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African PterygotaAfrican PterygotaAfrican Pterygota
African Pterygota (Pterygota macrocarpa)

Family:

Common names: African pterygota, Ake, Anatolia, Awari, Ikame, Kakende, Kefe, Koto, Kyere, Poroposo, Pterygota

Distributed in: Cameroon, Gabon, Ghana, Ivory Coast, Nigeria, Sierra Leone, Zaire (Africa)

Distribution overview: Reported to grow in the lowland rain forests, especially the drier areas from Sierra Leone to Zaire in Africa.

Common uses: Bent Parts, Broom handles, Building materials, Cabinetmaking, Chairs, Chests, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Drawer sides, Excelsior, Figured veneer, Fine furniture, Furniture , Furniture components, Furniture squares or stock, Hatracks, Interior construction, Interior trim, Joinery, Kitchen cabinets, Living-room suites, Millwork, Moldings, Office furniture, Plywood, Radio - stereo - TV cabinets, Rustic furniture, Stools, Trimming, Utility furniture, Veneer, Wainscotting, Wardrobes

Product sources: The ITTO reports that this species is a regular source of timber for export.

Environment profile: Vulnerable in parts of its natural habitat

Tree size: Tree height is 10-20 m

Colors: the heart isWhite to cream, Yellowand the sapwoodWhite, Yellow.The grain isStraight, the textureMedium to very coarse and the lusterMedium

Natural durability: Sapwood is susceptible to wood broing insects , Wood in contact with gound may last only 5 years

Odor: Seasoned wood has no odor or taste

Kiln Schedules: T8 - D3s (8/4) US

Drying Defects: Shakes may become extended, Slight surface checking

Ease of Drying: Easy

Blunting Effect: Slight

Carving: Satisfactory results

Cutting Resistance: Easy to saw

Gluing: Good gluing properties

Nailing: Good nailing properties

Planing: Torn grain common in quartersawn material

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Moderate working qualities

Sanding: Fairly good sanding characteristics

Steam bending: Very poor

Turning: Satisfactory turning qualities


  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,5 0,54
Density 592 kg/m3
Bending Strength 618 1008 kg/cm2
Crushing Strength 297 510 kg/cm2
Hardness 424 kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 82 120 1000 kg/cm2
Tangential Shrinkage 11 %
Radial Shrinkage 6 %
Weight 849 592 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 8797 14337 psi
Density 37 lbs/ft3
Hardness 936 lbs
Maximum Crushing Strength 4234 7262 psi
Stiffness 1174 1716 1000 psi
Specific Gravity 0.5 0.54
Weight 53 37 lbs/ft3
Radial Shrinkage 6 %
Tangential Shrinkage 11 %
Volumetric Shrinkage 15 %

Resists denting and marring
Heavy
Hardness (side grain) = medium
Density = high
Compression strength (parallel to grain) = high
Bending strength (MOR) = high

Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.HMSO.1972.Handbook of Hardwoods.2nd Edition.Revised by R.H. Farmer.Department of the Environment, Building Research Establishment, Princes Risborough Laboratory, Princes Risborough, Aylesbury, Buckinghamshire.ITTO.1986.Tropical Timber Atlas, Volume 1 - Africa.International Tropical Timber Organization (ITTO) and Centre Technique Forestier Tropical (CTFT, 45bis, Avenue de la Belle Gabrielle, Nogent-sur-Marne Cedex, France.Keay, R.W.J.1989. Trees of Nigeria.Revised Version of Nigerian Trees. Clarendon Press, Oxford.Lincoln, W.A. 1986. World Woods in Color. Linden Publishing Co. Inc., Fresno, California.
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