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DUABANGA (Duabanga grandiflora)

Trade Name

Duabanga

Scientific Name

Duabanga grandiflora (Roxb. ex DC.) Walp.

Family

SONNERATIACEAE

Common Names

Thitkazaw; Thitazaw; Tadetti; Tadet-ko; Shala; Pedada bukit; Myaukugo; Mau-lettanshe; Mai-sa-lao-long; Mai-ka-yong; Ma-u-lettan; Ma-u; Linzin; Lepcha; Lampatia; Laklob; Kokan; Kochan; Khoken; Kaungglaung; Kamaung-yegyi; Jarul-jhalna; Door; Bonderkella; Bolchim; Berembang bukit; Bandorhulla; Banderkanda; Banderhola; Bandarhulla; Baichua; Achung; Magasawih (Malaysia); Ramdala (India); Linkwai (Thailand); Magasawith (Malaysia); Phay-sung (Malaysia); Magas (Sabah); Tagahas (Sabah); Loktob (Philippines); Lampati (India); Phay (Vietnam); Myaukngo (Myanmar); Kalam (Indonesia); Phay (Thailand); Duabanga (Papua New Guinea)

Scientific Name Synonyms

Leptospartion grandiflorum (Roxb. ex DC.) Griff.; Lagerstroemia grandiflora Roxb. ex DC.; Duabanga sonneralioides Buch.-Ham.

Description Of The Tree

Botanical Description

It is a medium-sized tree up to 30 m tall, but sometimes reaching 40 m, with cylindrical bole up to 80 cm in diameter, scarcely buttressed.

Natural Habitat

This species occurs scattered on open sites in hilly areas up to 1,000 m of altitude.

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 distinct 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)

4

Grain

It is straight, rarely interlocked.

Texture

It is moderately porous.

Natural Durability

It is perishable. Blue stain rapidly develops in green timber, insect infestation in the logs is also reported.

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

It is easy to treat with preservatives.

Wood Physical Properties

Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)

0.49

Air-dry Density (Weight and volume at 12%MC) (g/cm³)

0.53

Total shrinkage Tangential (Saturated to 0%MC) (%)

5.3

Total shrinkage Radial (Saturated to 0%MC) (%)

3.3

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 %)

1.6

Wood Chemical Properties

Wood Mechanical Properties

Bending Strength (MOR),12%MC (kgf/cm²)

652

Stiffness (MOE) 12%MC (kgf/cm²)

78565

Compression parallel to fiber 12%MC (kgf/cm²)

372

Workability

Sawing

This species is easy to saw.

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

It is easy if cutters are well sharpened.

Planing

Planing of this species is reported to be easy.

Moulding

Molding of this species is reported to be easy.

Boring

It is easy to bore.

Nailing

This species has good nailing properties.

Gluing

It is reported to be easy to glue.

Sanding

It has a good sanding behavior.

Finishing

Good if filled.

REFERENCED USES

End Uses Summary

HOUSING GENERAL, frames, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, cores, PACKING, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, matches, paper

General Housing
  • 10 - Silica in Timbers
Frames
  • 16 - Woods of the World
Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Furniture, Common
  • 23 - Handbook of Hardwoods
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
Packing
  • 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Shipbuilding
  • 55 - Tropical Timber Atlas of Latin America
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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