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KEMPAS (Koompassia malaccensis)
Nom commercial
Kempas
Nom scientifique (avec auteur)
Koompassia malaccensis Maing.
Famille
LEGUMINOSAE
Noms communs (pays)
Toealang ajam; Thongbeng; Tanggaris; Pa; Oempas; Njari; Mengris; Menggaris; Kampas; Garis; Enggaris; Toemaling (Indonesia); Kempas (United Kingdom); Kempas (Malaysia); Kempas (Sarawak); Menggris (Sarawak); Menggeris (Indonesia); Yuan (Thailand); Kempas (Papua New Guinea); Impas (Sabah)
DESCRIPTION DE L'ARBRE
Description botanique
It is a very large tree up to 60 m tall with columnar bole on average 60 cm in diameter but sometimes up to 210 cm, and large buttresses.
Habitat naturel
This very large tree is found in freshwater peat-swamp forest, usually below 150 m, but it is reported up to 600 m of altitude.
Répartition naturelle
It spread mainly in Malaysia and Indonesia; throughout lowland forests in rather swampy areas and also on hillsides.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Tangential diameter of vessel lumina 200 micras or more (large). Tyloses common. Vessels per mm2 5 to 20. Simple perforation plates. Intervessel pits large, 10 micras or more. Paratracheal axial parenchyma scanty and/or vasicentric. Occasionally prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand. 4 to 10 rays per mm (medium). Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Septate fibers present. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The sapwood is light yellowish to white, clearly differentiated. The heartwood is pink when fresh, darkens to light orange-red to deep brown.
Index de Teinte (1 = Noir, 7 = Jaune clair)
4
Grain
The grain is reported to vary. It is straight, occasionally interlocked or wavy.
Texture
It is fairly coarse.
Durabilité naturelle
The heartwood is durable in temperate climates, but in tropical climates it is moderately durable.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
4
Teneur en silice
Silica Content: It is reported to contain 0.1% silica. Silica Value: 0.1
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)
0.79
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.91
Retrait tangentiel total (saturé à 0%TH) (%)
6.6
Retrait radial total (saturé à 0%TH) (%)
4.8
Défauts dus au séchage
Ease of Drying: The wood air dries readily without much degrade. Boards 25 mm thick can be kiln dried to 12% moisture content in about 2 days. Drying Defects: Kiln drying is reported to be good, but occasional end-splitting and twisting may occur. Kiln Schedules: A temperature of 60 to 70 degrees gives good results. A high-humidity treatment is recommended after drying.
Calendrier de séchage en séchoir recommandé
UK-E; US-T6-D2
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.4
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
1433
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
192600
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
740
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
163
Dureté Janka (latérale) 12%TH (kgf)
761
OUVRABILITÉ
Sciage
Sawing of this wood is reported to be fair to difficult.
Coupe de placage de déroulage
Good veneer of 1.5 mm thick can be made at a peeling angle of 92 degrees without pretreatment.
Placage tranche
Good veneer of 1.5 mm thick can be made at a peeling angle of 92 degrees without pretreatment.
Effet d'émoussement
Blunting of saw-teeth is moderate to severe.
Usinage
It is somewhat difficult to machine and turn due to the interlocked grain and fibrous texture.
Rabotage
When planing, the cutting angle should be reduced to 20 degrees to avoid tearing.
Tournage
30
Perçage
It is difficult to bore.
Clouage
This wood is difficult to nail. Pre-boring is recommended.
Finissage
Filling is advisable.
Teinture
It has a good staining.
Polissage
It has a good polishing.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
EXTERIOR GENERAL, bridges, poles, crossties, HOUSING GENERAL, beams, joists, boards, flooring, frames, FURNITURE AND CABINETS, PLYWOOD AND VENEER, TURNING, SPORTS, TOOLS, tool handles, agricultural tools, PACKING, CONTAINERS, cooperage, truck bodies, truck flooring, NAVAL CONSTRUCTION
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
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.
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
CONTENANTS
- 50 - Properties of imported tropical woods
Tonnellerie
- 51 - Recopilacion de propiedades mecanicas de maderas creciendo en Chile
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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