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Tree Data
The tree is reported to attain heights of up to 160 feet (49 m) and trunk diameters of up to 120 inches (300 cm).

The boles are reported to be found occasionally over small buttresses and are straight, cylindrical, and clear to about 80 feet (24 m).

Sapwood Color
The sapwood is yellowish-white in color.

Heartwood Color
The heartwood is golden-orange to brown in color. Lighter vessel lines are conspicuous on flat sawn surfaces. Large deposits of calcium carbonate, with darker colored surrounding material are usually present. Yellow bands of soft tissue are reported to form a zig-zag pattern on all surfaces.

The grain is moderately interlocked.

Texture is reported to be moderately coarse and even.

Iroko is reported to be mildly lustrous.

Movement in Service
Properly seasoned timber is reported to be dimensionally stable, and retains its shape well after manufacture.

Natural Durability

The heartwood is reported to be naturally resistant to decay, but is susceptible to attack by dry-wood insects. The sapwood is susceptible to attack by powder-post beetle, but has been reported to be highly resistant to termite attack in Africa. Resistance to Impregnation The heartwood is reported to be highly resistant to impregnation, but the natural durability of the wood is reported to make preservative treatment unnecessary in most cases.

Weathering Properties
The material is reported to possess adequate weathering properties to allow it to be used in exterior applications.


Category Green Dry Unit
Bending Strength 10165 12730 psi
Crushing Strength (Perp.) 1780 psi
Max. Crushing Strength 4915 8140 psi
Static Bending (FSPL) 8050 psi
Impact Strength 28 23 inches
Stiffness 1284 1763 1000 psi
Work to Maximum Load 11 9 in-lbs/in3
Hardness 1540 lbs
Shearing Strength 1550 psi
Toughness 369 in-lbs
Specific Gravity 0.55 0.78
Weight 58 49 lbs/cu.ft.
Density (Air-dry) 42 lbs/cu.ft.
Radial Shrinkage (G->OD) 4 %
Tangential Shrink. (G->OD 6 %


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

a division of Crown-Holdings bvba

Baillet Latourlei 98
2930 Brasschaat

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