MALAGANGAI (Potoxylon melagangai)
Trade Name
Malagangai
Scientific Name
Potoxylon melagangai (Symington) Kosterm.
Family
LAURACEAE
Common Names
Malagangai; Belian kebuau (Malaysia); Belian malagangai (Borneo); Melagangai (Malaysia); Belian malagangai (Malaysia); Legangai (Brunei Darussalam); Belian kapok (Malaysia); Tebillian kebuau (Brunei Darussalam)
Scientific Name Synonyms
Eusideroxylon melagangai Symington
Description Of The Tree
Botanical Description
It is an evergreen, small to medium-sized tree up to 25 m tall. The bole is straight and cylindrical, up to 100 cm in diameter, with small, rounded buttresses up to 2 m high or with a mattress of slender roots at base.
Natural Habitat
Pometia pinnata is typical in primary lowland evergreen and mixed dipterocarp forests, up to 300 m of altitude.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Occasionally tyloses common. Vessels per mm2 5 to 20. Occasionally vessels per mm2 less than 6. Vessel-ray pits reticulate and/or foraminate. Simple perforation plates. Intervessel pits large, 10 micras or more. Occasionally apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Occasionally paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Axial parenchyma confluent. 5 to 8 cells per parenchyma strand. 4 to 10 rays per mm (medium). Occasionally larger rays more than 4 seriate. Oil and/or mucilage cells associated with the axial and/or ray parenchyma (idioblasts). Occasionally body ray cells procumbent with mostly 2 to 4 rows of upright and/or square margin Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is brown with a distinct reddish tinge, sharply differentiated from the yellowish sapwood when freshly cut.
Grain
The grain is usually straight.
Texture
Texture is mostly moderately fine and even.
Natural Durability
This species is reported to be very durable.
Natural durability index (1= Very high durability, 7=Vey low durability)
1
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.65
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.72
Total shrinkage Tangential (Saturated to 0%MC) (%)
7.5
Total shrinkage Radial (Saturated to 0%MC) (%)
4.6
Drying Defects
Ease of Drying: Drying is rather slow and sometimes difficult to perform. Drying Defects: Risks of checks and distortions. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.6
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1376
Stiffness (MOE) 12%MC (kgf/cm²)
152850
Compression parallel to fiber 12%MC (kgf/cm²)
703
Shear strength radial 12%MC (kgf/cm²)
143
Janka hardness (side) 12%MC (kgf)
859
Workability
Sawing
Wood of this species is easy to cut.
Planing
This species is easy to plane.
REFERENCED USES
End Uses Summary
EXTERIOR GENERAL, poles, stakes posts, HOUSING GENERAL, flooring, TOOLS, tool handles, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, boats, OTHER AND MUSICAL INSTRUMENTS, shingle
Exterior General
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Poles
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Stake Posts
- 5 - Propriedades fisicas e mecanicas da madeira e do contraplacado de Pinus elliottii
General Housing
- 10 - Silica in Timbers
Flooring
- 14 - Handbook of Hardwoods
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Truck Body
- 53 - Timbers of the New World
Truck Flooring
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Boats
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Other & Musical Instruments
- 63 - Madeiras do Brazil II
Shingles
- 77 - Amazonian Timbers, Characteristics and Utilization Volume I; Tapajós National Forest
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