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Albizzia
Albizzia (Albizia spp.)

Family: Leguminosae

Common names: Albizzia, Ayinre, Kokko, Lebbek, Mduruasi, Mtanga, Mugavu, Nongo, Okuro, Uwowe

Distributed in: Burundi, Ghana, Kenya, Nigeria, Rwanda, Tanzania, Uganda (Africa, Oceania and S.E. Asia)

Distribution overview: Widely distributed throughout tropical Africa; mostly trees of the high forest are exploited, but also common in secondary forests.

Common uses: Boat building (general), Boxes and crates, Cabinetmaking, Furniture, Heavy construction, Joinery, Light construction, Millwork, Plywood, Veneer: decorative

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodWhite to yellow, Yellow.The grain isWavy, the textureMedium

Natural durability: Very durable, Very durable

Kiln Schedules: Uk=F US=T6D4/T3D3 Fr=6

Kiln Drying Rate: Slow (18-28 days for boards < 32 mm, to 52-84 days for boards >= 63 mm)

Ease of Drying: Slowly

Tree Identification: Bole/stem form is buttressed

Blunting Effect: Moderate

Cutting Resistance: Easy to saw

Gluing: Fairly Easy to Very Easy

Mortising: Fairly Difficult to Very Difficult

Moulding: Poor to Very Poor

Movement in Service: Poor to Very Poor

Planing: Poor to Very Poor

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Easy to machine

Steam bending: Moderate


Polishing: Satisfactory; Staining: Finish is generally satisfactory;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 576 kg/m3
Bending Strength 633 988 kg/cm2
Crushing Strength 395 592 kg/cm2
Hardness 701 kg
Impact Strength 58 cm
Shearing Strength 136 kg/cm2
Stiffness 95 110 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 2 %
Weight 560 464 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 9005 14056 psi
Density 36 lbs/ft3
Hardness 1547 lbs
Impact Strength 23 inches
Maximum Crushing Strength 5620 8424 psi
Shearing Strength 1947 psi
Stiffness 1354 1566 1000 psi
Weight 35 29 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 4 %

Hardness (side grain) = medium
Max. crushing strength = high
Bending strength (MOR) = medium
Max. crushing strength = medium
Bending strength (MOR) = low
Shrinkage, Tangential = very small
Shrinkage, Radial = very small
Modulus of Elasticity = moderate
Modulus of Elasticity (stiffness) = very low
Modulus of Elasticity (stiffness) = low
Hardness (side grain) = soft
Density (dry weight) = 38-45 lbs/cu. ft.
Density (dry weight) = 31-37 lbs/cu. ft.
Bending strength (MOR) = high

Armstrong, F.H.,1960,The Strength Properties of Timber,Forest Products Research Laboratory, London Bulletin,No.45Banks, C.H., Schoeman, J.P., Otto, K.P.,1977,The Mechanical Properties of Timbers with particular reference to South,Africa,South African Forestry Research Institute Bulletin,(Ed.,Schoeman, J.P. 1973 & Otto K.P. 1976,No.48Bois, P.J.,1966,The Strength Properties of Tanzania Timbers,Tanzania Forest Div. Util. Sec. Moshi Tech. Note, No.35Brown, 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.Forest Products Research Laboratory, U.K.,1951,Albizzia spp.,Forest Products Research Laboratory, Princes Risborough, Timber LeafletLavers, G.M.,1983,The Strength Properties of Timber (3rd ed. revised Moore G.L.,Forest Products Research Laboratory, Princes Risborough, Building Research,Establishment Report (formerly Bulletin No.50)Spalt, H.A., Stern, W.L.,1956,Survey of African woods 1,Tropical Woods,115(105,pp 13-38Tack, C.H.,1969,Uganda Timbers,Govt. Printer UgandaTanzania Forest Department,1960,The Natural Durability of Local Timbers,Tanzanian Forest Dept. Tech. Note,No.14Titmuss, F.H.,1965,Commercial Timbers of the World,Technical Press Ltd., London, 3rd editionUganda Forest Department,1954,Albizzia,Uganda Forestry Department Timber Leaflet,No.18
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