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African zebrawoodAfrican zebrawood
African zebrawood (Microberlinia bisulcata)

Family: Caesalpiniaceae

Common names: African zebrawood, Allen ele, Amouk, Izingana, Zebrano, Zingana

Distributed in: Cameroon, Congo, Equatorial Guinea, Gabon (Africa)

Common uses: Boat building (general), Cabinetmaking, Flooring, Furniture, Handles: general, Heavy construction, Ladders, Light construction, Mine timbers, Paneling, Plywood, Railroad ties, Skis, Sporting Goods, Tool handles, Toys, Vehicle parts, Veneer: decorative

Tree size: Trunk diameter is 150-200 cm

Colors: the heart isRed, Yellow to golden-yellow to orangeand the sapwoodWell defined, White to yellow.The grain isWavy, the textureVery fineand the lusterMedium

Natural durability: Resistant to attack from termites (Isoptera), Very durable

Silica Content: High

Drying Defects: Moderate surface checking, Splitting

Ease of Drying: Fairly Easy

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as satisfactory

Blunting Effect: High to severe

Boring: Fairly easy to very easy

Carving: Fairly Easy to Very Easy

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Gluing: Fairly Easy to Very Easy

Mortising: Fairly Easy to Very Easy

Moulding: Fairly Easy to Very Easy

Movement in Service: Fairly Easy to Very Easy

Nailing: Holds nails well, Pre-Boring Recommended

Planing: Poor planing finish

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Easy to machine

Routing recessing: Fairly Easy to Very Easy

Sanding: Good sanding finish

Veneering qualities: Easy to cut, Suitable for slicing

Steam bending: Fairly Easy to Very Easy

Screwing: Fairly Difficult to Very Difficult, Pre-boring recommended; Turning: Fairly Easy to Very Easy

Polishing: Satisfactory; Varnishing: Good;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 753 kg/m3
Bending Strength 997 1500 kg/cm2
Crushing Strength 485 699 kg/cm2
Hardness 752 kg
Impact Strength cm
Shearing Strength 109 kg/cm2
Stiffness 117 135 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 737 592 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 14188 21340 psi
Density 47 lbs/ft3
Hardness 1658 lbs
Maximum Crushing Strength 6899 9945 psi
Shearing Strength 1560 psi
Stiffness 1665 1923 1000 psi
Weight 46 37 lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 9 %

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

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 DepartmentFrance - C.T.F.T.,1966,Bois Tropicaux,C.T.F.T. Publ.,12France - C.T.F.T.,Recuil de Fiches Techniques,C.T.F.T.Hughes, J.F.,1971,The Principal Timber Trees of Cameroon,Unpublished dataRevue des Bois et de ses Applications,1955,Zingana (Microberlinia brazzavillensis and M. bisulcata,Revue des Bois et de ses Applications,10(11, p29Sallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TTakahashi, 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)