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Fornitori

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

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

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Ditta 3
Indirizzo: via dei platani 4 liguria
Tel.: +39 456 5664 54

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Ditta 2
Indirizzo: via dei platani 4 liguria
Tel.: +39 456 5664 54

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Ditta 1
Indirizzo: via dei platani 4 liguria
Tel.: +39 456 5664 54

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Ditta 0
Indirizzo: via dei platani 4 liguria
Tel.: +39 456 5664 54

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Efok bilobi
Efok bilobi (Cola spp.)

Family: Sterculiaceae

Common names: Efok bilobi, Efok oswe, Taba

Distributed in: Ghana, Uganda (Africa)

Common uses: Boat building (general), Boxes and crates, Carvings, Flooring, Fuelwood, Furniture, Heavy construction, Joinery, Light construction, Millwork, Mine timbers, Railroad ties, Sporting Goods, Vehicle parts

Tree size: Tree height is 20-30 m

Colors: the heart isPale brown, Redand the sapwoodWhite to yellow, Yellow.The grain isStraight, the textureMedium to coarseand the lusterMedium

Natural durability: Sapwood is susceptible to wood staining fungal attack, Susceptible to attack from powder post (Lyctid & Bostrychid) beetles

LightInduced Color Change: None

Drying Defects: Checking, Distortion

Ease of Drying: Reconditioning Treatement

Tree Identification: Bole/stem form is buttressed

Boring: Fairly easy to very easy

Carving: Fairly Easy to Very Easy

Cutting Resistance: Easy to saw

Gluing: Fair to Good Results

Mortising: Fairly Easy to Very Easy

Moulding: Fairly Easy to Very Easy

Movement in Service: Fairly Easy to Very Easy

Nailing: Fairly Easy to Very Easy, Very Good to Excellent

Planing: Fairly Easy to Very Easy

Response to hand tools: Responds Readily

Routing recessing: Fairly Easy to Very Easy

Sanding: Very Good to Excellent Results

Turning: Fairly Easy to Very Easy

Polishing: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 833 kg/m3
Bending Strength 954 1473 kg/cm2
Crushing Strength 485 699 kg/cm2
Hardness 752 kg
Impact Strength cm
Shearing Strength 109 kg/cm2
Stiffness 152 175 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 817 657 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 13576 20956 psi
Density 52 lbs/ft3
Hardness 1658 lbs
Maximum Crushing Strength 6899 9945 psi
Shearing Strength 1560 psi
Stiffness 2167 2494 1000 psi
Weight 51 41 lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 8 %

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
Shearing strength (parallel to grain) = low
Modulus of Elasticity (stiffness) = high
Max. crushing strength = high
Hardness (side grain) = medium
Density (dry weight) = 46-52 lbs/cu. ft.
Bending strength (MOR) = high

Banks, C.H. and J.P. Schoeman. 1963. Railway Sleeper and Crossing Timbers. Bulletin No. 41, Republic of South Africa. The Government Printer, Pretoria, South Africa.Banks, 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.48Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchCudjoe, F.S.,1969,A Key to the Family Sterculiaceae in Ghana,Forest Prod. Res. Inst. Ghana Tech. Note, No.7Irvine, F.R.,1961,Woody Plants of Ghana,O.U.P. LondonKryn, J.M., Forbes, E.W.,1959,The Woods of Liberia,U.S.A. Department of Agriculture,Forest Products Laboratory, Madison,,Report No. 2159
*Come interpretare i dati (manleva su eventuali imprecisioni)