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Ditta 5
Indirizzo: via dei platani 4 liguria
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Ditta 1
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Bomanga
Bomanga (Brachystegia laurentii)

Family: Leguminosae

Common names: Achi, Akolodo, Bomanga, Ekop evene, Ekop lele, Meblo, Mendou, Naga, Ngu, Nzang, Okwen, Yegna

Distributed in: Benin, Cameroon, Gabon, Gambia, Ghana, Guinea Bissau, Guinea, Ivory Coast, Liberia, Nigeria, Senegal, Sierra Leone, Togo, Zaire (Africa)

Distribution overview: West Africa. Common in the wetter high forests of Nigeria.

Common uses: Cooperages, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Domestic flooring, Figured veneer, Fine furniture, Floor lamps, Flooring, Furniture , Furniture components, Joinery, Kitchen cabinets, Living-room suites, Office furniture, Parquet flooring, Plywood, Rustic furniture, Sub-flooring, Tables , Utility furniture, Veneer

Environment profile: Very little threat to its natural environment.

Tree size: Tree height is 10-20 m

Colors: the heart isYellow, Yellowish brownand the sapwoodYellow, Yellowish.The grain isStraight, the textureMedium coarse to coarse and the lusterMedium

Natural durability: Sapwood susceptible to attack by powder post beetles, Very low natural resistance to decay fungi

Odor: No specific smell or taste

Kiln Schedules: T6 - D2 (4/4) US

Drying Defects: Expect resin/gum exudation, Severe surface checking

Ease of Drying: Shrinkage Green to12% MC

Comments: Abnormal Wood Tissue Some authorities identify this species and B. zenkeri as the same, i.e., B. laurentii = B. zenkeri . Tension wood may be present. Material containing tension wood is highly prone to distortion during drying.

Blunting Effect: Blunting effect on sawing is mild

Cutting Resistance: Easy to saw

Gluing: Very good properties

Moulding: Oulding properties are good

Movement in Service: Oulding properties are good

Nailing: Holds nails well, Nails well without pre-boring

Planing: Easy to plane

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Easy to Work

Sanding: Good sanding qualities

Steam bending: Good


Painting: Good; Polishing: Very Good to Excellent; Staining: Stains well and easily ; Varnishing: Good;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,48 0,57
Density 608 kg/m3
Bending Strength 746 921 kg/cm2
Crushing Strength 378 479 kg/cm2
Hardness 635 kg
Impact Strength 88 55 cm
Shearing Strength 183 kg/cm2
Stiffness 92 153 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage %
Weight kg/m3
Maximum Load 0,98 0,98 cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 10613 13103 psi
Density 38 lbs/ft3
Hardness 1401 lbs
Impact Strength 35 22 inches
Maximum Crushing Strength 5381 6821 psi
Shearing Strength 2607 psi
Stiffness 1317 2185 1000 psi
Work to Maximum Load 14 14 inch-lbs/in3
Specific Gravity 0.48 0.57
Weight 51 36 lbs/ft3

Resists denting and marring
Max. crushing strength = high
Hardness = medium
Density = high
Compression strength (parallel to grain) = high
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 ResearchChudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.ITTO.1986.Tropical Timber Atlas, Volume 1 - Africa.International Tropical Timber Organization (ITTO) and Centre Technique Forestier Tropical (CTFT, 45bis, Avenue de la Belle Gabrielle, Nogent-sur-Marne Cedex, France.Lavers, G. M.1966.The Strength Properties of Timbers.Forest Products Research Bulletin, No. 50. Ministry of Technology, Her Majesty's Stationery Office, London.Lincoln, W.A. 1986. World Woods in Color. Linden Publishing Co. Inc., Fresno, California.WCMC. 1992. Conservation Status Listing - Trees and Timbers of the World. World Conservation Monitoring Center-Plants Programme, Cambridge, CB3 ODL, United Kingdom.
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