Adjouaba (Dacryodes buettneri)
Family: Burseraceae
Common names: Adjouaba, Assa-mingoug, Assia, Essassia, Igaganga, Massikou, Mouguengueri, Mouzighou, Musiku, N'sikou, Nkala, Osighou, Osogho, Ossabel, Ossamvegna, Ozigo, Safoukala, Safunkala, Samveien, Tchibudimbu
Distributed in: Cameroon, Congo, Equatorial Guinea, Gabon (Africa)
Distribution overview: Probably in West Africa and mainly in rain forests.
Common uses: Balusters, Bedroom suites, Boat building (general), Boxes and crates, Building construction, Building materials, Cabinetmaking, Chairs, Chests, Concealed parts (Furniture), Construction, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Domestic flooring, Dowell pins, Dowells, Drawer sides, Excelsior, Figured veneer, Fine furniture, Floor lamps, Flooring, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Interior construction, Joinery (external): ground contact, Joinery, Kitchen cabinets, Light construction, Living-room suites, Millwork, Moldings, Office furniture, Parquet flooring, Plywood, Poles, Posts, Pulp/Paper products, Radio - stereo - TV cabinets, Railroad ties, Rustic furniture, Shipbuilding, Stairworks, Stools, Stringers, Tables, Vats, Vehicle parts, Veneer: decorative
Product sources: The ITTO reports that the species is a regular source of timber for exportation.
Environment profile: Secure within its range
Tree size: Trunk diameter is 150-200 cm
Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodWhite, Yellow.The grain isStraight, the textureMedium to coarseand the lusterOccaisonally lustrous
Natural durability: Susceptible to marine borer attack, Very durable
Odor: No specific smell or taste
Silica Content: Likely to have significant impact on machining
Kiln Schedules: Drying (speed) is fast
Kiln Drying Rate: Very slow
Drying Defects: Moderate surface checking, Splitting
Ease of Drying: Slowly
Tree Identification: Bole/stem form is straight
Comments: General finishing qualities are rated as good
Blunting Effect: Moderate
Boring: Fairly difficult to very difficult
Cutting Resistance: Fairly Difficult to Very Difficult to saw
Gluing: Fairly Easy to Very Easy
Mortising: Fairly Easy to Very Easy
Moulding: Very Good to Excellent
Movement in Service: Very Good to Excellent
Nailing: Fairly Difficult to Very Difficult, Holds nails well
Planing: Very Good to Excellent
Resistance to Impregnation: Resistant sapwood
Response to hand tools: Fairly Difficult to Difficult to Work
Routing recessing: Fairly Difficult to Very Difficult
Sanding: Fairly Easy to Very Easy
Veneering qualities: Veneers easily, Veneers moderately easy
Steam bending: Fair to Good Results
Screwing: Screwing yields good results, Very Good to Excellent Results; Turning: Very Good to Excellent Results
Polishing: Very Good to Excellent; Staining: Very Good to Excellent;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
 |
 |
 |
 |
Item |
Green |
Dry |
Metric |
Specific Gravity |
|
0,56 |
|
Density |
|
657 |
kg/m3 |
Bending Strength |
783 |
1331 |
kg/cm2 |
Crushing Strength |
345 |
589 |
kg/cm2 |
Hardness |
|
450 |
kg |
Impact Strength |
|
|
cm |
Shearing Strength |
|
73 |
kg/cm2 |
Stiffness |
107 |
143 |
1000 kg/cm2 |
Tangential Shrinkage |
7 |
|
% |
Radial Shrinkage |
5 |
|
% |
Weight |
560 |
448 |
kg/m3 |
Maximum Load |
|
|
cm-kg/cm3 |
Toughness |
|
311 |
cm-kg |
Static Bending |
|
|
kg/cm2 |
|
 |  |  |  | Item | Green | Dry | English | Bending Strength | 11139 | 18938 | psi | Density | | 41 | lbs/ft3 | Hardness | | 993 | lbs | Maximum Crushing Strength | 4911 | 8383 | psi | Shearing Strength | | 1052 | psi | Stiffness | 1536 | 2048 | 1000 psi | Toughness | | 270 | inch-lbs | Specific Gravity | | 0.56 | | Weight | 35 | 28 | lbs/ft3 | Radial Shrinkage | 5 | | % | Tangential Shrinkage | 7 | | % | Volumetric Shrinkage | 13 | | % | |
Max. crushing strength = medium Hardness (side grain) = soft Shrinkage, Volumetric = fairly large Shrinkage, Tangential = moderate Shrinkage, Radial = fairly large Bending strength (MOR) = medium Bending strength (MOR) = high Shrinkage, Radial = large Modulus of Elasticity (stiffness) = medium Modulus of Elasticity (stiffness) = low Max. crushing strength = high Density (dry weight) = 38-45 lbs/cu. ft. Shrinkage, Tangential = fairly large Shearing strength (parallel to grain) = very low Density (dry weight) = 31-37 lbs/cu. ft. Shrinkage, Tangential = large Shrinkage, Volumetric = moderate Shrinkage, Radial = moderate Shearing strength (parallel to grain) = low Hardness (side grain) = very soft Hardness (side grain) = medium Bending strength (MOR) = very high
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.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,1947,Ozigo - Pachylobus bultneri,Bois et Forets des Tropiques,No.3,pp43-6Bois et Forets des Tropiques,1955,Quels sont les problemes poses par le deroulage de l'Ozigo,Bois et Forets des Tropiques,No.44, pp56-7Bolza, 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.Erfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry DepartmentFortin, Y., Poliquin, J.,1976,Natural Durability and Preservation of 100 Tropical African Woods,International Development Research Centre, CanadaFrance - 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.,1961,Resultats des Observations et des essais effectues au CTFT sur Ozigo,C.T.F.T.,Information Technique, No.77France - C.T.F.T.,1966,Bois Tropicaux,C.T.F.T. Publ.,12France - C.T.F.T.,1977,Promotion of African Timbers - New Species,CTFT,35 LeafletsGutierrez Oliva, A., Plaza Pulgar, F.,1967,Caracteristicas fisico-mecanicas de las maderas Espanolas. (Physical and,mechanical properties of Spanish timbers.,Min.Agric./Dir.Gen Montes/Instituto Forestral de Investigaciones,y,Experiencias, Madrid pp102Hughes, 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 CuttingITTO.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 SeriesOrganisation for European Economic Co-operation,1951,African Tropical Timber (Nomenclature, Description,OEECSallenave, 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.23Sallenave, P.,1971,Proprietes Physiques et Mecaniques des Bois Tropicaux (Deuxieme,Supplement,C.T.F.T.Takahashi, 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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