Alep (Desbordesia pierreana)
Family: Simaroubaceae
Common names: Alep, Alo, Aloi, Banga, Bwiba njoc, Kawo, Oman, Omang, Oteva, Teva
Distributed in: Gabon, Nigeria, Zaire (Africa)
Common uses: Agricultural implements, Boat building (general), Building construction, Building materials, Cabin construction, Construction, Crossties, Domestic flooring, Excelsior, Factory construction, Factory flooring, Flooring, Heavy construction, Joinery, Millwork, Mine timbers, Parquet flooring, Pile-driver cushions, Piling, Poles, Posts, Railroad ties, Sporting Goods, Sub-flooring, Turnery, Vehicle parts
Environment profile: Status has not been officially assessed
Tree size: Trunk diameter is 150-200 cm
Colors: the heart isWhite, Yellowand the sapwoodWhite to yellow, Yellow.The grain isStraight, the textureMediumand the lusterMedium
Natural durability: Susceptible to insect attack, Very durable
Odor: No specific smell or taste
Silica Content: Siliceous
Kiln Drying Rate: Very slow
Drying Defects: Moderate surface checking, Splitting
Ease of Drying: Slowly
Tree Identification: Bole/stem form is buttressed
Comments: General finishing qualities are rated as good
Blunting Effect: High to severe
Boring: Fairly easy to very easy
Carving: Fairly Easy to Very Easy
Cutting Resistance: Moderate to saw
Gluing: Very good properties
Mortising: Fairly Easy to Very Easy
Moulding: Fairly Easy to Very Easy
Movement in Service: Fairly Easy to Very Easy
Nailing: Satisfactory nailing properties, Very Good to Excellent
Planing: Very Heavy
Resistance to Impregnation: Resistant sapwood
Response to hand tools: Moderate working qualities
Routing recessing: Fairly Easy to Very Easy
Veneering qualities: No drying degrade, Suitable for peeling
Screwing: Pre-boring recommended, Very Good to Excellent Results; Turning: Fairly Easy to Very Easy
Painting: Very Good to Excellent; Polishing: Very Good to Excellent; Staining: Very Good to Excellent; Varnishing: Very Good to Excellent;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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Item |
Green |
Dry |
Metric |
Specific Gravity |
|
|
|
Density |
|
801 |
kg/m3 |
Bending Strength |
1279 |
1826 |
kg/cm2 |
Crushing Strength |
632 |
869 |
kg/cm2 |
Hardness |
|
1333 |
kg |
Impact Strength |
|
|
cm |
Shearing Strength |
|
155 |
kg/cm2 |
Stiffness |
166 |
193 |
1000 kg/cm2 |
Tangential Shrinkage |
7 |
|
% |
Radial Shrinkage |
4 |
|
% |
Weight |
849 |
785 |
kg/m3 |
Maximum Load |
|
|
cm-kg/cm3 |
Toughness |
|
|
cm-kg |
Static Bending |
|
|
kg/cm2 |
|
 |  |  |  | Item | Green | Dry | English | Bending Strength | 18204 | 25982 | psi | Density | | 50 | lbs/ft3 | Hardness | | 2940 | lbs | Maximum Crushing Strength | 8990 | 12374 | psi | Shearing Strength | | 2205 | psi | Stiffness | 2373 | 2752 | 1000 psi | Weight | 53 | 49 | lbs/ft3 | Radial Shrinkage | 4 | | % | Tangential Shrinkage | 7 | | % | Volumetric Shrinkage | 12 | | % | |
Bending strength (MOR) = very high Max. crushing strength = very high Hardness (side grain) = very hard Shrinkage, Volumetric = moderate Shrinkage, Tangential = very small Shrinkage, Tangential = large Shrinkage, Radial = very small Shrinkage, Radial = small Shrinkage, Radial = large Max. crushing strength = high Shrinkage, Volumetric = large Shrinkage, Tangential = small Shrinkage, Tangential = moderate Shrinkage, Radial = moderate Shearing strength (parallel to grain) = medium Modulus of Elasticity (stiffness) = very high Modulus of Elasticity (stiffness) = high Density (dry weight) = 67-75 lbs/cu. ft. Density (dry weight) = 61-67 lbs/cu. ft Bending strength (MOR) = medium Bending strength (MOR) = high
Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchErfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry DepartmentFrance - C.T.F.T.,Resultats des Observations et des Essais Effectues au CTFT sur :Angueuk -,Ongokea gore,C.T.F.T., No.140France - C.T.F.T.,Resultats des Observations et des essais effectues au CTFT sur Alep,C.T.F.T., No.146Hedin, L.,1930,Etude sur la Foret et les Bois du Cameroun,Haut-Commissaire de la CamerounHughes, J.F.,1971,The Principal Timber Trees of Cameroon,Unpublished dataKeay, R.W.J.,1964,Nigerian Trees Vol.2,Nigeria Federal Department of Forest Research, IbadanMeniaud, J., Bretonnet, F.,1926,Les Bois Coloniaux d'Afrique dans l'Industrie,Publ. de l'Agence Gen. des ColoniesSaint-Aubin, G. de,1963,La Foret du Gabon,CTFT Publ., No.21Sallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TSallenave, P.,1971,Proprietes Physiques et Mecaniques des Bois Tropicaux (Deuxieme,Supplement,C.T.F.T.Takahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7
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