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RENGAS (Gluta renghas)
Nom commercial
Rengas
Nom scientifique (avec auteur)
Gluta renghas L.
Famille
ANACARDIACEAE
Noms communs (pays)
Kayu rengas (Indonesia); Rangai (Indonesia); Inghas (Indonesia); Rengas tembaga (Indonesia); Rengas hutan (Indonesia); Rengas ayer (Malaysia); Rengas burung (Indonesia); Thayet-thitsi (Myanmar); Rak baan (Thailand); Rengas jitong (Malaysia); Rak khao (Thailand); Rengas merah (Indonesia); Rengas (Italy); Rengas (Spain); Rengas (France); Rengas (United Kingdom); Thitsi (Myanmar); Rengas (Sarawak); Rengas betul (Indonesia); Rengas perau (Indonesia); Rengas (Indonesia); Rengas (Sweden); Borneo rosewood (United Kingdom); Rak (Thailand); Rengas (Germany); Rengas (Malaysia); Son (Vietnam); Rengas (United States of America); Rengas (Netherlands); Gluta (India)
DESCRIPTION DE L'ARBRE
Description botanique
It is a medium-sized to large tree up to 50 m tall, with boles up to 115 cm in diameter, often multiple-stemmed and conically thickened at base. Buttresses are often present. This species yields a latex which is made into black lacquer, it is also poisono
Habitat naturel
Gluta renghas occurs gregariously along river banks in freshwater tidal beaches and in swamp forests without peat formation.
Usages non ligneux
The sap of Rengas contains poisonous compounds which disappear gradually with drying. It might produce an adverse reaction on sensible individuals.
IDENTIFICATION DU BOIS
Description anatomique du bois
Tyloses common. Vessels per mm2 less than 6 (rare). Vessel-ray pits reticulate and/or foraminate. Simple perforation plates. Intervessel pits large, 10 micras or more. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma in narrow bands on lines up to 3 cells wide. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Fibers with distinctly bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Odeur
Odor and taste are indistinct.
Teinte
The sapwood is clearly differentiated, white to pale yellow. The heartwood is dark reddish brown or deep blood red, streaked with darker colored zones.
Index de Teinte (1 = Noir, 7 = Jaune clair)
4
Grain
It is partly straight, partly wavy, interlocked.
Texture
The texture varies from medium to coarse.
Luster
Timber of this species is moderate in luster.
Durabilité naturelle
The sapwood rapidly discolors and infested by insects if unprotected.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
6
Résistance à l'imprégnation
It is easy to treat with preservatives.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.66
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.73
Retrait tangentiel total (saturé à 0%TH) (%)
6.0
Retrait radial total (saturé à 0%TH) (%)
3.2
Défauts dus au séchage
Ease of Drying: Boards of 13 mm and 38 mm thick can be dried in 2 months and 4 months, respectively. Drying Defects: There is a tendency to check, split and warp.
Calendrier de séchage en séchoir recommandé
UK-E
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.9
Calendrier de séchage en séchoir
http://www.tropicaltimber.info/wp-content/uploads/2015/08/KD_British_ENG.pdf
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
925
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
123384
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
520
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
48
Dureté Janka (latérale) 12%TH (kgf)
303
Dureté Janka (extrémités) 12%TH (kgf)
319
OUVRABILITÉ
Sciage
The behavior of this species in sawing is considered to be easy to slightly difficult.
Coupe de placage de déroulage
For good results in slicing, steaming is required.
Placage tranche
For good results in slicing, steaming is required.
Usinage
Machining operations are rather easy, but slightly difficult when dry.
Rabotage
Planing of dry wood is reported to be easy to fair.
Tournage
30
Perçage
Boring operations are fair to difficult.
Clouage
It is easy to nail.
Collage
Gluing behavior is reportedly good.
Finissage
Wood of this species gives a good finish.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, beams, flooring, panelling, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, faces, Decorative veneer, TURNING, TOOLS, tool handles, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, handicrafts
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
Pouters
- 11 - Prospect: The wood database
Planchers
- 14 - Handbook of Hardwoods
Panneaux
- 18 - W3TROPICOS Missouri Botanical Garden
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Meubles luxe
- 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Armoires
- 24 - Empire Timbers
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
Faces (de placage)
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Placage tranché
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Tournage
- 30 - Embassy of Honduras in Japan
OUTILS
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Outils_manches
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
CONSTRUCTION NAVALE
- 55 - Tropical Timber Atlas of Latin America
Artisanat
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
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