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Angueuk
Angueuk (Ongokea gore)

Family: Oleaceae

Common names: Andjek, Angeuk, Angok, Angueuk, Anjek, Anojek, Balla-tue, Bobwe, Boleke, Boleko, Bui, Buleka, Dimuma, Dimuma dileka, Ekuzo, Elede, Gbui, Ibeka, Isano, Isanu, Kosin, Kouero, Ksin, Kuoto, Kuwi, Kwi, Limuna, Mobengui, Moungueke, Muketu, Muleku, N'sano, Nek, Nessano, Ngore, Nzieke, Okeka, Oleke, Oleko, Olekwa, Sano, Sanou, Sanu

Distributed in: Angola, Benin, Cameroon, Congo, Equatorial Guinea, Gabon, Ghana, Ivory Coast, Liberia, Nigeria, Sierra Leone, Togo, Zaire (Africa)

Distribution overview: The genus Ongokea is represented by only one species which occurs in the evergreen humid forests from Sierra Leone to Zaire and Angola in Africa.

Common uses: Barge fenders, Bedroom suites, Bent Parts, Building construction, Building materials, Cabin construction, Cabinetmaking, Chairs, Chests, Concealed parts (Furniture), Concrete formwork, Construction, Decorative plywood, Desks, Dining-room furniture, Docks, Dockwork, Domestic flooring, Dowell pins, Dowells, Drawer sides, Excelsior, Factory construction, Fine furniture, Floor lamps, Flooring, Form work, Foundation posts, Furniture , Furniture components, Furniture squares or stock, Furniture, Handles, Harbor work, Hatracks, Heavy construction, Interior construction, Interior trim, Joinery, Light construction, Marine construction, Mine timbers, Musical instruments, Piling, Plywood, Poles, Posts, Pulp/Paper products, Railroad ties, Tool handles, Turnery, Vehicle parts, Veneer, Veneer: decorative

Product sources: The tree is also a source of many important non-timber products. The bark yields tannin, and seed kernels are used for soap and lubricants. The tree also produces an edible fruit.

Environment profile: Data source is World Conservation Monitoring Center Secure in Cameroon, Ivory Coast and Liberia. Its environmental status is currently listed as unknown because of inadequate information in Angola, Congo, Equatorial Guinea, Gabon, Ghana, Nigeria, Sierra Leone, and Zaire

Tree size: It develops straight and cylindrical stems above an occasional lobed or swollen base.

Colors: the heart isWhite to cream, Yellow to golden-yellow to orangeand the sapwoodSame as heartwood, Yellow.The grain isWeak figure, the textureUniformand the lusterDull

Natural durability: Susceptible to marine borer attack, Very durable

Odor: No specific smell or taste

Silica Content: Siliceous

Kiln Schedules: Dry at a slow speed

Drying Defects: Slight twist/warp, Splitting

Ease of Drying: Slowly

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good

Blunting Effect: Medium blunting effect on tools

Boring: Fairly difficult to very difficult

Carving: Fairly Difficult to Very Difficult

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Gluing: Good gluing properties

Mortising: Fairly Difficult to Very Difficult

Moulding: Fairly Difficult to Very Difficult

Movement in Service: Fairly Difficult to Very Difficult

Nailing: Holds nails well, Tends to split during nailing

Planing: Yields smooth surfaces

Resistance to Impregnation: Sapwood is moderately resistant

Response to hand tools: Yields a smooth, clean finish

Routing recessing: Fairly Difficult to Very Difficult

Sanding: Good sanding properties

Screwing: Good screw holding properties, May split in screwing ; Turning: Fairly Difficult to Very Difficult

Polishing: Satisfactory; Staining: Good staining qualities; Varnishing: Very good response to preservative treatment ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,65 0,69
Density 865 kg/m3
Bending Strength 904 1393 kg/cm2
Crushing Strength 451 697 kg/cm2
Hardness 1046 kg
Impact Strength cm
Shearing Strength 190 kg/cm2
Stiffness 138 159 1000 kg/cm2
Tangential Shrinkage 10 %
Radial Shrinkage 4 %
Weight 849 673 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 12866 19826 psi
Density 54 lbs/ft3
Hardness 2306 lbs
Maximum Crushing Strength 6416 9922 psi
Shearing Strength 2710 psi
Stiffness 1976 2270 1000 psi
Specific Gravity 0.65 0.69
Weight 53 42 lbs/ft3
Radial Shrinkage 4 %
Tangential Shrinkage 10 %
Volumetric Shrinkage 14 %

