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DUABANGA (Duabanga moluccana)
Trade Name
Duabanga
Scientific Name
Duabanga moluccana Blume
Family
SONNERATIACEAE
Common Names
Banderbola (Pakistan); Bukag (Philippines); Arek (Philippines); Magas (Malaysia); Kalanggo (Indonesia); Gayawas hutan (Indonesia); Dem chhoeuter (Cambodia); Benuang laki (Indonesia); Berambang (Brunei Darussalam); Loktob (Philippines); Lampati (India); Magas (Sabah); Phay-sung (Malaysia); Kalam (Indonesia); Linkwai (Thailand); Tagahas (Sabah); Myaukngo (Myanmar); Phay (Vietnam); Magasawith (Malaysia); Duabanga (Papua New Guinea); Phay (Thailand); Ramdala (India)
Description Of The Tree
Botanical Description
It is a medium-sized to fairly large tree up to 35 m tall, but sometimes reaching 45 m, with columnar bole up to 100 cm in diameter, not buttressed but slightly fluted at base.
Natural Habitat
It can be found in forests along streams at low altitudes up to 1,200 m and frequently present in regrowth and riverside cultivation areas.
Natural Distribution
It occurs from the Philippines and Sabah to Malay Archipelago, Sulawesi, Moluccas and New Guinea.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Tangential diameter of vessel lumina 200 micras or more (large). Tyloses common. Vestured pits. Vessels per mm2 5 to 20. Vessel-ray pits reticulate and/or foraminate. Simple perforation plates. Intervessel pits large, 10 micras or more. Axial parenchyma lozenge-aliform. Over 9 cells per parenchyma strand. 4 to 10 rays per mm (medium). Ray height more than 1 mm. Rays exclusively uniseriate. Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Odor
It has no taste or odor.
Color
The sapwood varies from light gray to yellowish. The heartwood is light yellow-brown.
COLOR INDEX (1=Black, 7=Light yellow,white)
6
Grain
It has interlocked grain.
Texture
It is moderately porous.
Natural Durability
It is perishable and blue stain rapidly develops in green timber, insect infestation in the log.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Silica Content
Silica Content: It is reported to contain no silica.
Resistance To Impregnation
The sapwood is permeable, the heartwood is moderately resistant to impregnation.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.39
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.42
Total shrinkage Tangential (Saturated to 0%MC) (%)
7.2
Total shrinkage Radial (Saturated to 0%MC) (%)
3.7
Drying Defects
Ease of Drying: Mango is reported to dry well and fairly rapidly with slight seasoning defects. Boards 12 mm thick take 2 to 3 months to air dry. Drying Defects: It is sometimes subject to cupping or bowing, and it may be liable to staining. Kiln Schedules: The wood kiln dries easily by fairly fast schedules.
Recommended Dry Kiln Schedule
UK-K; US-T13-C4S
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.9
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
912
Stiffness (MOE) 12%MC (kgf/cm²)
74896
Compression parallel to fiber 12%MC (kgf/cm²)
397
Compression perpendicular to fiber 12%MC (kgf/cm²)
41
Shear strength radial 12%MC (kgf/cm²)
87
Janka hardness (side) 12%MC (kgf)
206
Janka hardness (end grain) 12%MC (kgf)
261
Workability
Sawing
Cutting resistance is generally low.
Rotary Veneer Cutting
Peeling properties are good but care should be taken to prevent fungal attack when veneer is stacked tightly.
Sliced Veneer
Peeling properties are good but care should be taken to prevent fungal attack when veneer is stacked tightly.
Machining
Machining is easy if cutters are well sharpened.
Planing
Planing operations are rather easy.
Moulding
Molding is reported to be easy.
Boring
It is easy to bore.
Nailing
This wood is easy to nail.
Gluing
Gluing of this species is easy.
Sanding
This species is reported to be easy to sand.
Finishing
To obtain a good result, filling is recommended.
Staining
It is easy to stain.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, boards, frames, FURNITURE AND CABINETS, PLYWOOD AND VENEER, cores, PACKING, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, matches, paper
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
Frames
- 16 - Woods of the World
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Cores
- 27 - Embassy of Brazil in Japan
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Other & Musical Instruments
- 63 - Madeiras do Brazil II
Matches
- 71 - Proprietes physiques et mecaniques des bois tropicaux, premier supplement
Paper
- 82 - Compilation of Data on the Mechanical Properties of Foreign woods (Part 2) Central and South America.
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