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Alokwe
Alokwe (Sapium ellipticum)

Family: Euphorbiaceae

Common names: Alokwe, Bileri, Bonyurome, Einiu, Elipilepo, Jumping seed tree, Msese, Muhasi tureret, Mujasa, Mujasajasa, Mujustet, Musaja, Musanvuma, Musasa, Musasia, Musesa, Musoso, Muthathi, Omuchasa, Omusasa, Omushasha, Springsaadboom, Tatahiro

Distributed in: Kenya, South Africa, Uganda, Zimbabwe (Africa)

Common uses: Agricultural implements, Boat building (general), Boxes and crates, Cabinetmaking, Carvings, Flooring: industrial heavy traffic, Furniture, Handles: general, Ladders, Light construction, Toys, Vehicle parts

Tree size: Trunk diameter is 150-200 cm

Colors: the heart isRed, White to creamand the sapwoodWhite, Yellow.The grain isOther figure, the textureMedium to coarseand the lusterMedium

Natural durability: Susceptible to insect attack, Very durable

Drying Defects: Severe surface checking, Severe twisting/warping

Tree Identification: Bole/stem form is straight

Cutting Resistance: Fairly Difficult to Very Difficult to saw

Gluing: Moderate gluing properties

Moulding: Poor to Very Poor

Movement in Service: Poor to Very Poor

Nailing: Holds nails well, Pre-Boring Recommended

Planing: Easy to plane

Response to hand tools: Moderate working qualities

Screwing: Pre-boring recommended, Screwing yields good results; Turning: Fairly Easy to Very Easy

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

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 576 kg/m3
Bending Strength 654 1024 kg/cm2
Crushing Strength 275 449 kg/cm2
Hardness kg
Impact Strength cm
Shearing Strength 132 kg/cm2
Stiffness 117 135 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 6 %
Weight 560 448 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 9310 14566 psi
Density 36 lbs/ft3
Maximum Crushing Strength 3916 6397 psi
Shearing Strength 1883 psi
Stiffness 1665 1923 1000 psi
Weight 35 28 lbs/ft3
Radial Shrinkage 6 %
Tangential Shrinkage 8 %

Density (dry weight) = 38-45 lbs/cu. ft.
Density (dry weight) = 31-37 lbs/cu. ft.
Shrinkage, Radial = large
Modulus of Elasticity (stiffness) = medium
Max. crushing strength = medium
Bending strength (MOR) = medium
Shrinkage, Tangential = moderate
Shrinkage, Tangential = large
Shrinkage, Tangential = fairly large
Shrinkage, Radial = fairly large
Shearing strength (parallel to grain) = medium
Shearing strength (parallel to grain) = low

Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchDale, I.R., Greenway, P.J.,1961,Kenya Trees and Shrubs,Buchanans Kenya Estates Ltd. Nairobi Hatchards LondonEggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe UgandaKeay, R.W.J., et al,1960,Nigerian Trees Vol.1,Nigeria Federal Department of Forest Research, IbadanKeay, R.W.J.,1989,Trees of Nigeria,Oxford Science Publications, Clarendon Press, OxfordLee, Y.H., Lopez, D.T.,1968,The Machining Properties of some Malayan Timbers,Malayan Forester,3,pp194-210Palgrave, K.C.,1977,Trees of Southern Africa,Cape Town South AfricaSim, T.R.,1921,Native Trees of South Africa,Union of South Africa Department of Mines and Industries Memoir No.3Tack, C.H.,1969,Uganda Timbers,Govt. Printer UgandaUganda Forest Department,1969,The Shrinkage of Some Ugandan Timbers,Uganda Forestry Department Timber Leaflet,No.47Wimbush, S.H.,1950,Catalogue of Kenya Timbers,Govt. Printer Nairobi Kenya
*Come interpretare i dati (manleva su eventuali imprecisioni)