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Guarea (Guarea cedrata)
Family: Meliaceae Common names: African cedar, Anokue, Belii, Bonsannua, Bosae, Bosasa, Bosassa, Bossassa, Bosse, Bosse clair, Bosse', Bossi, Cedar mahogany, Cedron, Diambi, Ditoke, Duruiti, Dzana, Ebangbembra, Ebangbemva, Edoucie', Guano blanco, Guarea, Guarea bosse, Guissu, Kwabohoro, Kwabohuro, Kwadwema, Light bosse, Lofun, Lombe, Mbosse', Ngbose, Nigerian cedar, Nigerian pearwood, Obobo, Obobo nofua, Obobo-nofwa, Obodo blanc, Onwamdua, Ossoung, Pahiapo, Penkwa, Scented guarea, Scented mahogany, Telemia, Tenumeadomei, Tshidiamakeka, White guarea Distributed in: Cameroon, Congo, Ghana, Ivory Coast, Liberia, Nigeria, Sierra Leone, Uganda, Zaire (Africa) Distribution overview: The range of both species overlaps in Ivory Coast, Ghana, and southern Nigeria. G. cedrata extends into the Cameroons. G. Cedreta trees are most common in moist semi-deciduous forest and in the dryer undisturbed areas of moist evergreen forest. Common uses: Boat building (general), Boat building, Boxes and crates, Cabinetmaking, Canoes, Carvings, Chairs, Chests, Concealed parts (Furniture), Core Stock, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Dowell pins, Dowells, Drawer sides, Excelsior, Figured veneer, Fine furniture, Floor lamps, Flooring, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Heavy construction, Joinery, Kitchen cabinets, Lifeboats, Light construction, Living-room suites, Millwork, Musical instruments, Office furniture, Paneling, Plain veneer, Plywood, Radio - stereo - TV cabinets, Rustic furniture, Shipbuilding, Stools, Structural plywood, Tables , Turnery, Utility furniture, Utility plywood, Vehicle parts, Veneer, Veneer: decorative, Wardrobes Product sources: The ITTO reports that the species is an important and regular source of timber for export. Environment profile: Status unsure as a result of insufficient information Tree size: Tree height is 50-60 m
Colors: the heart isWhite to cream, Yellowand the sapwoodWhite to yellow, Yellow.The grain isWavy, the textureMediumand the lusterPronounced
Natural durability: Very durable, Very durable Odor: No specific smell or taste Silica Content: Slight LightInduced Color Change: Darker
Kiln Schedules: UK=F US=T6D4/T3D3 Fr=6 Kiln Drying Rate: Naturally dries slowly Drying Defects: Slight surface checking, Slight twist/warp Ease of Drying: Slowly Tree Identification: Bole/stem form is straight Comments: General finishing qualities are rated as good General finishing qualities are rated as satisfactory SplittingThere is a slight tendency for this stock to split. Blunting Effect: Moderate Boring: Moderately easy Carving: Responds fairly well to carving
Cutting Resistance: Moderate to saw Gluing: Good gluing properties Mortising: Very Good to Excellent Moulding: Very Good to Excellent Movement in Service: Very Good to Excellent Nailing: Poor to Very Poor , Very Good to Excellent Planing: Very Good to Excellent Resistance to Abrasion: Highly resistant to wear Resistance to Impregnation: Sapwood is permeable Response to hand tools: Responds fairly well to hand tools Routing recessing: Routing is easy
Sanding: Very Good to Excellent Results Veneering qualities: Veneers easily, Veneers moderately easy Steam bending: Satisfactory
Screwing: Good screwing properties, Very Good to Excellent Results; Turning: Very Good to Excellent Results
Polishing: Very Good to Excellent; Staining: Very Good to Excellent; Varnishing: Very Good to Excellent;
Hardness (side grain) = soft 0 Bending strength (MOR) = medium 0 Max. crushing strength = medium 0 Shearing strength (parallel to grain) = medium 0 Density (dry weight) = 31-37 lbs/cu. ft. 0 Shrinkage, Tangential = small 1 Shrinkage, Radial = small 1 Density (dry weight) = 38-45 lbs/cu. ft. 1 Max. crushing strength = high Shrinkage, Volumetric = moderate Shrinkage, Radial = very small Bending strength (MOR) = low Bending strength (MOR) = high Toughness-Hammer drop (Impact Strength) = low Shrinkage, Volumetric = small Shearing strength (parallel to grain) = low Shrinkage, Tangential = very small Shrinkage, Tangential = moderate Shrinkage, Radial = moderate Work to maximum load = low Shrinkage, Volumetric = fairly large Hardness (side grain) = very soft Toughness (total work) = very low Toughness (total work) = low Shrinkage, Radial = fairly large Bending strength (MOR) = very high Antoine, R.C., Berben, J.C.,1958,Le debit des bois a la scie a ruban - 3. Etude du sciage (4 spp.,I.N.E.A.C. Belguim Serie technique,No. 53Banks, 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.48Banks, C.H.,1954,The