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Comments Common Names Common Uses Countries of Distribution Cutting Resistance Drying Defects Ease of Drying Family Name Gluing Grain Heartwood Color Light-Induced Color Change Luster Movement in Service Nailing Natural Durability Numerical Data Painting Planing Polishing References Regions of Distribution Resistance to Impregnation Response to Hand Tools Sapwood Color Scientific Name Screwing Strength Properties Texture Trade Name Tree Identification Tree Size Varnishing Veneering Qualities Scientific Name Coelocaryon preussii Trade Name Ekoune Family Name Myristicaceae Common Names Ekoune, Ekun, Kikubi-lomba, Kikubuilumba, Lomba-kumbi, Wild nutmeg Regions of Distribution Africa Countries of Distribution  [VIEW MAP] Congo, Gabon, Liberia, Nigeria Common Uses Boat building (general), Boxes and crates, Cabinetmaking, Canoes, Furniture, Joinery, Light construction, Matches, Moldings, Particleboard, Plywood, Pulp/Paper products, Toys, Turnery Heartwood Color Yellow to golden-yellow to orange Brown Red Pale brown Sapwood Color White to yellow Pinkish Paler than heartwood Grain Straight Even Straight Texture Coarse Fine to medium Medium Fine Luster Lustrous Pronounced Natural Durability Durable Perishable Moderately durable Resistant to termites Non-durable Non-resistant to powder post beetles Non-resistant to marine borers Susceptible to insect attack Susceptible to attack from powder post (Lyctid & Bostrychid) beetles Non durable Heartwood is susceptible to wood staining fungal attack Susceptible to attack from termites (Isoptera) Susceptible to marine borer attack Light-Induced Color Change Darker Drying Defects Splitting Ease of Drying Fairly Easy Tree Identification Bole/stem form is straight Bole/stem form is not buttressed Bole/stem form is cylindrical Tree Size Tree height is 10-20 m Tree height is 20-30 m Trunk diameter is 100-150 cm Comments General finishing qualities are rated as good Cutting Resistance Easy to saw Cutting Resistance with green wood is easy Gluing Fairly Easy to Very Easy Moderate gluing properties Movement in Service Stable Not stable/prone to move Large Nailing Holds nails well Easy to nail Planing Planes well, to a good finish Resistance to Impregnation Resistant sapwood Resistant heartwood Heartwood is permeable Sapwood is permeable Heartwood is moderately resistant Response to Hand Tools Easy to Work Easy to machine Screwing Screwing yields good results Easy to screw Veneering Qualities Easy to cut Suitable for slicing Suitable for peeling Moderately easy to veneer Drying degrade is often moderate to severe, with collapse, buckles, and splilts Bolt preparation requires steaming Painting Satisfactory results Polishing Very Good to Excellent Results Fair to Good Results Good results Varnishing Satisfactory Strength Properties Density (dry weight) = 38-45 lbs/cu. ft. Max. crushing strength = medium Bending strength (MOR) = medium Shrinkage, Radial = small Shrinkage, Radial = moderate Density (dry weight) = 31-37 lbs/cu. ft. Density (dry weight) = 23-30 lbs/cu. ft. Shrinkage, Tangential = moderate Modulus of Elasticity (stiffness) = medium Shearing strength (parallel to grain) = low Max. crushing strength = low Density (dry weight) = 46-52 lbs/cu. ft. Bending strength (MOR) = low Shrinkage, Tangential = very small Shrinkage, Tangential = small Shrinkage, Tangential = large Shrinkage, Tangential = fairly large Shrinkage, Radial = large Shrinkage, Radial = fairly large Shearing strength (parallel to grain) = very low Shearing strength (parallel to grain) = medium Modulus of Elasticity (stiffness) = very low Modulus of Elasticity (stiffness) = low Bending strength (MOR) = high Shrinkage, Radial = large Numerical Data Item Green Dry English Bending Strength 9043 14120 psi Density 35 lbs/ft3 Maximum Crushing Strength 3408 5688 psi Shearing Strength 1551 psi Stiffness 1589 1835 1000 psi Weight 34 27 lbs/ft3 Radial Shrinkage 4 % Tangential Shrinkage 7 % Item Green Dry Metric Bending Strength 635 992 kg/cm2 Density 560 kg/m3 Maximum Crushing Strength 239 399 kg/cm2 Shearing Strength 109 kg/cm2 Stiffness 111 129 1000 kg/cm2 Weight 544 432 kg/m3 Radial Shrinkage 4 % 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 Fortin, Y., Poliquin, J.,1976,Natural Durability and Preservation of 100 Tropical African Woods,International Development Research Centre, Canada 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 France - C.T.F.T.,1966,Bois Tropicaux,C.T.F.T. Publ.,12 Kryn, J.M., Forbes, E.W.,1959,The Woods of Liberia,U.S.A. Department of Agriculture,Forest Products Laboratory, Madison,,Report No. 2159 Sallenave, 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