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Omu (Entandrophragma candollei)
Family: Meliaceae Common names: Atom, Atom assie, Bouboussou rouge, Candollei, Diamuni, Entandrophragma mahogany, Esaka, Heavy mahogany, Heavy sapele, Heavy sapelle, Impompo, Kosipo, Lifaki mpembe, Lifuco, Okpoloco, Omu, Penkkwa akowaa, Penkwa, Penkwa-akowaa, Pepedom, Sapele-heavy, Tshimaie tshikunze, Tshimaye rouge, Unscented mahogany Distributed in: Angola, Cameroon, Congo, Ghana, Guinea, Ivory Coast, Liberia, Nigeria, Zaire (Africa) Distribution overview: West Africa to Angola and the Congo region (Angola, Cameroon, Congo, Cd'Ivoire, DR Congo, Gabon, Ghana, Guinea, Liberia, Nigeria); in evergreen, moist, and transitional formations. A large tree of lowland rainforest. Common uses: Boat building (general), Boat building, Boxes and crates, Cabinetmaking, Canoes, Chairs, Chests, Concealed parts (Furniture), Decorative veneer, Desks, Dining-room furniture, Dowell pins, Dowells, Drawer sides, Excelsior, Figured veneer, Fine furniture, Floor lamps, Flooring, Flooring: industrial heavy traffic, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Joinery (external): ground contact, Joinery, Kitchen cabinets, Lifeboats, Light construction, Living-room suites, Office furniture, Plywood, Radio - stereo - TV cabinets, Rustic furniture, Shipbuilding, Stools, Tables , Turnery, Utility furniture, Vehicle parts, Veneer, Veneer: decorative, Wardrobes, Wheel spokes, Wheels Product sources: The ITTO reports that timber from this species is produced regularly and exported frequently. Environment profile: Status unknown in many of its growth areas Tree size: Trunk diameter is 100-150 cm
Colors: the heart isRed, Reddish brownand the sapwoodWhite to yellow, Yellow.The grain isStraight to interlocked, the textureMedium to coarseand the lusterDull
Natural durability: Susceptible to marine borer attack, Susceptible to pinhole borer Odor: No specific smell or taste
Silica Content: Siliceous Kiln Schedules: Kiln Drying Rate (in days) is fairly rapid Kiln Drying Rate: Naturally dries quickly Drying Defects: Moderate collapse and honeycombing, Severe twisting/warping Ease of Drying: Variable results. Tree Identification: Bole/stem form is straight Comments: General finishing qualities are rated as satisfactory Timber produced by Omu is comparatively harder and heavier than other species in the genus Entandrophragma. Blunting Effect: Little Boring: Poor to very poor results Carving: Poor to Very Poor Results Cutting Resistance: Low resistance Gluing: Good properties Mortising: Support material during mortising to prevent break out. Moulding: Tends to tear where interlocked grain is present Movement in Service: Tends to tear where interlocked grain is present Nailing: Holds nails well, Very Good to Excellent Planing: Poor to Very Poor Resistance to Impregnation: Sapwood is moderately resistant Response to hand tools: Easy to machine Routing recessing: Very good in both routing and recessing Sanding: Yields smooth, clean surfaces Veneering qualities: Veneers easily, Veneers moderately easy Steam bending: Poor
Screwing: Good screw holding properties, Screwing yields good results; Turning: Yields smooth, clean surface.
Painting: Very Good to Excellent; Polishing: Good; Staining: Very Good to Excellent; Varnishing: Very Good to Excellent;
Density (dry weight) = 38-45 lbs/cu. ft. 1 Max. crushing strength = medium Bending strength (MOR) = medium Shrinkage, Radial = moderate Hardness (side grain) = soft Density (dry weight) = 46-52 lbs/cu. ft. Shrinkage, Tangential = small Shrinkage, Tangential = fairly large Shrinkage, Radial = small Shearing strength (parallel to grain) = very low Modulus of Elasticity (stiffness) = very low Modulus of Elasticity (stiffness) = low Bending strength (MOR) = low Shrinkage, Volumetric = moderate Shrinkage, Volumetric = large Shrinkage, Tangential = moderate Shrinkage, Radial = large Max. crushing strength = high Bending strength (MOR) = high Toughness (total work) = low Max. crushing strength = low Hardness (side grain) = medium Bending strength (MOR) = very high Bois et Forets des Tropiques,1950,Kosipo - Entandrophragma candollei,Bois et Forets des Tropiques,15, pp251-4Bois et Forets des Tropiques,1978,Kosipo - Entandrophragma candollei,Bois et Forets des Tropiques No.181,pp29-40Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchBrown, W.H.,1969,Properties and uses of Tropical hardwoods in the United Kingdom. Part 1,Nonstructural properties and uses.,Conference on Tropical hardwoods SC-5/TN-5, Syracuse UniversityBrown, W.H.,1978,Timbers of the World No.1 Africa,TRADA, Red Booklet SeriesChudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Erfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry DepartmentFarmer, R.H.,1972,Handbook of Hardwoods,HMSOFortin, Y., Poliquin, J.,1976,Natural Durability and Preservation of 100 Tropical African Woods,International Development Research Centre, CanadaFouarge, 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.,1966,Bois Tropicaux,C.T.F.T. Publ.,12France - C.T.F.T.,Resultats des Observations et des essais effectues au CTFT sur Kosipo,C.T.F.T.,No.105Ghana - Timber Marketing Board,1969,Ghana Hardwoods,Timber Marketing BoardHMSO.1981.Handbook of Hardwoods, 2nd Edition.Revised by R.H. Farmer. Department of the Environment, Building Research Establishment, Princes Risborough Laboratory, Princes Risborough, Aylesbury, Buckinghamshire.Hughes, J.F.,1971,The Principal Timber Trees of Cameroon,Unpublished dataIrvine, F.R.,1961,Woody Plants of Ghana,O.U.P. LondonITTO.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.Jay, B.A.,1968,Timbers of West Africa,TRADA, Red Booklet SeriesKeen, G.R.,1947,West African Timbers,Wood,12(6, pp172-6Kryn, J.M., Forbes, E.W.,1959,The Woods of Liberia,U.S.A. Department of Agriculture,Forest Products Laboratory, Madison,,Report No. 2159Kukachka, B.F.,1970,Properties of Imported Tropical Woods,Forest Research Paper FPL 125Lavers, G. M.1966.The Strength Properties of Timbers.Forest Products Research Bulletin, No. 50.Ministry of Technology, Her Majesty's Stationery Office, London.Lebacq, L., Dechamps, R.,1967,Contribution a un Inventaire de Forets du Nord-kasai,Musee Royal de L'Afrique Centrale Belgium Annals Series 8 No.5Lincoln, W.A. 1986.World Woods in Color.Linden Publishing Co. Inc., Fresno, California.Okigbo, L., Von Wendorff, G.,1964,Some Nigerian Woods (2nd Edition,Federal Ministry of Information LagosPieters, A.,1977,Essences Forestieres du Zaire,R.U.G. Gent BelguimRendle, B.J.,1938,Commercial Mahoganies and Allied Timbers,Forest Products Research Laboratory, London Bulletin,No 18Rendle, B.J.,1969,World Timbers (3 Vols.,Ernest Benn Ltd. LondonSallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TSallenave, P.,1964,Proprietes Physiques et Mecaniques des Bois Tropicaux (Premier Supplement,C.T.F.T. Publ.,no.23Tailfer, Y.,1972,Les Acajous de la Foret Dense Zairoise leur Identification Forestiere,Musee Royale de L'Afrique Centrale Sciences EconoTakahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7 |
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