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AMBEROI (Pterocymbium beccarii)
Trade Name
Amberoi
Scientific Name
Pterocymbium beccarii K. Schumann
Family
STERCULIACEAE
Common Names
Po-ikeng (Thailand); Amberoi (Papua New Guinea); Taluto (Sabah); Taluto (Philippines); Papita (Indonesia)
Scientific Name Synonyms
Pterocymbium stipitatum C.T. White & Francis
Description Of The Tree
Botanical Description
It is a large tree up to 50 m tall. The bole is branchless for up to 33 m, 120 cm in diameter. The buttresses are absent or with spur roots or with tall buttresses up to 4 m high.
Natural Habitat
Pterocymbium beccarii is found in lowland rain forest, especially on ridges, or on alluvial or swampy soils, up to 750 m of altitude.
Wood Identification
Anatomic Description Of Wood
Vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits small, 7 mi Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma storied. 3 to 4 cells per parenchyma strand. Rays less than 4 per mm (rare). Rays of two distinct sizes. Ray height more than 1 mm. Sheath cells. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Fibers very thin walled. Fibers with simple to minutely bordered pits. Fibers storied.
Availability
Cites Status
Unrestricted
General Wood Description
Odor
It has no taste or odor.
Color
The sapwood is whitish or yellow, only clearly differentiated when fresh. The heartwood is cream colored.
COLOR INDEX (1=Black, 7=Light yellow,white)
7
Grain
The grain is frequently straight.
Texture
The texture varies from medium to coarse.
Luster
The wood surface is dull.
Natural Durability
It is perishable, risk of blue stain is reported.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Silica Content
Silica Content: It is non-siliceous. Silica Value: 0
Resistance To Impregnation
Stock absorbs preservatives readily.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.35
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.37
Total shrinkage Tangential (Saturated to 0%MC) (%)
7.6
Total shrinkage Radial (Saturated to 0%MC) (%)
2.9
Drying Defects
Ease of Drying: Drying is rather slow and sometimes difficult to perform.
Recommended Dry Kiln Schedule
US-52-53; JP-21
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.6
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
496
Stiffness (MOE) 12%MC (kgf/cm²)
85622
Compression parallel to fiber 12%MC (kgf/cm²)
306
Shear strength radial 12%MC (kgf/cm²)
59
Janka hardness (side) 12%MC (kgf)
161
Workability
Sawing
It is moderately easy to cut, the wood it is somewhat fibrous.
Rotary Veneer Cutting
This timber is reported to be suitable for lamination.
Sliced Veneer
This timber is reported to be suitable for lamination.
Machining
This species is easy to machine.
Planing
Planing is reported to be easy.
Turning
30
Nailing
The nail holding properties are moderate.
Gluing
Gluing behavior is reportedly good.
Finishing
It has a good finishing.
Steam Bending
The steam bending properties are satisfactory.
Response To Hand Tools
This species is easy to work with hand tools.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, shutter boards, FURNITURE AND CABINETS, PLYWOOD AND VENEER, faces, cores, TURNING, PACKING, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, handicrafts, shoes, matches, moldings, paper
General Housing
- 10 - Silica in Timbers
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
Faces
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Cores
- 27 - Embassy of Brazil in Japan
Turning
- 30 - Embassy of Honduras in Japan
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Shoes
- 70 - Proprietes physiques et mecaniques des bois tropicaux de l`union francaise
Matches
- 71 - Proprietes physiques et mecaniques des bois tropicaux, premier supplement
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
Paper
- 82 - Compilation of Data on the Mechanical Properties of Foreign woods (Part 2) Central and South America.
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