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WALIK UKUN (Schoutenia ovata)
Nom commercial
Walik ukun
Nom scientifique (avec auteur)
Schoutenia ovata Korth.
Famille
TILIACEAE
Noms communs (pays)
Walik ukun; Popel thuge (Cambodia); Ach-sat (Cambodia); Ken thao (Laos); Daeng nieo (Thailand); Daeng saeng (Thailand); Daeng samae (Thailand); East Indian meet-wood; Harikukun (Indonesia)
Synonymes du nom scientifique (avec auteurs)
Schoutenia hypoleuca Pierre; Actinophora hypoleuca (pierre) O. Kuntze; Actinophora fragrans Wallich ex R. Br.
DESCRIPTION DE L'ARBRE
Description botanique
It is a small to medium sized tree, up to 35 m tall. The bole is fairly short, up to 60 cm in diameter, sometimes fluted or with buttresses up to 1.7 m high.
Habitat naturel
Schoutenia species sometimes occur gregariously in moist locations in primary rain forests, up to 900 m of altitude.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Vessels per mm2 5 to 20. Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits small, 7 micras or less. Occasionally axial parenchyma in marginal or in seemingly marginal bands. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Occasionally paratracheal axial parenchyma scanty and/or vas 4 to 10 rays per mm (medium). Occasionally rays and/or axial elements irregularly storied. Occasionally larger rays more than 4 seriate. Prismatic crystals in the ray cells. Occasionally body ray cells procumbent with mostly 2 to 4 rows of upright and/or squa Fibers very thick walled. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood is purple-gray-brown to dark purple-brown, not clearly differentiated from the sapwood.
Grain
This species is reported to have typically straight or interlocked grain.
Texture
This species is reported to have a moderately fine texture.
Durabilité naturelle
The wood is moderately durable to very durable, even in contact with the ground or when exposed to the weather.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
4
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.85
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.98
Défauts dus au séchage
Ease of Drying: Drying is fairly easy; some difficulties could occur when drying too fast. 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.
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
1274
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
125846
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
622
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
224
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
138
Dureté Janka (latérale) 12%TH (kgf)
857
Dureté Janka (extrémités) 12%TH (kgf)
999
OUVRABILITÉ
Usinage
Although it is a hard wood it gives good results in machining.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, SPORTS, TOOLS, tool handles, agricultural tools, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, axle, wheel
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
SPORTS
- 38 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
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
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
Essieux
- 73 - Handbook of Hardwoods
Roués
- 75 - Tropenholzer
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