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Turning Stock $ 18.00 Lbs
Slabs & Blocks currently available - Please Inquire
Assumed, Wood Working Properties & Specifications
Other Common Names: Doussie (Cameroons), Apa, Aligna (Nigeria), Mkora, Mkola, Mbambakofi (Tanzania), Chanfuta, Mussacossa (Mozambique), Beyo, Meli, Azza (Uganda).
Distribution: West, Central, and East Africa. Occur in the dense evergreen forests but also common in the savanna and coastal forests of East Africa.
The Tree: Reaches best development on moist sites with heights of 80 to 120 ft and clear boles 30 to 50 ft; trunk diameters 3 to 5 ft and more; large irregular buttresses sometimes present.
General Characteristics: Heartwood reddish brown after exposure; sapwood pale straw to whitish, well defined. Texture moderate to coarse; grain straight to interlocked; medium luster; without characteristic odor or taste. Some pores contain a yellow dyestuff which, under moist conditions, can discolor textiles, paper, or other cellulosic materials.
Weight: Basic specific gravity (ovendry weight/green volume) 0.67; air-dry density 51 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 1,900 11,490
12% (56) 16,640 1,510 10,030
Janka side hardness 1,770-1,850 lb for dry material.
Drying and Shrinkage: Seasons satisfactorily but slowly with little or no degrade. Kiln schedule T6-D2 is suggested for 4/4 stock and T3-D1 for 8/4. Shrinkage green 12% moisture content: radial 1.0%; tangential 1.5%. Movement in service is rated as small.
Working Properties: Rather difficult to saw and machine because of rapid dulling of saw teeth and cutters but works to a smooth finish; some tearing of grain on radial faces. Difficult to stain where pores contain yellow deposits. Classified moderate in wood bending properties. Dust may be irritating. Difficult to glue.
Durability: Heartwood is rated as very durable and moderately resistant to termite attack; sapwood liable to attack by powderpost beetles. In East African waters, teredo are slow to attack and develop. Pholad attack is more rapid.
Preservation: Extremely resistant to preservative treatments; sapwood reported to be moderately resistant.
Uses: Exterior joinery (window frames, doors), flooring, heavy construction including harbor and dock work, furniture, because of good acid resistance used for vats and tanks.
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