Search for

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. Common Names Common Uses Countries of Distribution Cutting Resistance Ease of Drying Family Name Gluing Grain Heartwood Color Kiln Drying Rate Light-Induced Color Change Luster Nailing Natural Durability Numerical Data Planing Polishing References Regions of Distribution Response to Hand Tools Sapwood Color Scientific Name Strength Properties Synonyms Texture Trade Name Tree Identification Tree Size Scientific Name Calpocalyx brevibracteatus Trade Name Gogbi Family Name Leguminosae Synonyms Calpocalyx winkleri Common Names Gogbi, Jugbe, Kolei, Kondo, Kotopapa, Kotoprepre, Kpu-eh, Mano, Okpagheze, Otuen, Petepre, Samanta, Teli, Tili, Tre-tre, Yinni Regions of Distribution Africa Countries of Distribution  [VIEW MAP] Benin, Cameroon, Ghana, Ivory Coast, Liberia, Nigeria, Sierra Leone, Togo Common Uses Boat building (general), Heavy construction, Poles, Posts, Railroad ties, Tool handles Heartwood Color Reddish brown Black Red Purple Dark brown Brown Sapwood Color White to yellow Different than heartwood Grain Figure Stripe (figure) Texture Fine Coarse Luster Dull Natural Durability Perishable Moderately durable Non-durable Susceptible to insect attack Resistant to powder post beetles Light-Induced Color Change None Ease of Drying Slowly Kiln Drying Rate Naturally dries slowly Tree Identification Bole/stem form is not buttressed Bole/stem form is buttressed Tree Size Tree height is 0-10 m Tree height is 10-20 m Cutting Resistance Fairly Difficult to Very Difficult to saw Gluing Fairly Difficult to Very Difficult Fair to Good Results Fairly Easy to Very Easy Nailing Fairly Difficult to Very Difficult Planing Fairly Easy to Very Easy Response to Hand Tools Difficult to machine Polishing Fair to Good Results Strength Properties Density (dry weight) = 53-60 lbs/cu. ft Max. crushing strength = high Density (dry weight) = 46-52 lbs/cu. ft. Bending strength (MOR) = high Modulus of Elasticity (stiffness) = high Hardness (side grain) = hard Numerical Data Item Green Dry English Bending Strength 13576 20956 psi Density 53 lbs/ft3 Hardness 2318 lbs Maximum Crushing Strength 6899 9945 psi Stiffness 2167 2494 1000 psi Weight 52 42 lbs/ft3 Item Green Dry Metric Bending Strength 954 1473 kg/cm2 Density 849 kg/m3 Hardness 1051 kg Maximum Crushing Strength 485 699 kg/cm2 Stiffness 152 175 1000 kg/cm2 References Cooper, G.P., Record, S.J.,1931,The Evergreen Forests of Liberia,Yale School Forestry Bulletin,31,pp1-153 Dalziel, J.M.,1937,The Useful Plants of West Tropical Africa,Crown Agents for the Colonies Dudek, S.,1981,Lesser Known Liberian Timber Species,German Agency for Technical Cooperation Germany Irvine, F.R.,1961,Woody Plants of Ghana,O.U.P. London Keay, R.W.J.,1964,Nigerian Trees Vol.2,Nigeria Federal Department of Forest Research, Ibadan Kryn, J.M., Forbes, E.W.,1959,The Woods of Liberia,U.S.A. Department of Agriculture,Forest Products Laboratory, Madison,,Report No. 2159 Savill, P.S., Fox, J.E.D.,1967,Trees of Sierra Leone 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 Voorhoeve, A.G.,1965,Liberian High Forest Trees,Centre for Agric. Publishing and Documentation, Wageningen