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THINKADU (Parashorea stellata)
Trade Name
Thinkadu
Scientific Name
Parashorea stellata Kurz
Family
DIPTEROCARPACEAE
Common Names
L[af]ng v[ij]t (Vietnam); Ch[of]lao (Vietnam); Ch[of]chai (Vietnam); Takhian-samphon (Thailand); Pat lang khieo (Thailand); Khaikhieo (Thailand); Mai hao (Laos); Kobe; Gerutu gerutu (Malaysia); Thingadu (Myanmar)
Scientific Name Synonyms
Shorea cinerea Fischer; Parashorea poilanei Tardieu
Description Of The Tree
Botanical Description
It is a medium sized to large tree, up to 45 meters tall but frequently twisted. It is branchless for up to 27 meters, with diameters of up to 145 cm. Buttresses up to 185 cm high or more are also reported.
Natural Habitat
Parashorea stellata occurs in lowland and hill evergreen dipterocarp forests up to 650 m of altitude.
Wood Identification
Anatomic Description Of Wood
Vessels per mm2 5 to 20. Tangential diameter of vessel lumina 200 micras or more (large). Tyloses common. Vascular/vasicentric tracheides present. Vestured pits. Vessels per mm2 less than 6 (rare). Vessel-ray pits reticulate and/or foraminate. Simple perforation Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma confluent. Axial parenchyma aliform. Non-crystals in axial parenchyma cells. Axial parenchyma bands more than 3 cells w 4 to 10 rays per mm (medium). Ray height more than 1 mm. Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Body ray cells pro
Availability
Cites Status
Unrestricted
General Wood Description
Odor
No odor or taste are reported for this species.
Color
The heartwood is very light brown to light bronze, darkening on exposure to deeper brown, not distinctly demarcated from the slightly paler sapwood.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
The grain of the wood is interlocked.
Texture
The texture is moderately coarse and even.
Luster
Planed surfaces are reported to be slightly glossy.
Natural Durability
The wood is considered as non-durable in the tropics in exposed conditions or in contact with the ground, but as moderately in temperate climates.
Natural durability index (1= Very high durability, 7=Vey low durability)
6
Silica Content
Silica Content: No silica is reported for this species.
Resistance To Impregnation
The heartwood is resistant to impregnation with preservatives due to the presence of tyloses in the vessels, but the sapwood is permeable.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.54
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.59
Total shrinkage Tangential (Saturated to 0%MC) (%)
9.8
Total shrinkage Radial (Saturated to 0%MC) (%)
4.2
Recommended Dry Kiln Schedule
JP-1
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.3
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1030
Stiffness (MOE) 12%MC (kgf/cm²)
146000
Compression parallel to fiber 12%MC (kgf/cm²)
568
Workability
Rotary Veneer Cutting
The main use for this species is for veneer and plywood.
Sliced Veneer
The main use for this species is for veneer and plywood.
Blunting Effect
It has a slight blunting effect on the cutting tools.
Machining
It is easy to machine.
Planing
Planing operations are rather easy.
Turning
30
Nailing
Nailing properties are good.
Finishing
It has a good finishing.
Polishing
Wood of this species is easy to polish.
Steam Bending
This species is not suited for bending purposes.
Response To Hand Tools
The wood responds well to hand tools.
REFERENCED USES
End Uses Summary
EXTERIOR GENERAL, HOUSING GENERAL, flooring, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, TURNING, NAVAL CONSTRUCTION, boats, boat deck, OTHER AND MUSICAL INSTRUMENTS, handicrafts, particleboard, paper
Exterior General
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
General Housing
- 10 - Silica in Timbers
Flooring
- 14 - Handbook of Hardwoods
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Cabinet
- 24 - Empire Timbers
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Turning
- 30 - Embassy of Honduras in Japan
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Boats
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Boat Decking
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Other & Musical Instruments
- 63 - Madeiras do Brazil II
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Particleboard
- 80 - Estudio Integral de la Madera para Construcción
Paper
- 82 - Compilation of Data on the Mechanical Properties of Foreign woods (Part 2) Central and South America.
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