Ataa (Pentaclethra macrophylla)
Family: Leguminosae
Common names: Akpaka, Althawah, An-fal, Apara, Ataa, Atawa, Atawah, Ateba, Atewa, Atowa, Atta bean, Bala, Bali, Bbiah, Bemba, Blay-bu, Combolo, Djong-tu, Ebal, Ebe, Eklo, Ekuama, Ekuana, Essiri, Fa, Fa-weli, Faa, Fae, Fai, Fakha, Fawei, Gbangban, Gbiah, Kekung, Kenuri, Kombolo, Kommott, Lubamba, M'vanza, Marrone, Mba, Mbala, Mouala, Moulla-panza, Mubala, Nkpa, Nsangabare, Ogba, Oil bean tree, Okpagha, Okuw, Opaga, Otiabor, Ovala, Owala, Sicupira Africana, Tsaklo, Tshibambabamba, Ugba, Ukana, Ukpaghan, Ukpakara, Ukuna, Wild locust
Distributed in: Angola, Benin, Cameroon, Congo, Gabon, Ghana, Guinea Bissau, Guinea, Ivory Coast, Liberia, Nigeria, Senegal, Sierra Leone, Zaire (Africa)
Distribution overview: The species is widely distributed in tropical Africa. It is also often cultivated as a roadside tree.
Common uses: Agricultural implements, Barge fenders, Boat building (general), Bridge construction, Building construction, Building materials, Cabin construction, Charcoal, Construction, Crossties, Decks, Docks, Dockwork, Domestic flooring, Excelsior, Factory construction, Flooring, Fuelwood, Handles, Harbor work, Heavy construction, Joinery, Light construction, Marine construction, Millwork, Mine timbers, Naval architecture, Parquet flooring, Piling, Poles, Raft floats, Rafts, Railroad ties, Shafts/Handles, Shipbuilding, Sporting Goods, Sub-flooring, Tool handles, Vats, Vehicle parts, Wharf construction
Environment profile: Very secure within its natural range
Tree size:
Trunk diameter is about 36 inches (100 cm).
Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodWell defined, White to yellow.The grain isVariable figure, the textureMedium coarse to coarseand the lusterLustrous
Natural durability: Very durable, Withstands adverse effects of weather
Odor: No specific smell or taste
LightInduced Color Change: None
Kiln Schedules: Dry at a slow speed
Drying Defects: Distortion (twist/warp) is likely, Moderate surface checking
Ease of Drying: Requires care to minimize degrade
Tree Identification: Bole/stem form is straight
Comments: General finishing qualities are rated as satisfactory Wood and bark are used for medicinal purposes. The wood has good fuel properties and is used for charcoal. The tree produces an edible fruit and the seeds yield up to 45% oil used for lubrication, candle and soap-making
Blunting Effect: Blunting effect on sawing dry wood is severe
Cutting Resistance: Cutting Resistance with green wood is easy
Nailing: Easy to nail, Nailing properties are variable
Planing: Easy to plane
Resistance to Impregnation: Resistant heartwood
Response to hand tools: Moderate working qualities
Sanding: Requires care in sanding
Screwing: Easy to screw
; Turning:
The material is generally difficult to work with ordinary tools in most machining operations, including turning, moulding, mortising, and boring
Painting: Good; Polishing: Poor; Varnishing: Good;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
 |
 |
 |
 |
Item |
Green |
Dry |
Metric |
Specific Gravity |
|
0,83 |
|
Density |
|
865 |
kg/m3 |
Bending Strength |
1090 |
1487 |
kg/cm2 |
Crushing Strength |
|
173 |
kg/cm2 |
Hardness |
|
1170 |
kg |
Impact Strength |
|
|
cm |
Shearing Strength |
|
156 |
kg/cm2 |
Stiffness |
158 |
175 |
1000 kg/cm2 |
Tangential Shrinkage |
9 |
|
% |
Radial Shrinkage |
6 |
|
% |
Weight |
801 |
689 |
kg/m3 |
Maximum Load |
|
|
cm-kg/cm3 |
Toughness |
|
393 |
cm-kg |
Static Bending |
|
855 |
kg/cm2 |
|
 |  |  |  | Item | Green | Dry | English | Bending Strength | 15504 | 21161 | psi | Crushing Strength | | 2470 | psi | Density | | 54 | lbs/ft3 | Hardness | | 2581 | lbs | Maximum Crushing Strength | 6899 | 10524 | psi | Shearing Strength | | 2225 | psi | Static Bending | | 12162 | psi | Stiffness | 2249 | 2490 | 1000 psi | Toughness | | 342 | inch-lbs | Specific Gravity | | 0.83 | | Weight | 50 | 43 | lbs/ft3 | Radial Shrinkage | 6 | | % | Tangential Shrinkage | 9 | | % | Volumetric Shrinkage | 13 | | % | |
Mor/Bending strength = high Max. crushing strength = high 46-52 lbs/cu. ft. Very high Modulus of Elasticity (stiffness) = high Very hard Hardness (side grain) = hard Density (dry weight) = 53-60 lbs/cu. ft. Shrinkage, Volumetric = moderate Shrinkage, Tangential = large Shrinkage, Radial = large Shearing strength (parallel to grain) = medium Large 61-67 lbs/cu. ft. Very high Medium Fairly large Fairly large Fairly large 67-75 lbs/cu. ft.
The species has very high bending strength, and is much stronger than Teak in the air-dry condition (about 12 percent moisture content). Maximum crushing strength, or compression parallel to grain, is exceptionally high. It is hard and superior to Teak and probably Mahogany. The species has very high density.
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