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NYATOH (Palaquium burckii)
Nom commercial
Nyatoh
Nom scientifique (avec auteur)
Palaquium burckii H.J. Lam
Famille
Sapotaceae
Noms communs (pays)
Nyatoh (Malaysia); Mayang (Malaysia); Chay (Vietnam); Taban (Malaysia); Riam (Sarawak); Kha-nunnok (Thailand); Nyatoh (Italy); Pali (India); Padang (United Kingdom); Nyatoh (Germany); Nato (Philippines); Balam terung (Netherlands); Nyatoh (Spain); Nyatoh (Sweden); Nyatoh (United Kingdom); Pencil cedar (Papua New Guinea); Nyatoh (United States of America); Nyatoh (France); Nyatoh (Indonesia)
Synonymes du nom scientifique (avec auteurs)
Croixia burckii (H.J. Lam) Baehni
DESCRIPTION DE L'ARBRE
Description botanique
It is a fairly large tree up to 40 m tall, with a straight, cylindrical bole up to 80 cm in diameter.
IDENTIFICATION DU BOIS
Description anatomique du bois
Vessels in diagonal and/or radial pattern. Tyloses common. Vessels per mm2 5 to 20. Vessel-ray pits reticulate and/or foraminate. Simple perforation plates. Intervessel pits medium, 7 to 10 micras. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Axial parenchyma reticulate. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. Body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kribs-I). Fibers with distinctly bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood is pinkish-brown to reddish-brown and only moderately distinct from the lighter sapwood.
Index de Teinte (1 = Noir, 7 = Jaune clair)
5
Grain
The grain is shallowly interlocked.
Texture
The texture is moderately fine and even.
Durabilité naturelle
It is rated as only moderately durable. It is prone to termite attack and susceptible to fungal attack, but not to powder-post beetles.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
3
Résistance à l'imprégnation
It is difficult to impregnate.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.62
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.69
Retrait tangentiel total (saturé à 0%TH) (%)
9.0
Retrait radial total (saturé à 0%TH) (%)
4.4
Défauts dus au séchage
Ease of Drying: The timber generally air dries well.
Calendrier de séchage en séchoir recommandé
UK-E; US-T6-D2; JP-11
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
2.0
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
917
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
132920
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
526
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
46
Dureté Janka (latérale) 12%TH (kgf)
302
Dureté Janka (extrémités) 12%TH (kgf)
386
OUVRABILITÉ
Sciage
Wood of this species is easy to fair. Nyatoh wood is reported to gum up the saw-teeth.
Coupe de placage de déroulage
The fine grain and color make it suitable for veneer. It can be peeled at a 91 degrees peeling angle without pretreatment. Sometimes the wood is figured and then the veneer can be very attractive, especially when radially sliced.
Placage tranche
The fine grain and color make it suitable for veneer. It can be peeled at a 91 degrees peeling angle without pretreatment. Sometimes the wood is figured and then the veneer can be very attractive, especially when radially sliced.
Effet d'émoussement
Gum can clog cutters.
Usinage
This species is difficult to machine when interlocked grain is present.
Rabotage
Fibers tear when planing quarter-sawn pieces.
Perçage
Boring operations are rather difficult.
Clouage
This wood is difficult to nail.
Collage
The timber is reported to glue well.
Finissage
It gives a good finish when properly filled.
Teinture
Wood of this species is easy to stain.
Polissage
This species is reported to be easy to polish.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL, boards, flooring, frames, shutter boards, FURNITURE AND CABINETS, PLYWOOD AND VENEER, OTHER AND MUSICAL INSTRUMENTS, moldings
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
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
Volets
- 20 - Prospect: The wood 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
Moulures
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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