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Ekop
Ekop (Tetraberlinia tubmaniana)

Family: Caesalpiniaceae

Common names: African pine, Blo-tu, Ekaba, Eko-andoung, Ekop, Ekop-ribi, Gola, Hoh, Liberian pine, Sikon, Sikon ekop, Tetraberlinia

Distributed in: Liberia (Africa)

Distribution overview: The species occurs in large concentrations in the evergreen rain forests along the coastal region of Liberia.

Common uses: Boat building (general), Boxes and crates, Cabinetmaking, Construction, Flooring: commercial heavy traffic, Furniture , Furniture components, Furniture, General carpentry, Handles: general, Heavy construction, Joinery, Ladders, Light construction, Particleboard, Plywood corestock, Plywood, Pulp/Paper products, Railroad ties, Toys, Turnery, Veneer

Product sources: Ekop is quite abundant within its range.

Environment profile: Status unknown due to inadequate information

Tree size: Trunk diameter is 300-350 cm

Colors: the heart isReddish brown, Yellowand the sapwoodWhite, Yellow.The grain isStriped figure, the textureMedium coarse to coarseand the lusterSlightly lustrous

Natural durability: Susceptible to insect attack, Very durable

Odor: No specific smell or taste

LightInduced Color Change: Darker

Kiln Schedules: Drying (speed) is fast

Kiln Drying Rate: Naturally dries slowly

Drying Defects: Severe surface checking, Uneven Moisture Content

Ease of Drying: Variable

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good

Blunting Effect: Little

Boring: Very good to excellent results

Cutting Resistance: Fairly easy to saw

Gluing: Very Good to Excellent Results

Mortising: Very Good to Excellent

Moulding: Very Good to Excellent

Movement in Service: Very Good to Excellent

Nailing: Fairly Easy to Very Easy, Very Good to Excellent

Planing: Very Good to Excellent

Resistance to Impregnation: Sapwood is permeable

Resistance to Splitting: Satisfactory

Response to hand tools: Responds Readily

Veneering qualities: Veneers easily, Veneers moderately easy

Steam bending: Poor to Very Poor Results

Screwing: Fairly Easy to Very Easy, Very Good to Excellent Results; Turning: Very Good to Excellent Results

Painting: Very Good to Excellent; Polishing: Good; Staining: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,59
Density 705 kg/m3
Bending Strength 662 1163 kg/cm2
Crushing Strength 485 711 kg/cm2
Hardness kg
Impact Strength cm
Shearing Strength 155 kg/cm2
Stiffness 134 160 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 689 512 kg/m3
Maximum Load 0,35 0,49 cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 9417 16548 psi
Density 44 lbs/ft3
Maximum Crushing Strength 6899 10119 psi
Shearing Strength 2205 psi
Stiffness 1916 2276 1000 psi
Work to Maximum Load 5 7 inch-lbs/in3
Specific Gravity 0.59
Weight 43 32 lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 9 %

Bending strength (MOR) = medium
Max. crushing strength = high
Shrinkage, Tangential = large
Shrinkage, Radial = fairly large
Density (dry weight) = 38-45 lbs/cu. ft.
Shrinkage, Tangential = moderate
Shrinkage, Tangential = fairly large
Shrinkage, Radial = moderate
Modulus of Elasticity (stiffness) = medium
Modulus of Elasticity (stiffness) = high
Density (dry weight) = 46-52 lbs/cu. ft.
Shrinkage, Radial = large
Shearing strength (parallel to grain) = medium
Work to Maximum Load = very low
Very heavy
Shrinkage, Tangential = small
Density (dry weight) = 31-37 lbs/cu. ft.
Dense
Compression strength (parallel to grain) = high
Bending strength (MOR) = very high
Bending strength (MOR) = low
Bending strength (MOR) = high

Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchBrown, W.H.,1969,Properties and uses of Tropical hardwoods in the United Kingdom. Part 1,Nonstructural properties and uses.,Conference on Tropical hardwoods SC-5/TN-5, Syracuse UniversityChudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Constantine, Jr. A.J. 1975. Know your Woods - A Complete Guide to Trees, Woods, and Veneers. Revised Edition, Revised by Harry J. Hobbs.Charles Scribner and Sons, New York.Erfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry DepartmentKryn, J.M., Forbes, E.W.,1959,The Woods of Liberia,U.S.A. Department of Agriculture,Forest Products Laboratory, Madison,,Report No. 2159Kukachka, B.F.,1970,Properties of Imported Tropical Woods,Forest Research Paper FPL 125Takahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7U.S.D.A. Forest Service,1974,Wood Handbook,U.S.A. Department of Agriculture, Forest Service Handbook,72WCMC. 1992. Conservation Status Listing: Trees and Timbers of the World. World Conservation Monitoring Center (WCMC, Plants Program, 219 Huntingdon Road, Cambridge, CB3 ODL, United Kingdom.
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