USDA Forest Service
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53705-2398
Wood Technical Fact Sheet
Other Common Names: Odieneze (Gabon).
Distribution: Mbanko (O. zimmermanii) reported in Tanzania and Kenya; Onzang (O. gabonensis) found in Gabon.
The Tree: Reaches a height of 120 to 130 ft; bole up to 80 ft with good form, Onzang is flute trunk diameters 5 to 6 ft.
General Characteristics: Wood whitish to straw colored, sapwood and heartwood not differentiated. Texture coarse; grain irregular.
Weight: Basic specific gravity (ovendry weight/green volume) 0.32; air-dry density 24 pcf.
Mechanical Properties: (2-cm standard)
Moisture content Bending strength Modulus of elasticity Maximum crushing strength
(%) (Psi) (1,000 psi) (Psi)
12% (46) 6,350 825 4,050
Amsler toughness 44 in.-lb at 12% moisture content (2-cm specimen).
Drying and Shrinkage: Dries rapidly with little checking but warp is severe. No information on kiln schedules. Shrinkage green to ovendry: radial 3.2%; tangential 5.4%; volumetric 8.8%.
Working Properties: Springs and splits severely during log conversion; dried stock saws, planes, and nails easily, easy to peel into veneers.
Durability: Wood is vulnerable to attack by decay fungi, stain, and termites. Logs should be converted soon after felling or chemically treated to minimize degrade.
Preservation: Sapwood permeable; heartwood of Mbanko moderately resistant.
Uses: Boxes and crates, veneer, plywood, pulpwood, particleboard.
Additional Reading: (3), (5), (46)