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MABIN/PTERYGOTA (Pterygota horsfieldii)
Nom commercial
Mabin/Pterygota
Nom scientifique (avec auteur)
Pterygota horsfieldii (R.Br.) Kosterm.
Famille
STERCULIACEAE
Noms communs (pays)
Impa (Papua New Guinea); Melebu (Malaysia)
Synonymes du nom scientifique (avec auteurs)
Pterygota trinervia K Schumann; Pterygota thwaitesii (Mast.) Alston; Pterygota forbesii F. v. Mueller
DESCRIPTION DE L'ARBRE
Description botanique
It is a deciduous, monoecious, medium-sized to large tree up to 50 m tall. The bole is cylindrical to tapering, up to 120 cm in diameter and branchless for up to 36 m, with thin, small to tall buttresses.
Habitat naturel
It is found in riparian forests and secondary formations. It is a native of Irian Jaya and Papua New Guinea.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Tangential diameter of vessel lumina 200 micras or more (large). Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits small, 7 micras or less. Paratracheal axial parenchyma scanty and/or vasicentric. Occasionally axial parenchyma confluent. Axial parenchyma storied. Prismatic crystals in non-chambered axial parenchyma cells. Occasionally two cells per parenchyma strand. 3 to 4 cells per parenchyma st 4 to 10 rays per mm (medium). Occasionally rays of two distinct sizes. Ray height more than 1 mm. Larger rays more than 4 seriate. Sheath cells. Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Occasionally body ray cells procum Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Odeur
Fresh wood has an unpleasant smell.
Teinte
The sapwood varies from straw to buff, not clearly demarcated. The heartwood is cream to pale brown.
Grain
The grain is reported to be straight or shallowly interlocked.
Texture
Texture is usually medium to coarse.
Durabilité naturelle
Logs are very susceptible to blue-stain, termite and pinhole borer attack, unless rapidly removed from forest or given protective treatment.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
3
Résistance à l'imprégnation
This species can be impregnated fairly easily.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.63
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.70
Retrait tangentiel total (saturé à 0%TH) (%)
10.3
Retrait radial total (saturé à 0%TH) (%)
4.0
Défauts dus au séchage
Ease of Drying: Drying is rather slow and sometimes difficult to perform. Drying Defects: Risks of distortions.
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
2.6
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
917
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
135935
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
418
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
69
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
100
Dureté Janka (latérale) 12%TH (kgf)
505
OUVRABILITÉ
Sciage
The wood has a tendency to tear when quarter sawing boards with interlocked grain.
Coupe de placage de déroulage
Slicing is possible, but it may not be satisfactory due to the presence of harder and softer zones.
Placage tranche
Slicing is possible, but it may not be satisfactory due to the presence of harder and softer zones.
Effet d'émoussement
It is reported to gum up the saw-teeth. The blades must be cleaned frequently.
Rabotage
The response of this species to planing operations is good to fair. It tends to tear on radial boards with interlocked grain.
Moulurage
It can be used for molding with satisfactory results.
Tournage
30
Finissage
It finishes satisfactorily after filling
Cintrage à la vapeur
Steam bending properties are poor.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
EXTERIOR GENERAL, bridges, poles, crossties, HOUSING GENERAL, flooring, steps, panelling, shutter boards, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, TURNING, SPORTS, TOOLS, tool handles, agricultural tools, PACKING, pallets, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, port storage, OTHER AND MUSICAL INSTRUMENTS, handicrafts, shoes, moldings
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Ponts
- 2 - 25 madeiras da amazonia de valor comercial, caracterizacao, macroscopica, usos comuns e indices qualificativos
Poteaux
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
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
Planchers
- 14 - Handbook of Hardwoods
Marches
- 17 - Tree Conservation Database
Panneaux
- 18 - W3TROPICOS Missouri Botanical Garden
Volets
- 20 - Prospect: The wood database
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Armoires
- 24 - Empire Timbers
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
Tournage
- 30 - Embassy of Honduras in Japan
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
Emballage, palettes
- 48 - The strength properties of timbers
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
Port entreposage
- 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
Artisanat
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Chaussures
- 70 - Proprietes physiques et mecaniques des bois tropicaux de l`union francaise
Moulures
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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