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Afina (Strombosia glaucescens)
Family: Olacaceae Common names: Afina, Dalakadaba, Dandala, Itako, Mukundu, Nzumgambakala, Otingbo, Poe, Tshipulupulu tshitoke Distributed in: Angola, Benin, Cameroon, Congo, Equatorial Guinea, Gabon, Ghana, Ivory Coast, Liberia, Nigeria, Sierra Leone, Togo, Zaire (Africa) Distribution overview: The growth range of the species extends from Sierra Leone on the west coast of Africa to the Congo region. It is usually found in the rain forest as a dominant species, and in transition zones. Common uses: Agricultural implements, Boat building (general), Bridge construction, Carvings, Factory flooring, Flooring, Flooring: commercial heavy traffic, Fuelwood, Handles, Handles: general, Heavy construction, Joinery, Ladders, Light construction, Mathematical instruments, Mine timbers, Piling, Plywood, Poles, Posts, Railroad ties, Shade rollers, Shafts/Handles, Sporting Goods, Sub-flooring, Textile equipment, Tool handles, Toys, Turnery, Utility poles, Vehicle parts Environment profile: Status unknown in many of its growth areas Tree size: Tree height is 30-40 m
Colors: the heart isReddish brown, Yellow to golden-yellow to orangeand the sapwoodWhite to yellow, Yellow.The grain isStraight, the textureMediumand the lusterMedium
Natural durability: Very durable, Very durable Odor: No distinctive taste Drying Defects: Severe end splitting, Severe surface checking Ease of Drying: Requires carefully controlled drying to prevent degrade Tree Identification: Bole/stem form is straight Comments: General finishing qualities are rated as good High tendency to split Oily streaks are present Blunting Effect: Moderate Boring: Good results with ordinary tools Carving: Fairly good response to preservative treatment
Cutting Resistance: Timber saws cleanly but has a tendency to spring and split Gluing: Good gluing characteristics Mortising: Finishes well Moulding: Good moulding properties Movement in Service: Good moulding properties Nailing: Nails hold poorly, Possible if prebored Planing: Planes well, to a good finish Resistance to Impregnation: Sapwood is permeable Resistance to Splitting: Poor
Response to hand tools: Variable qualities Routing recessing: Routing characteristics are good Sanding: Good sanding finish Veneering qualities: Easy to cut, Suitable for slicing
Screwing: Poor screwing properties, Possible if prebored; Turning: Good results
Polishing: Very Good to Excellent;
Density (dry weight) = 61-67 lbs/cu. ft. Shrinkage, Radial = large Modulus of Elasticity (stiffness) = high Bending strength (MOR) = very high Shrinkage, Tangential = large Max. crushing strength = high Density (dry weight) = 53-60 lbs/cu. ft. Density (dry weight) = 46-52 lbs/cu. ft. Max. crushing strength = very high Hardness (side grain) = very hard Shrinkage, Tangential = moderate Shrinkage, Radial = small Density (dry weight) = 67-75 lbs/cu. ft. Very heavy Shrinkage, Tangential = small Shrinkage, Tangential = fairly large Shrinkage, Radial = moderate Shearing strength (parallel to grain) = very high Hardness (side grain) = hard Density = very high Compression strength (parallel to grain) = very 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.Dudek, S.,1981,Lesser Known Liberian Timber Species,German Agency for Technical Cooperation GermanyFouarge, J.,1970,Essais Physiques,Mecaniques et de Durabilite de Bois de la Republique,Democratique du Congo,I.N.E.A.C. Belgium Serie Technique,No.76Ghana - Timber Marketing Board,1969,Ghana Hardwoods,Timber Marketing BoardHughes, J.F.,1971,The Principal Timber Trees of Cameroon,Unpublished dataKeay, R.W.J.,1964,Nigerian Trees Vol.2,Nigeria Federal Department of Forest Research, IbadanKryn, J.M., Forbes, E.W.,1959,The Woods of Liberia,U.S.A. Department of Agriculture,Forest Products Laboratory, Madison,,Report No. 2159Lebacq, L., Dechamps, R.,1967,Contribution a un Inventaire de Forets du Nord-kasai,Musee Royal de L'Afrique Centrale Belgium Annals Series 8 No.5Sallenave, P.,1964,Proprietes Physiques et Mecaniques des Bois Tropicaux (Premier Supplement,C.T.F.T. Publ.,no.23Takahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Unwin, A.H.,1920,West African Forests and Forestry,T. Fisher Unwin Ltd. LondonVoorhoeve, A.G.,1965,Liberian High Forest Trees,Centre for Agric. Publishing and Documentation, Wageningen |
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