< Retour MERAWAN (Hopea mengarawan) Version imprimable
MERAWAN (Hopea mengarawan)
Nom commercial
Merawan
Nom scientifique (avec auteur)
Hopea mengarawan Miq.
Famille
Dipterocarpaceae
Noms communs (pays)
Merawan (United States of America); Damar cermin (Indonesia); Damar mata kucing (Indonesia); Tengerawan (Indonesia); Tengerawan (Sumatra); Tekan lampung (Borneo); Wapei (West Irian); Manggachapui (Philippines); Mai takien (Thailand); Merawan (Malaysia); Merawan (United Kingdom); Merawan (Indonesia); Merawan (France); Merawan (Spain); Merawan (Italy); Merawan (Sweden); Merawan (Netherlands); Merawan (Germany); Sengal (Malaysia); Damar lilin (Indonesia); Mang (Sarawak); Light hopea (Papua New Guinea); Sengal (Indonesia); Gagil (Sabah); Selangan (Sabah); Selangan-kasha (Sarawak); Takhian (Thailand); Thingan (Myanmar); Sau (Vietnam)
DESCRIPTION DE L'ARBRE
Description botanique
It is a medium-sized to large tree of up to 40 m tall. The bole is branchless for up to 25 m, sometimes more, with a diameter of up to 90 cm and prominently buttressed. It produces a good quality dammar resin.
Habitat naturel
Scattered throughout lowland mixed dipterocarp forest, this species is an important source of merawan timber.
IDENTIFICATION DU BOIS
Description anatomique du bois
Vessels per mm2 5 to 20. Wood diffuse porous. Tangential diameter of vessel lumina 100 to 200 micras. Vestured pits. Simple perforation plates. Intervessel pits medium, 7 to 10 micras. Vessel-ray pits reticulate and/or foraminate. Simple perforation plates. Inter Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Axial parenchyma confluent. Ray width 1 to 3 cells. Prismatic crystals in the ray cells. Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III).
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The sapwood is slightly differentiated, pale yellow-brown. The heartwood is yellowish when fresh, light to chocolate reddish brown after exposure.
Index de Teinte (1 = Noir, 7 = Jaune clair)
5
Grain
It is straight to somewhat wavy.
Texture
The texture varies from moderately fine to medium
Durabilité naturelle
It is durable and fairly resistant to fungi and insect attack.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
2
Teneur en silice
Silica Content: It is reported containing 0.2% silica. Silica Value: 0.2
Résistance à l'imprégnation
It is very difficult to treat with preservatives.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.75
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.85
Retrait tangentiel total (saturé à 0%TH) (%)
6.1
Retrait radial total (saturé à 0%TH) (%)
2.7
Calendrier de séchage en séchoir recommandé
UK-C; US-T3-C2
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
2.3
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
958
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
141794
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
520
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
51
Dureté Janka (latérale) 12%TH (kgf)
390
Dureté Janka (extrémités) 12%TH (kgf)
518
OUVRABILITÉ
Sciage
Sawing of this species is easy.
Coupe de placage de déroulage
Veneer 1.5 mm thick can be made satisfactorily with a peeling angle of 91 degrees.
Placage tranche
Veneer 1.5 mm thick can be made satisfactorily with a peeling angle of 91 degrees.
Usinage
Machining of this species is reported to be easy.
Rabotage
Planing is reported to be easy.
Perçage
Boring of this species is reported to be easy.
Clouage
This species is reported to have a good nailing behavior.
Collage
It is reported to be easy to glue.
Finissage
It is easy to finish.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
EXTERIOR GENERAL, crossties, HOUSING GENERAL, flooring, frames, steps, CONTAINERS, chemical storage
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
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
Cadres
- 16 - Woods of the World
Marches
- 17 - Tree Conservation Database
CONTENANTS
- 50 - Properties of imported tropical woods
Chemical Storage
- 52 - Propiedades mecanicas y asociadas del pino insigne (Pinus radiata d.don)
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