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PUNAH (Tetramerista glabra)
Nom commercial
Punah
Nom scientifique (avec auteur)
Tetramerista glabra Miq.
Famille
THEACEAE
Noms communs (pays)
Punah (Indonesia); Amat (Myanmar); Kayu hujan (Sarawak); Tuyot (Sabah); Punal (Indonesia); Punah (Malaysia); Ponga (Malaysia); Peda (Malaysia); Amat (Sarawak); Punah (United Kingdom); Bangkalis (Indonesia); Entuyut (Sarawak); Bang kalis (Indonesia)
DESCRIPTION DE L'ARBRE
Description botanique
It is a medium-sized to fairly large tree up to 40 m tall, and up to 100 cm in diameter. The bole is straight and branchless up to 15 m, without distinct buttresses but ridged and fluted at the base.
Habitat naturel
Tetramerista glabra can be found in coastal swamp forest and occasionally in kerangas. It prefers strongly acidic soils.
Répartition naturelle
It is distributed in Malay Peninsula, Borneo, Sumatra.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Occasionally vessels in radial multiples of 4 or more common. Tangential diameter of vessel lumina 200 micras or more (large). Colored deposits in heartwood vessels. Vessels per mm2 5 to 20. Simple perforation plates. Vessel-ray pits simila Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. 4 to 10 rays per mm (medium). Sheath cells. Body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kribs-I). Fibers very thick walled. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Odeur
It has an unpleasant smell, when freshly cut, caused by pentosan contents.
Teinte
The sapwood is yellowish brown, not clearly defined when green. The heartwood ranges from straw-colored to yellowish brown, varying partly to pink and to light brown.
Index de Teinte (1 = Noir, 7 = Jaune clair)
5
Grain
It is mostly straight, occasionally slightly spiral-grown.
Texture
The texture varies from fine to medium.
Durabilité naturelle
It is moderately durable, the sapwood is prone to Lyctus and blue stain attack.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
3
Résistance à l'imprégnation
The sapwood is permeable, the heartwood is moderately resistant or resistant to impregnation.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.69
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.77
Retrait tangentiel total (saturé à 0%TH) (%)
10.7
Retrait radial total (saturé à 0%TH) (%)
6.1
Défauts dus au séchage
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: Risks of 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
UK-C; US-T3-C2
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.8
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
849
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
150901
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
476
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
60
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
99
Dureté Janka (latérale) 12%TH (kgf)
448
OUVRABILITÉ
Sciage
Sawing of this species is easy, but the saw teeth may become clogged with resin.
Effet d'émoussement
Gumming up of the saw-blade may cause a moderate blunting effect.
Usinage
Wood processing is reported to be easy.
Perçage
Boring is reported to be easy.
Clouage
Nailing causes splitting, pre-bore is needed.
Collage
This species is easy to glue.
Finissage
Considerable sanding, filling and cleaning of resin are necessary.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
EXTERIOR GENERAL, poles, stakes posts, crossties, HOUSING GENERAL, beams, joists, boards, flooring, frames, FURNITURE AND CABINETS, SPORTS, TOOLS, tool handles, agricultural tools, PACKING, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Poteaux
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Piquets
- 5 - Propriedades fisicas e mecanicas da madeira e do contraplacado de Pinus elliottii
Traverses de chemin de fer
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
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
Cadres
- 16 - Woods of the World
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
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
EMBALLAGE
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
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
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