Mechanical Properties of Timbers with Particular Reference to those,grown in the Union of South Africa,Journal of the South African Forestry Association,No. 24 pp.44-65,[South,African Forestry Journal]Bois et Forets des Tropiques,1951,Bosse (Guarea cedrata,Bois et Forets des Tropiques,20, pp251-4Bois et Forets des Tropiques,1978,Bosse (Guarea cedrata, Guarea laurentii and Guarea thompsonii,Bois et Forets des Tropiques,No.177,pp35-49Bolza, 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 UniversityChudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Cox, H.A.,1939,A Handbook of Empire Timbers,Forest Products Research Laboratory, Princes RisboroughEggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe UgandaErfurth, 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,HMSOForest Products Research Laboratory, U.K.,1945,A Handbook of Empire Timbers,Department of Scientific and Industrial Research Forest Products ResearchForests Products Research Laboratory, U.K.,1956,A Handbook of Hardwoods,Forest Products Research Laboratory, Princes Risborough, Department of,Science and Industrial Research, Building Research EstablishmentFouarge, 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./C.T.B.,1982,Guide pour le Choix des Essences Deroulables-pour la fabrication du,contreplaque,C.T.F.T./C.T.B. FranceFrance - C.T.F.T.,1966,Bois Tropicaux,C.T.F.T. Publ.,12France - Comite Nacional des Bois Coloniaux,1931,Etude Physique et Mecanique des Bois Coloniaux,Assoc. Colonies-Sciences & Comite National des Bios Coloniaux, Paris,,FranceGhana - Timber Marketing Board,1969,Ghana Hardwoods,Timber Marketing BoardHarrar, E.S.,1942,Some Physical Properties of Modern Cabinet Woods 3. Directional and Volume,Shrinkage,Tropical Woods,9(71, pp26-32HMSO.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.Hughes, J.F.,1971,The Principal Timber Trees of Cameroon,Unpublished dataI.U.F.R.O.,1973,Veneer Species of the World,Assembled at F.P.L. Madison on behalf of I.U.F.R.O. Working Party on,Slicing and Veneer CuttingInto the Woods.1993.Personal Communication.Irvine, 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.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.(Shrinkage data)Jay, B.A.,1968,Timbers of West Africa,TRADA, Red Booklet SeriesKeay, 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 LagosKinloch, D., Miller, W.A.,1949,Gold Coast Timbers,Govt. Printer Gold CoastKloot, N.H., Bolza, E.,1961,Properties of Timbers Imported into Australia,C.S.I.R.O. Forest Products Division Technological Paper,No.12Kukachka, B.F.,1970,Properties of Imported Tropical Woods,Forest Research Paper FPL 125Kunkel, G.,1965,The Trees of Liberia,German Forestry Mission to Liberia Report,No.3Lavers, G. M. 1966. The Strength Properties of Timbers. Forest Products Research Bulletin, No. 50. Ministry of Technology, Her Majesty's Stationery Office, London.Lavers, G.M.,1983,The Strength Properties of Timber (3rd ed. revised Moore G.L.,Forest Products Research Laboratory, Princes Risborough, Building Research,Establishment Report (formerly Bulletin No.50)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.Pieters, 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. LondonSaint-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.TSallenave, P.,1971,Proprietes Physiques et Mecaniques des Bois Tropicaux (Deuxieme,Supplement,C.T.F.T.Savill, P.S., Fox, J.E.D.,1967,Trees of Sierra LeoneSpalt, H.A., Stern, W.L.,1956,Survey of African woods 1,Tropical Woods,115(105,pp 13-38Spalt, H.A., Stern, W.L.,1957,Survey of Africa Woods 3,Tropical Woods 16(107) pp92-128Tack, C.H.,1953,Plywood and veneer species,Forest Department, Uganda. Technical Note 5/1953Tack, C.H.,1969,Uganda Timbers,Govt. Printer UgandaTakahashi, 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 SonsTimber Development Association Ltd.,1955,World Timbers (3 Vols.,Timber Development Association Ltd.Titmuss, F.H.,1965,Commercial Timbers of the World,Technical Press Ltd., London, 3rd editionU.A.C.O. Timber Review,1962,A good all-rounder -Agba (Gossweilerodendron balsamiferum,U.A.C.O. Timber Review,6, pp2-6Uganda Forest Department,1954,The Mechanical Properties of some Ugandan Timbers,Uganda Forest Department Timber Leaflet,No.1Uganda Forestry Department,1954,Pilot tests of strength properties of some Ugandan grown timbers,Uganda Forest Department Timber leaflet No. 46Whitmore, T.C.,1973,Tree Flora of Malaya A Manual for Foresters Volume 2,Forest Department Ministry of Primary Industries MalaysiaWood, B., Calnan, D.,1976,Toxic Woods,British Journal of Dermat 94 Suppl. 13 |
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