Max. crushing strength = high 1
Bending strength (MOR) = high 1
Shrinkage, Tangential = large 0
Shrinkage, Radial = large
Bending strength (MOR) = medium
Modulus of Elasticity (stiffness) = high
Hardness (side grain) = hard
Shrinkage, Radial = moderate
Shearing strength (parallel to grain) = high
Modulus of Elasticity (stiffness) = medium
Density (dry weight) = 53-60 lbs/cu. ft
Bending strength (MOR) = very high
Shrinkage, Radial = fairly large
Modulus of Elasticity (stiffness) = low
Max. crushing strength = medium
Hardness (side grain) = very hard
Very heavy
Very dense
Shrinkage, Tangential = fairly large
Shrinkage, Radial = small
Shearing strength (parallel to grain) = very high
Hardness (side grain) = soft
Density (dry weight) = 46-52 lbs/cu. ft.
Compression strength (parallel to grain) = high

Banks, C.H. and J.P. Schoeman. 1963. Railway Sleeper and Crossing Timbers. Bulletin No. 41, Republic of South Africa. The Government Printer, Pretoria, South Africa.Banks, C.H., Schoeman, J.P., Otto, K.P.,1977,The Mechanical Properties of Timbers with particular reference to South,Africa,South African Forestry Research Institute Bulletin,(Ed.,Schoeman, J.P. 1973 & Otto K.P. 1976,No.48Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchBroun, A.F.,(1899,Satinwood,Indian Forester,25(5,pp181-5Chudnoff, 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 GermanyErfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry DepartmentFouarge, J., Gerard, G.,1964,Bois du Mayumbe,I.N.E.A.C. BelguimFouarge, J.,1950,Appropriation de Bois Congolais aux Besoins de la Metropole,I.N.E.A.C. Belgium Serie Technique,No.38Fouarge, J.,1953,Bois du Congo,I.N.E.A.C.Fouarge, 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.76France - C.T.F.T.,1973,Investigations and Tests carried out on Tropical Timber by several,Research Laboratories,CTFTFrance - C.T.F.T.,Resultats des Observations et des Essais Effectues au CTFT sur :Angueuk -,Ongokea gore,C.T.F.T., No.140France - Comite Nacional des Bois Coloniaux,1931,Etude Physique et Mecanique des Bois Coloniaux,Assoc. Colonies-Sciences & Comite National des Bios Coloniaux, Paris,,FranceFreitas, M.C.P.G. de,1961,Madeiras de Angola Series 1,Reprint from Garcia de Orta Lisbon,9(4,pp699-711Hedin, L.,1930,Etude sur la Foret et les Bois du Cameroun,Haut-Commissaire de la CamerounHughes, J.F.,1971,The Principal Timber Trees of Cameroon,Unpublished dataIrvine, F.R.,1961,Woody Plants of Ghana,O.U.P. LondonKeay, R.W.J.1989. Trees of Nigeria.Revised Version of Nigerian Trees. Clarendon Press, Oxford.Keay, R.W.J.,1964,Nigerian Trees Vol.2,Nigeria Federal Department of Forest Research, IbadanKennedy, J.D.,1936,Forest Flora of Southern Nigeria,Government Printer LagosKryn, 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.5Monterio, R.R., Pimenta de Franca, O.F.,1965,Tres Especies Florestais de Angola,Bol. Inst. Invest. Cientifica de Angola Reprint (Luanda, 2(2,pp209-18Pieters, A.,1977,Essences Forestieres du Zaire,R.U.G. Gent BelguimSaint-Aubin, G. de,1963,La Foret du Gabon,CTFT Publ., No.21Sallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TSavill, P.S., Fox, J.E.D.,1967,Trees of Sierra LeoneStone, H.,1923,Etude Descriptive sur les Bois Utiles de la Guyane Francaise,Faculte des Sciences de Marseille FranceTakahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Taylor, C.J.,1960,Synecology and Silviculture in Ghana,University College of Ghana Thomas Nelson and SonsUnwin, A.H.,1920,West African Forests and Forestry,T. Fisher Unwin Ltd. London
*Come interpretare i dati (manleva su eventuali imprecisioni)