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African Pterygota
African Pterygota (Pterygota bequaertii)

Family:

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

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

Distribution overview: Common in the tropical evergreen and mixed deciduous forests of West Africa. Its range extends from the Ivory Coast to Zaire.

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 the species is a regular source of timber for export.

Environment profile: Status unknown in many of its growth areas

Tree size: Tree height is 60-70 m

Colors: the heart isWhite to cream, Yellowish tingeand the sapwoodPale yellow, Yellow.The grain isStraight, the textureMediumand 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

Silica Content: Siliceous

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

Drying Defects: Shakes may become extended, Slight surface checking

Ease of Drying: Rapidly

Blunting Effect: Slight

Boring: Moderately easy

Carving: Satisfactory results

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Gluing: Good gluing properties

Mortising: Response to ordinary tools is fairly good

Moulding: Moulds easily with machine tools

Movement in Service: Moulds easily with machine tools

Nailing: Good nailing properties

Planing: Torn grain common in quartersawn material

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Responds Poorly

Routing recessing: Routes fairly well with machine tools

Sanding: Fairly good sanding characteristics

Turning: Satisfactory turning qualities

Polishing: Generally good ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,5 0,53
Density 592 kg/m3
Bending Strength 693 1053 kg/cm2
Crushing Strength 339 555 kg/cm2
Hardness 875 kg
Impact Strength 78 93 cm
Shearing Strength 101 kg/cm2
Stiffness 93 123 1000 kg/cm2
Tangential Shrinkage 11 %
Radial Shrinkage 6 %
Weight 849 657 kg/m3
Maximum Load 0,91 1,05 cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 9869 14989 psi
Density 37 lbs/ft3
Hardness 1931 lbs
Impact Strength 31 37 inches
Maximum Crushing Strength 4827 7903 psi
Shearing Strength 1448 psi
Stiffness 1332 1751 1000 psi
Work to Maximum Load 13 15 inch-lbs/in3
Specific Gravity 0.5 0.53
Weight 53 41 lbs/ft3
Radial Shrinkage 6 %
Tangential Shrinkage 11 %
Volumetric Shrinkage 15 %

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

Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchChudnoff, 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.Lavers, G. M.1966.The Strength Properties of Timbers.Forest Products Research Bulletin, No. 50.Ministry of Technology, Her Majesty's Stationery Office, London.Lincoln, W.A. 1986. World Woods in Color. Linden Publishing Co. Inc., Fresno, California.
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