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Adzum
Adzum (Dacryodes igaganga)

Family: Burseraceae

Common names: Adzum, Antaga, Assas, Bamisa, Beuhago, Bosao, Boso, Diganga, Eben, Esasia, Eyemedoime, Geyeumeyume, Ibagho, Iganga, Kisafou, Mokoba, Onumu, Orumu, Osa, Osegou, Ossabel, Ossamvegne

Distributed in: Cameroon, Central African Republic, Congo, Gabon, Ivory Coast, Zaire (Africa)

Common uses: Boat building (general), Cabinetmaking, Carvings, Flooring, Flooring: industrial heavy traffic, Furniture, Handles: general, Heavy construction, Joinery, Ladders, Light construction, Piling, Pulp/Paper products, Toys, Turnery, Veneer

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodWhite to yellow, Yellow.The grain isWavy, the textureMediumand the lusterMedium

Natural durability: The heartwood is susceptible to wood staining fungal attack, Very durable

Silica Content: Moderate silica contact

Kiln Drying Rate: Very slow

Drying Defects: Checking, Distortion

Ease of Drying: Slowly

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good

Blunting Effect: High to severe

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Gluing: Easy to glue

Nailing: Easy to nail, Holds nails well

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Moderate working qualities

Veneering qualities: Suitable for peeling, There is slight to moderate drying degrade and the potential for buckles and splits

Screwing: Easy to screw, Screwing yields good results; Turning: Very Good to Excellent Results

Polishing: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 608 kg/m3
Bending Strength 738 1148 kg/cm2
Crushing Strength 406 605 kg/cm2
Hardness 451 kg
Impact Strength cm
Shearing Strength 136 kg/cm2
Stiffness 106 122 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 592 480 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 10510 16340 psi
Density 38 lbs/ft3
Hardness 995 lbs
Maximum Crushing Strength 5780 8614 psi
Shearing Strength 1939 psi
Stiffness 1512 1745 1000 psi
Weight 37 30 lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 8 %

Density (dry weight) = 38-45 lbs/cu. ft.
Modulus of Elasticity (stiffness) = high
Shrinkage, Radial = fairly large
Density (dry weight) = 31-37 lbs/cu. ft.
Bending strength (MOR) = medium
Shrinkage, Tangential = fairly large
Max. crushing strength = medium
Bending strength (MOR) = high
Shrinkage, Tangential = moderate
Shearing strength (parallel to grain) = medium
Modulus of Elasticity (stiffness) = medium
Modulus of Elasticity (stiffness) = low
Density (dry weight) = 46-52 lbs/cu. ft.
Shrinkage, Tangential = large
Shrinkage, Radial = moderate
Shrinkage, Radial = large
Shearing strength (parallel to grain) = very low
Shearing strength (parallel to grain) = low
Shearing strength (parallel to grain) = high
Hardness (side grain) = soft
Bending strength (MOR) = low

Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchErfurth, 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. FranceSallenave, 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.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
*Come interpretare i dati (manleva su eventuali imprecisioni)