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Clicking any heading in the main data area (at right) will scroll the page back to this top position. Use the following links to jump to the associated section in the main data. Blunting Effect Comments Common Names Common Uses Countries of Distribution Ease of Drying Family Name Gluing Grain Heartwood Color Kiln Drying Rate Luster Natural Durability Numerical Data Polishing References Regions of Distribution Response to Hand Tools Sapwood Color Scientific Name Staining Strength Properties Synonyms Texture Trade Name Tree Identification Tree Size Scientific Name Brachystegia mildbraedii Trade Name Ariellia Family Name Leguminosae Synonyms Brachystegia nzang Common Names Ariellia, Bomanga, Ekop evene, Evene, Mzang, Zebrano, Zebrawood, Zingara Regions of Distribution Africa Countries of Distribution  [VIEW MAP] Angola, Cameroon, Congo, Gabon, Kenya, Malawi, Mozambique, Tanzania, Zimbabwe Common Uses Boat building (general), Boxes and crates, Cabinetmaking, Furniture, Heavy construction, Joinery, Light construction, Plywood, Turnery, Vehicle parts, Veneer: decorative Heartwood Color Yellow Black Brown Green/grey Orange Yellow to golden-yellow to orange Reddish brown Brown Sapwood Color White Yellow Green/Grey White to yellow Clearly differentiated from the heartwood Grain Even Closed Straight Interlocked Figure Wavy Distinct (figure) Straight Interlocked Wavy Distinct figure Texture Fine Medium Coarse Medium Coarse Medium coarse to coarse Fine Fine to medium Luster Medium High Lustrous Pronounced Natural Durability Susceptible to attack from termites (Isoptera) Susceptible to attack from powder post (Lyctid & Bostrychid) beetles Susceptible to marine borer attack Sapwood is susceptible to wood staining fungal attack Resistant to attack from powder post (Lyctid & Bostrychid) beetles Perishable Non durable Moderately durable Ease of Drying Moderately Difficult to Difficult Slowly Kiln Drying Rate Naturally dries at a moderate speed Tree Identification Bole/stem form is buttressed Tree Size Bole length is 10-20 m Tree height is 40-50 m Trunk diameter is 100-150 cm Comments General finishing qualities are rated as good Blunting Effect Blunting effect on sawing dry wood is moderate Blunting effect on machining is moderate Gluing Easy to glue Response to Hand Tools Easy to Work Fairly Difficult to Difficult to Work Easy to machine Moderate working qualities Polishing Fair to Good Results Satisfactory results Staining Finish is generally satisfactory Strength Properties Shrinkage, Tangential = moderate Bending strength (MOR) = medium Shrinkage, Radial = small Max. crushing strength = medium Shrinkage, Radial = fairly large Modulus of Elasticity (stiffness) = very low Shrinkage, Volumetric = moderate Shrinkage, Volumetic = fairly large Shrinkage, Tangential = small Shrinkage, Tangential = large Shrinkage, Tangential = fairly large Shrinkage, Radial = moderate Shrinkage, Radial = large Shearing strength (parallel to grain) = very low Shearing strength (parallel to grain) = medium Shearing strength (parallel to grain) = low Modulus of Elasticity (stiffness) = low Max. crushing strength = high Hardness (side grain) = very soft Hardness (side grain) = soft Density (dry weight) = 38-45 lbs/cu. ft. Density (dry weight) = 31-37 lbs/cu. ft. Bending strength (MOR) = low Bending strength (MOR) = high Numerical Data Item Green Dry English Bending Strength 9488 14801 psi Density 36 lbs/ft3 Hardness 657 lbs Maximum Crushing Strength 4662 7284 psi Shearing Strength 1713 psi Stiffness 1131 1321 1000 psi Weight 35 28 lbs/ft3 Radial Shrinkage 4 % Tangential Shrinkage 8 % Volumetric Shrinkage 12 % Item Green Dry Metric Bending Strength 667 1040 kg/cm2 Density 576 kg/m3 Hardness 298 kg Maximum Crushing Strength 327 512 kg/cm2 Shearing Strength 120 kg/cm2 Stiffness 79 92 1000 kg/cm2 Weight 560 448 kg/m3 Radial Shrinkage 4 % Tangential Shrinkage 8 % References Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building Research Erfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry Department France - 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. France Hughes, J.F.,1971,The Principal Timber Trees of Cameroon,Unpublished data Kribs, D.A.,1950,Commercial and Foreign Woods on the American Market (a manual to their,structure, identification, uses and distribution,U.S.A. Penn. State College, Tropical Woods Laboratory Letouzey, R., Mouranche, R.,1952,Ekop du Cammeroun,C.T.F.T,France Publ.,No.4 Sallenave, P.,1964,Proprietes Physiques et Mecaniques des Bois Tropicaux (Premier Supplement,C.T.F.T. Publ.,no.23 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