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NYATOH (Palaquium burckii)
Trade Name
Nyatoh
Scientific Name
Palaquium burckii H.J. Lam
Family
Sapotaceae
Common Names
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)
Scientific Name Synonyms
Croixia burckii (H.J. Lam) Baehni
Description Of The Tree
Botanical Description
It is a fairly large tree up to 40 m tall, with a straight, cylindrical bole up to 80 cm in diameter.
Wood Identification
Anatomic Description Of Wood
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.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is pinkish-brown to reddish-brown and only moderately distinct from the lighter sapwood.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
The grain is shallowly interlocked.
Texture
The texture is moderately fine and even.
Natural Durability
It is rated as only moderately durable. It is prone to termite attack and susceptible to fungal attack, but not to powder-post beetles.
Natural durability index (1= Very high durability, 7=Vey low durability)
3
Resistance To Impregnation
It is difficult to impregnate.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.62
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.69
Total shrinkage Tangential (Saturated to 0%MC) (%)
9.0
Total shrinkage Radial (Saturated to 0%MC) (%)
4.4
Drying Defects
Ease of Drying: The timber generally air dries well.
Recommended Dry Kiln Schedule
UK-E; US-T6-D2; JP-11
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.0
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
917
Stiffness (MOE) 12%MC (kgf/cm²)
132920
Compression parallel to fiber 12%MC (kgf/cm²)
526
Shear strength radial 12%MC (kgf/cm²)
46
Janka hardness (side) 12%MC (kgf)
302
Janka hardness (end grain) 12%MC (kgf)
386
Workability
Sawing
Wood of this species is easy to fair. Nyatoh wood is reported to gum up the saw-teeth.
Rotary Veneer Cutting
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.
Sliced Veneer
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.
Blunting Effect
Gum can clog cutters.
Machining
This species is difficult to machine when interlocked grain is present.
Planing
Fibers tear when planing quarter-sawn pieces.
Boring
Boring operations are rather difficult.
Nailing
This wood is difficult to nail.
Gluing
The timber is reported to glue well.
Finishing
It gives a good finish when properly filled.
Staining
Wood of this species is easy to stain.
Polishing
This species is reported to be easy to polish.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, boards, flooring, frames, shutter boards, FURNITURE AND CABINETS, PLYWOOD AND VENEER, OTHER AND MUSICAL INSTRUMENTS, moldings
General Housing
- 10 - Silica in Timbers
Boards
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Flooring
- 14 - Handbook of Hardwoods
Frames
- 16 - Woods of the World
Shutter Boards
- 20 - Prospect: The wood database
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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