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MERSAWA (Anisoptera grossivenia)
Trade Name
Mersawa
Scientific Name
Anisoptera grossivenia v. Slooten
Family
Dipterocarpaceae
Common Names
Merkunyit (Sarawak); Mersawa kunyit (Malaysia); Damar kelasi (Indonesia); Kantooi (Indonesia); Cangal padi (Indonesia); Merbakau (Brunei Darussalam); Benchaloi (Brunei Darussalam); Venven (Vietnam); Krabak (Thailand); Krabak (United Kingdom); Pik (Thailand); Mersawa (Indonesia); Krabak (Spain); Krabak (United States of America); Mersawa (Malaysia); Krabak (France); Phdiek (Cambodia); Pengiran kasar (Sabah); Krabak (Germany); Mersawa (Germany); Palosapis (Philippines); Kaunghmu (Myanmar); Mersawa (Netherlands); Krabak (Netherlands); Mersawa (Papua New Guinea); Krabak (Italy)
Description Of The Tree
Botanical Description
It is a large tree up to 60 m tall. The bole is tall, straight and branchless for 14- to 30 m, up to 145 cm in diameter. The buttresses are of moderate size, spreading out as large surface roots.
Natural Habitat
A lowland dipterocarp forest species found growing on sandy clayey soils.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Tyloses common. Vestured pits. Vessels per mm2 5 to 20. Vascular/vasicentric tracheides present. Simple perforation plates. Intervessel Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma scalariform. Larger rays more than 4 seriate. Sheath cells. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Fibers with distinctly bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The sapwood is not clearly differentiated from the heartwood, which is pale yellow to yellowish brown.
COLOR INDEX (1=Black, 7=Light yellow,white)
6
Grain
This species is reported to have interlocked grain.
Texture
The texture is medium to coarse.
Natural Durability
The natural durability ranges from moderate to perishable. It is rapidly attacked if unprotected.
Natural durability index (1= Very high durability, 7=Vey low durability)
6
Silica Content
Silica Content: It is reported to have silica. Contents over 0.05% may affect wood processing. Silica Value: 0
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)
0.73
Drying Defects
Ease of Drying: Seasoning is reported as good. Drying Defects: Risk of slight checking or twisting.
Recommended Dry Kiln Schedule
JP-2; UK-E
Wood Chemical Properties
Wood Mechanical Properties
Workability
Sawing
The cutting resistance can be reduced by using correct saw profiles and specially hardened saw teeth. Stellite tipped saws are necessary.
Rotary Veneer Cutting
Peeling yields good quality veneer, although the veneer dries slowly and with slight buckling.
Sliced Veneer
Peeling yields good quality veneer, although the veneer dries slowly and with slight buckling.
Blunting Effect
The wood has a severe blunting effect.
Machining
It is easy to work, but if interlocked grain is present sharp cutters are essential.
Planing
The planed surface is smooth when sharp tools are used.
Boring
Boring operations are rather easy.
Nailing
Nailing is reported as easy.
Gluing
Gluing behavior is reportedly good.
Finishing
This species is reported to be easy to finish.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, beams, frames, panelling, FURNITURE AND CABINETS, PLYWOOD AND VENEER, PACKING, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION
General Housing
- 10 - Silica in Timbers
Beams
- 11 - Prospect: The wood database
Frames
- 16 - Woods of the World
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
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
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