LAUBU (Garcinia myrtifolia)
Nom commercial
Laubu
Nom scientifique (avec auteur)
Garcinia myrtifolia A.C.Smith
Famille
Guttiferae
Noms communs (pays)
Laubu (Fiji)
DESCRIPTION DE L'ARBRE
Description botanique
Average bole length is 12 m,mximum 20 m. Genus Garcinia is important as source of edible fruit, producing the popular Mangosteen.Most species are slow-growing.
Habitat naturel
In primary,secondary,open or rocky forests,sometimes on limestone. Found usually above 50 m in Fiji up to 915 m,and in Tonga up to 400 m.
Répartition naturelle
Widespread but not common troughout Malaysia,Indonesia,the Philippines, New Guinea and the Pacific.
IDENTIFICATION DU BOIS
Description anatomique du bois
Vessels per mm2 more than 20 (very abundant). Tangential diameter of vessel lumina 100 to 150 micras (small). Vessels in radial multiples of 2 to 4. Occasionally vessels in radial multiples of 4 or more common. Axial parenchyma in continuous tangential lines (included in reticulate and scalariform). Axial parenchyma confluent.
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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
Teinte
Laubu is yellow to orange-brown in color, sometimes with bright yellow streaking. The sapwood band,50～75 mm wide, is straw to yellow-brown. Dark and knotty cores a feature of some logs.
Index de Teinte (1 = Noir, 7 = Jaune clair)
3
Grain
The grain is usually straight, sometimes wavy.
Texture
Texture is intermediate and uniform.
Durabilité naturelle
Sapwood is susceptible to Lyctus attack. Heartwood is not durable being rate adequate only for hazard 1 end uses. Timber out of ground contact, continuously protected from the weather. Timber liable to pinhole borer and marine borer attack. Sapwood permeable,
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
5
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.65
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.81
Retrait tangentiel total (saturé à 0%TH) (%)
7.7
Retrait radial total (saturé à 0%TH) (%)
2.9
Calendrier de séchage en séchoir recommandé
Fiji-6
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
2.7
Calendrier de séchage en séchoir
http://www.tropicaltimber.info/wp-content/uploads/2015/09/KD_Fiji.pdf
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
1100
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
160000
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
610
OUVRABILITÉ
Sciage
Sawing produces smooth surfaces in the green and air dry condition.
Usinage
It turns well and can be machined satisfactorily with only occasional chipping on some radial faces. Some of the siliceous South-East Asian species may be more difficult to work.
Clouage
Difficult to nail when dry, has very good wearing properties
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, flooring, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, faces, TOOLS, tool handles, agricultural tools, NAVAL CONSTRUCTION, boat deck
Planchers
- 14 - Handbook of Hardwoods
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Armoires
- 24 - Empire Timbers
Faces (de placage)
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Outils_manches
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Outils_agric
- 44 - Atlas of Peruvian Woods
Navires_ponts
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
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