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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.

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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.

  • Wood Macro Photo Tangential Plane
  • Wood Micro Photo Of Transversal Section

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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