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Afrika

Okan

Tree Data
The tree is reported to be large, maturing to heights of 180 to 200 feet (55 to 60 m), with trunk diameters of up to 8 to 10 feet (2.5 to 3 m), but averaging about 36 to 48 inches (90 to 120 cm).

Buttresses tend to be short, and are seldom more than 3 feet (1.0 m) high. Boles are typically well-formed, and are clear to about 80 feet (25 m).

Sapwood Color
The sapwood is described as pinkish or reddish when freshly cut, but it loses this color and becomes grayish brown with lighter and darker stripes. It is often distinctly differentiated from the heartwood, and is 2 to 3 inches (5 to 7.5 cm) wide.

Heartwood Color
Heartwood is initially yellow to golden brown in color, usually with a slight greenish cast. The color matures upon exposure to reddish-brown.

Grain
Grain is reported to be very irregular and closely interlocked, producing an attractive stripe or roey figure on quartered surfaces.

Texture
The wood has a moderate texture, and is reported to have a waxy appearance and feel.

Luster
The timber is reported to be lustrous.

Odor
Freshly-cut wood is reported to have an unpleasant smell. Seasoned wood has no discernible odor or taste.

Natural Durability
The heartwood is reported to have high natural resistance to attack by decay fungi and termites. Sapwood is not durable and is reported to be readily attacked by powder-post beetle. The wood is reported to resist attack by marine-borers.

Weathering Properties
The timber is reported to have excellent weathering qualities, and has high resistance to wear. Although the wood is considered to be highly suitable for flooring, it is reported to be very difficult to machine. Resistance to Impregnation The heartwood is reported to be unresponsive to preservative treatment, and the sapwood is difficult to treat.

Substitutes
The timber is reported to be very hard and heavy, and has been suggested as a potential substitute for Lignum-vitae.

Comments
Strength properties are reported to be mid-way between those of European beech (Fagus ) and Greenheart (Ocotea ).

 

Category Green Dry Unit
Bending Strength 13965 19285 psi
Max. Crushing Strength 7900 11885 psi
Stiffness 1979 2493 1000 psi
Work to Maximum Load 10 13 in-lbs/in3
Hardness 2780 lbs
Shearing Strength 2850 psi
Specific Gravity 0.80
Weight 74 58 lbs/cu.ft.
Density (Air-dry) 60 lbs/cu.ft.
Radial Shrinkage (G->OD) 6 %
Tangential Shrink. (G->OD 9 %
Volumetric Shrink. (G->OD 13 %

Crown-Wood

Crown-Wood is a division of Crown-Holdings bvba, a registered company in Belgium active in the import/export & trading of all kinds of Tropical & Exotic Hardwoods (from South-East Asia, West Africa and South-America). 

Crown-Holdings bvba

Crown-Holdings bvba has the following divisions:

Contact details

Crown-Wood
a division of Crown-Holdings bvba

Baillet Latourlei 98
2930 Brasschaat
Belgium

E-mail: info@crown-wood.be
Telephone: +32 3 480 10 14
Fax: +32 3 605 48 53