communs (pays)
Otabo (Nigeria); Agba (Nigeria); Otabo (United Kingdom); Agba (United Kingdom); Tola branca (Germany); Agba (Germany); Tola (Zaire); N'tola (Zaire); Emolo (Gabon); Tola (Congo); N'tola (Congo); Sinedon (Cameroon); White tola; Tshibudimbu tshitoke; Pink mahogany; Okimeten; Ntola; Nigerian cedar; Mutsekamambole; Mushilu mutoke; Mupaka; Mpere; Mpele; Moboron; Mboron; Loshi-erin; Emonga; Ditchipi; Dembo; Boana; Agbara; Achi-aro; Achi; N`tola (Zaire); Tola branca (Angola); Tola blanc (Zimbabwe); Tola blanc (Congo); Emongi (Nigeria); Egba (Nigeria); Agba; Tola
Synonymes du nom scientifique (avec auteurs)
Pterygopodium balsamiferum Vermoesen
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of more than 50 m, with trunk diameters up to 170 or even 200 cm. The bole is clear and straight to 26 to 30 m in length and more.
Habitat naturel
Gossweilerodendron balsamiferum grows in mature little-disturbed lowland rainforest. It is known or inferred that the harvesting of specimens from the wild for international trade has, or may have, a detrimental impact on the species by EITHER. Exceending
Répartition naturelle
West and Central Africa, from Nigeria to the Democratic Republic of the Congo.
Usages non ligneux
Contains some resins or extracts which could pose problems when machining or finishing.
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). Vestured pits. Vessels per mm2 6 to 10 (medium). Simple perforation plates. Vessel-ray pits similar to intervessel pits in Axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma lozenge-aliform. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent).
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Vue macroscopique du bois (plan tangentiel)
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Vue microscopique d'une section transversale du bois
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Odeur
Peppered odor.
Teinte
The sapwood is whitish, it has a thickness of 10 cm. The heartwood is pinkish yellow-brown, darkening on exposure, it is not clearly demarcated. The silver figure is fine.
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.
Luster
It is reported to be low in luster.
Durabilité naturelle
Because of its variable resistance it is considered as moderately durable to decay. Without treatment, it can be used when risks of occasional re-humidification; it is not suited for uses with risks of permanent or long-lasting humidification. Sensible to
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
4
Tensions internes de croissance
No residual stresses are reported in this species.
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)
0.48
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.52
Retrait tangentiel total (saturé à 0%TH) (%)
5.4
Retrait radial total (saturé à 0%TH) (%)
2.4
Défauts dus au séchage
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: Risks of casehardening and checks 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-1
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
2.3
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)
754
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
111290
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
408
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
47
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
69
Dureté Janka (latérale) 12%TH (kgf)
326
Dureté Janka (extrémités) 12%TH (kgf)
429
OUVRABILITÉ
Sciage
It is easy to saw.
Coupe de placage de déroulage
Suitable for slicing and peeling.
Placage tranche
Suitable for slicing and peeling.
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
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
Difficult to glue because of the extracts content.
Ponçage
Easy to perform; it gives good results.
Polissage
Needs pre-coating.
Compatibilité avec outils manuels
No particular problems.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, beams, joists, boards, frames, steps, panelling, fittings, shutter boards, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, Decorative veneer, PACKING, heavy packing, pallets, NAVAL CONSTRUCTION, boat deck, port storage, OTHER AND MUSICAL INSTRUMENTS, door core, shingle, coffin, moldings
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
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
Placage tranché
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
EMBALLAGE
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Embal_lourd
- 47 - Arvores Brasileiras
Emballage, palettes
- 48 - The strength properties of timbers
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
âme_porte
- 76 - Descripción General y Anatómica de 105 Maderas del Grupo Andino.
Shingles
- 77 - Amazonian Timbers, Characteristics and Utilization Volume I; Tapajós National Forest
Cercueils
- 78 - Amazonian Timbers for the International Market
Moulures
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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