USDA Forest Service
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53705-2398
Wood Technical Fact Sheet
Other Common Names: Melefoufou (Ivory Coast), Bro-kpah (Liberia).
Distribution: Tropical West Africa from Guinea to Gabon, mainly in the dense rain forests.
The Tree: Reaches a height of 80 to 100 ft, boles straight and clear, sometimes with low buttresses on a swollen base; trunk diameter 2 ft.
General Characteristics: Wood yellowish white, sometimes with darker stripes; heartwood and sapwood not differentiated. Texture fine; grain straight or interlocked; dull.
Weight: Basic specific gravity (ovendry weight/green volume) 0.70; air-dry density 54 pcf.
Mechanical Properties: (2-cm standard)
Moisture content Bending strength Modulus of elasticity Maximum crushing strength
(%) (Psi) (1,000 psi) (Psi)
12% (40) 18,100 2,170 9,000
12% (44) 18,500 2,640 10,100
Janka side hardness 2,050 lb for dry material. Amsler toughness 178 in.-lb at 12% moisture content (2-cm specimen).
Drying and Shrinkage: Reported to require very careful seasoning. No information on kiln schedules. Shrinkage green to ovendry: radial 7.0%; tangential 9.6%; volumetric 17.2%.
Working Properties: Easy to saw, plane, and finish but hardened cutters are required. Rapid blunting may occur due to the presence of silica. Good steam- bending characteristics.
Durability: Wood is moderately durable; fairly resistant to marine borer attack. Good weathering properties.
Preservation: Heartwood moderately resistant to impregnation; sapwood permeable.
Uses: Heavy construction, flooring, boatbuilding, railroad crossties, poles and piles.
Additional Reading: (3), (40), (44)