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Alu
Alu (Pseudocedrela kotschyi)

Family: Meliaceae

Common names: Alu, Bonga, Cedar mahogany, Chiadiri, Damba, Dituturi, Dry zone cedar, Emi gbegeri, Emigbegi, Eputon, Eputu, Hard cedar mahogany, Kedemponasi, Krubeta, Krubete, Kubetee, Kubiti, Kudomponasi, Kurubeta, Longo, Oput, Siadiri, Sigorli, Soasina, Sokuasui, Toman, Tonam, Tonas, Tuna, Zingan

Distributed in: Burkina Faso, Cameroon, Central African Republic, Chad, Ethiopia, Ghana, Ivory Coast, Mali, Niger, Nigeria, Sudan, Togo, Uganda (Africa)

Common uses: Boat building (general), Cabinetmaking, Canoes, Carvings, Cooperages, Flooring, Furniture, Joinery, Light construction, Musical instruments, Musical instruments: percussion, Plywood, Toys, Turnery, Vats, Vehicle parts

Colors: the heart isReddish brownand the sapwoodPinkish, Well defined.The grain isWeak figure, the textureMediumand the lusterLow

Natural durability: Susceptible to attack from powder post (Lyctid & Bostrychid) beetles, Susceptible to attack from termites (Isoptera)

LightInduced Color Change: Darker

Drying Defects: Moderate end spitting, Moderate twist/warp

Cutting Resistance: Cutting Resistance with green wood is easy

Gluing: Easy to glue

Nailing: Easy to nail

Planing: Planes well, to a good finish

Response to hand tools: Fairly Difficult to Difficult to Work

Screwing: Easy to screw ;

Polishing: Satisfactory;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 801 kg/m3
Bending Strength kg/cm2
Crushing Strength kg/cm2
Hardness kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 785 641 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Density 50 lbs/ft3
Weight 49 40 lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 8 %

Density (dry weight) = 46-52 lbs/cu. ft. 1
Density (dry weight) = 53-60 lbs/cu. ft
Shrinkage, Tangential = moderate
Shrinkage, Tangential = large
Shrinkage, Tangential = fairly large
Shrinkage, Radial = moderate
Shrinkage, Radial = large
Shrinkage, Radial = fairly large

Bentum, A.L.K.,1971,Properties of Ghanaian Timbers - Krubeta (Pseudocedrela kostchyi,F.P.R.I. Ghana,5(1/2, pp20-1Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchChalk, L.,1933,Twenty West African Timber Trees,Forest Trees and Timbers of the British Empire,Part 2Desch, H.E.,1948,The Cedars,Wood 13(2) pp40-3Eggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe UgandaGhana - Timber Marketing Board,1969,Ghana Hardwoods,Timber Marketing BoardIrvine, F.R.,1961,Woody Plants of Ghana,O.U.P. LondonKeay, R.W.J.,1964,Nigerian Trees Vol.2,Nigeria Federal Department of Forest Research, IbadanKennedy, J.D.,1936,Forest Flora of Southern Nigeria,Government Printer LagosKinloch, D., Miller, W.A.,1949,Gold Coast Timbers,Govt. Printer Gold CoastUnwin, A.H.,1920,West African Forests and Forestry,T. Fisher Unwin Ltd. London
*Come interpretare i dati (manleva su eventuali imprecisioni)