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Fornitori

Ditta 5
Indirizzo: via dei platani 4 liguria
Tel.: +39 456 5664 54

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Ditta 4
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Tel.: +39 456 5664 54

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Ditta 3
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Ditta 2
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Ditta 1
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Tel.: +39 456 5664 54

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Ditta 0
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Tel.: +39 456 5664 54

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African oak
African oak (Oldfieldia africana)

Family: Euphorbiaceae

Common names: African oak, African teak, Angouran, Dantoue, Esson, Esson fu, Esui, Etu, Etui, Fou, Fu, Ka-tosa, Kpaolai, Lib-kpaolai, Mbaimba, Pau-lai, Real African oak, Rla, Saintue, Saye, Tanalia, Tortorza, Turtosa, Vesenbata

Distributed in: Cameroon, Ivory Coast, Liberia, Sierra Leone (Africa)

Common uses: Agricultural implements, Bearings & bushings, Boat building (general), Bridge construction, Carvings, Decks, Flooring, Flooring: industrial heavy traffic, Furniture, Heavy construction, Joinery, Light construction, Marine construction, Mathematical instruments, Millwork, Mine timbers, Musical instruments, Paneling, Poles, Posts, Railroad ties, Sporting Goods, Textile equipment, Tool handles, Turnery, Vats, Vehicle parts

Tree size: Tree height is 30-40 m

Colors: the heart isReddish brown, Yellowand the sapwoodDifferent than heartwood, Paler than heartwood.The grain isWavy, the textureMediumand the lusterLustrous

Natural durability: Susceptible to insect attack, Very durable

Drying Defects: Slight surface checking

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good

Gluing: Easy to glue

Mortising: Easy to mortise

Moulding: Easy to mould

Movement in Service: Easy to mould

Nailing: Difficult to nail, Fairly Easy to Very Easy

Planing: Planes well, to a good finish

Response to hand tools: Easy to Work

Turning: Easy to turn

Polishing: Satisfactory; Staining: Reacts with Iron to discolour wood ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 977 kg/m3
Bending Strength 954 1473 kg/cm2
Crushing Strength 485 699 kg/cm2
Hardness 901 kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 181 211 1000 kg/cm2
Tangential Shrinkage 7 %
Radial Shrinkage 3 %
Weight 961 769 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 13576 20956 psi
Density 61 lbs/ft3
Hardness 1987 lbs
Maximum Crushing Strength 6899 9945 psi
Stiffness 2578 3011 1000 psi
Weight 60 48 lbs/ft3
Radial Shrinkage 3 %
Tangential Shrinkage 7 %
Volumetric Shrinkage 15 %

Density (dry weight) = 61-67 lbs/cu. ft
Max. crushing strength = high
Shrinkage, Radial = small
Bending strength (MOR) = high
Shrinkage, Volumetric = large
Shrinkage, Tangential = small
Shrinkage, Tangential = moderate
Shrinkage, Tangential = fairly large
Shrinkage, Radial = moderate
Modulus of Elasticity (stiffness) = very high
Hardness (side grain) = medium
Hardness (side grain) = hard
Density (dry weight) = 53-60 lbs/cu. ft

Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchCooper, G.P., Record, S.J.,1931,The Evergreen Forests of Liberia,Yale School Forestry Bulletin,31,pp1-153Dudek, S.,1981,Lesser Known Liberian Timber Species,German Agency for Technical Cooperation GermanyFrance - Comite Nacional des Bois Coloniaux,1931,Etude Physique et Mecanique des Bois Coloniaux,Assoc. Colonies-Sciences & Comite National des Bios Coloniaux, Paris,,FranceKryn, J.M., Forbes, E.W.,1959,The Woods of Liberia,U.S.A. Department of Agriculture,Forest Products Laboratory, Madison,,Report No. 2159Meniaud, J., Bretonnet, F.,1926,Les Bois Coloniaux d'Afrique dans l'Industrie,Publ. de l'Agence Gen. des ColoniesSavill, P.S., Fox, J.E.D.,1967,Trees of Sierra LeoneTakahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Unwin, A.H.,1920,West African Forests and Forestry,T. Fisher Unwin Ltd. LondonVoorhoeve, A.G.,1965,Liberian High Forest Trees,Centre for Agric. Publishing and Documentation, Wageningen
*Come interpretare i dati (manleva su eventuali imprecisioni)