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CELTIS (Celtis rigescens)
Nom commercial
Celtis
Nom scientifique (avec auteur)
Celtis rigescens (Miq.) Planch
Famille
ULMACEAE
Noms communs (pays)
Asin-asin (Indonesia); Rempelas (Indonesia); Mempelas bulan (Malaysia); Ainam (Indonesia)
Synonymes du nom scientifique (avec auteurs)
Celtis sumatrana (Miq.) Planch; Celtis nymanii K. Schumann; Celtis asperifolia Merr.
DESCRIPTION DE L'ARBRE
Description botanique
Celtis trees can reach up to 45 m, with straight and cylindrical boles, up to 100 cm of diameter. The buttresses are absent or up to 3 m high.
Habitat naturel
Celtis rigescens grows in lowland primary and secondary forests.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Occasionally tangential diameter of vessel lumina 200 micras or more. 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 paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Occasionally axial parenchyma confluent. Occasionally prismatic crystals in non-chambered axial parenchyma cells. 5 to 8 cells per parenchyma strand. Occasionally a Occasionally rays of two distinct sizes. Larger rays more than 4 seriate. Prismatic crystals in the ray cells. Occasionally body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kribs-I). Body ray cells procumbent with mostly 2 t Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Odeur
The wood has a strong fetid odor when fresh.
Teinte
The heartwood is usually pale brown to pale yellow-brown, moderately distinct to indistinct from the white or pale sapwood.
Index de Teinte (1 = Noir, 7 = Jaune clair)
5
Grain
The grain is usually interlocked, sometimes straight.
Texture
The texture is fine to moderately fine, sometimes moderately coarse.
Durabilité naturelle
The wood is readily attacked by fungi and insects when exposed to the weather or in contact with the ground.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
5
Tensions internes de croissance
Tension wood may occur and cause twisting and warping.
Résistance à l'imprégnation
Celtis is reported to be permeable to preservatives.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.59
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.66
Retrait tangentiel total (saturé à 0%TH) (%)
8.1
Retrait radial total (saturé à 0%TH) (%)
5.1
Défauts dus au séchage
Ease of Drying: Shrinkage of the wood during air drying is low.
Calendrier de séchage en séchoir recommandé
JP-24; UK-H
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.6
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
871
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
99309
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
407
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
41
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
117
Dureté Janka (latérale) 12%TH (kgf)
328
Dureté Janka (extrémités) 12%TH (kgf)
404
OUVRABILITÉ
Effet d'émoussement
Wood of this species produces a moderate blunting effect.
Usinage
It is moderately easy to work if it is free of tension wood. Sometimes difficult due to crystalline deposits, which blunt tools readily.
Rabotage
It usually gives a rough surface due to interlocked grain.
Cintrage à la vapeur
The wood is suitable for bent work.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, flooring, frames, steps, FURNITURE AND CABINETS, PLYWOOD AND VENEER, BENDING, tennis rackets, TOOLS, tool handles, PACKING, NAVAL CONSTRUCTION, boat deck, port pillar, port storage, OTHER AND MUSICAL INSTRUMENTS, moldings
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
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
Résistance à la flexion
- 35 - Embassy of Myanmar in Japan
Raquettes de tennis
- 37 - 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)
EMBALLAGE
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
CONSTRUCTION NAVALE
- 55 - Tropical Timber Atlas of Latin America
Navires_ponts
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Ports piliers
- 61 - Manual de Diseño para Maderas del Grupo Andino
Port entreposage
- 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
Moulures
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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