DAO (Dracontomelon dao)
Nom commercial
Dao
Nom scientifique (avec auteur)
Dracontomelon dao Merrill & Rolfe
Famille
ANACARDIACEAE
Noms communs (pays)
Dahu besar daum (Indonesia); Sengkuang (Malaysia); Sengkuang (Sabah); Sengkuang (Sarawak); Dahu (Indonesia); Sengkuang (Borneo); Mon (Papua New Guinea); New Guinea walnut (Papua New Guinea); Sarunsab (Sabah); Unkawang (Sarawak); Sengkuang (Malaysia); Maliyan (Philippines); Basuong (Indonesia); Ka-kho (Thailand); Sengkuang (Indonesia); Basuong (West Irian); Dao (Philippines); Sang-kuan (Thailand)
Synonymes du nom scientifique (avec auteurs)
Dracontomelon sylvestre Blume; Dracontomelon puberulum Blume; Dracontomelon mangiferum Blume; Dracontomelon edule (Balnco) Skeels
DESCRIPTION DE L'ARBRE
Description botanique
It is a large tree up to 45 m tall. The bole is branchless for up to 20 m, up to 100 cm in diameter, with narrow buttresses up to 6 m high.
Habitat naturel
Dao occurs in primary or secondary evergreen to semideciduous forests, from the sea level up to 500 m of altitude.
Répartition naturelle
It is widely distributed in lowland New Guinea, New Britain and New Ireland as well as in the Philippines, Malaysia and Indonesia.
IDENTIFICATION DU BOIS
Description anatomique du bois
Tangential diameter of vessel lumina 200 micras or more (large). Tyloses common. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits coarse throughout the ray cell. Intervessel pits large, 10 micras or more. Axial parenchyma lozenge-aliform. Axial parenchyma confluent. 4 to 10 rays per mm (medium). Prismatic crystals in the ray cells. 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.
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Vue macroscopique du bois (plan radiale)
-
Vue microscopique d'une section transversale du bois
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Odeur
It has no taste or odor.
Teinte
The sapwood is pale yellow, clearly defined. The heartwood is walnut brown, grayish-or greenish-yellow.
Index de Teinte (1 = Noir, 7 = Jaune clair)
5
Grain
The grain may be straight or interlocked.
Texture
Texture is reported to be medium to coarse.
Luster
This species is moderate in luster.
Durabilité naturelle
This timber is not resistant to termite or marine borer attack.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
3
Tensions internes de croissance
Tension wood is sometimes present, giving rise to a slight woolly surface on sawn material.
Teneur en silice
Silica Content: It is non-siliceous. Silica Value: 0
Résistance à l'imprégnation
The penetration of both sapwood and heartwood by preservatives evident is unsatisfactory.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.60
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.66
Retrait tangentiel total (saturé à 0%TH) (%)
7.9
Retrait radial total (saturé à 0%TH) (%)
4.0
Défauts dus au séchage
Drying Defects: It is reported that in seasoning the wood is liable to sap-stain and is subject to insect attack.
Calendrier de séchage en séchoir recommandé
JP-25
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
2.0
Calendrier de séchage en séchoir
http://www.tropicaltimber.info/wp-content/uploads/2015/09/KD_Japanese_ENG.pdf
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
1029
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
127986
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
510
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
92
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
112
Dureté Janka (latérale) 12%TH (kgf)
513
Dureté Janka (extrémités) 12%TH (kgf)
569
OUVRABILITÉ
Sciage
It is easy unless hindered by interlocked grain.
Coupe de placage de déroulage
It is useful as decorative veneer, and is easy to peel without pretreatment at a peeling angle of 91 degrees for 1.5-mm thick veneer.
Placage tranche
It is useful as decorative veneer, and is easy to peel without pretreatment at a peeling angle of 91 degrees for 1.5-mm thick veneer.
Usinage
Machining is easy if interlocked grain is not excessive.
Rabotage
Planing of this species is reported to be easy.
Tournage
30
Clouage
This wood is easy to nail.
Collage
Gluing of this species is easy.
Finissage
Wood of this species is easy to finish.
Polissage
This species is reported to be easy to polish.
Compatibilité avec outils manuels
It is easy to work with hand tools.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, flooring, panelling, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, Decorative veneer, TURNING, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, handicrafts, matches, moldings
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
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
Placage tranché
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Tournage
- 30 - Embassy of Honduras in Japan
CONSTRUCTION NAVALE
- 55 - Tropical Timber Atlas of Latin America
AUTRES ET INSTRUMENTS DE MUSIQUE
- 63 - Madeiras do Brazil II
Artisanat
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Allumette
- 71 - Proprietes physiques et mecaniques des bois tropicaux, premier supplement
Moulures
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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