
Wallaba (Eperua falcata)
Family: Leguminosae
Common names: Apa, Apazeiro, Bainha de espada, Bijhout, Bijlhout, Bioudou, Bois de sabre, Eperu, Eperua falcata, Espadeira, Ituri, Ituri wallaba, Itusi wallaba, Jacare copahiba, Jebaro, Jebaru-rana, Palo machete, Parewe, Parive, Pois sabre, Soft wallaba, Uapa, Uapa tabaco, Vouapa-tabaca, Walaba, Walaba ituri walaba, Wallaba, Wallabaholz, Wapa, Wapa gras, Wapa huileux, Wapa patouve, Water wallaba, White wallaba, Woapa, Woapa huileux, Wopa, Wouapa, Yoboko
Distributed in: Brazil, French Guiana, Guyana, Suriname, Venezuela (Central America, Latin America)
Distribution overview: Generally found in the Guianas and into Venezuela and the Amazon region of northern Brazil.
Common uses: Boat building: decking, Boat building: framing, Bridge construction, Building construction, Building materials, Cabin construction, Charcoal, Construction, Cooperages, Crossties, Decks, Factory construction, Factory flooring, Flooring, Flooring: commercial heavy traffic, Flooring: industrial heavy traffic, Fuelwood, Furniture, Heavy construction, Joinery (external): ground contact, Joinery, Light construction, Marine construction, Mine timbers, Particleboard, Piling, Poles, Posts, Pulp/Paper products, Railroad ties, Roofing, Shingles, Structural work, Sub-flooring, Turnery, Utility poles, Vats, Vehicle parts, Wharf construction, Wheel spokes, Wheels
Product sources: The ITTO reports that timber production from the species is rather low. The timber is exported in low quantities.
Environment profile: Vulnerable
Colors: the heart isRed, Reddish brownand the sapwoodWhite, White to yellow.The grain isWeak figure, the textureMedium to coarseand the lusterDull
Natural durability: Susceptible to marine borer attack, Very durable
Odor: No characteristic taste
LightInduced Color Change: Darker
Kiln Schedules: Kiln Drying Rate (in days) is rather slow
Kiln Drying Rate: Very slow (>28 days for boards < 32 mm, to >84 days for boards >= 63 mm)
Drying Defects: Slight end splitting, Warping can be expected
Ease of Drying: Moderately Difficult to Difficult
Tree Identification: Bole/stem form is cylindrical
Comments: General finishing qualities are rated as good General finishing qualities are rated as poor General finishing qualities are rated as satisfactory
Blunting Effect: Moderate effect
Boring: Fairly easy to very easy
Carving: Fairly Easy to Very Easy
Cutting Resistance: Cutting Resistance with dry wood is easy
Gluing: Glues well
Mortising: Fairly Easy to Very Easy
Moulding: Fairly Easy to Very Easy
Movement in Service: Fairly Easy to Very Easy
Nailing: Holds nails well, Pre-boring recommended
Planing: Planes well, to a good finish
Resistance to Impregnation: Untreatable
Resistance to Splitting: Poor
Response to hand tools: Variable qualities
Routing recessing: Fairly Easy to Very Easy
Steam bending: Moderate
Turning: Good results
Painting: Satisfactory; Polishing: Satisfactory; Staining: Reacts with Iron to discolour wood;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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 |
 |
 |
| Item |
Green |
Dry |
Metric |
| Specific Gravity |
0,7 |
|
|
| Density |
|
897 |
kg/m3 |
| Bending Strength |
997 |
1430 |
kg/cm2 |
| Crushing Strength |
567 |
778 |
kg/cm2 |
| Hardness |
|
900 |
kg |
| Impact Strength |
|
71 |
cm |
| Shearing Strength |
|
120 |
kg/cm2 |
| Stiffness |
152 |
176 |
1000 kg/cm2 |
| Tangential Shrinkage |
6 |
|
% |
| Radial Shrinkage |
3 |
|
% |
| Weight |
897 |
689 |
kg/m3 |
| Maximum Load |
|
|
cm-kg/cm3 |
| Toughness |
|
|
cm-kg |
| Static Bending |
|
|
kg/cm2 |
|
 |  |  |  | | Item | Green | Dry | English | | Bending Strength | 14185 | 20341 | psi | | Density | | 56 | lbs/ft3 | | Hardness | | 1986 | lbs | | Impact Strength | | 28 | inches | | Maximum Crushing Strength | 8076 | 11074 | psi | | Shearing Strength | | 1716 | psi | | Stiffness | 2175 | 2515 | 1000 psi | | Specific Gravity | 0.7 | | | | Weight | 56 | 43 | lbs/ft3 | | Radial Shrinkage | 3 | | % | | Tangential Shrinkage | 6 | | % | | Volumetric Shrinkage | 9 | | % | |
Bending strength (MOR) = high 0 Modulus of Elasticity (stiffness) = high 0 Density (dry weight) = 53-60 lbs/cu. ft 0 Max. crushing strength = high 1 Hardness (side grain) = medium Shrinkage, Tangential = small Shrinkage, Tangential = moderate Shrinkage, Radial = very small Hardness (side grain) = hard Shrinkage, Volumetric = small Shrinkage, Radial = small Shearing strength (parallel to grain) = medium Shearing strength (parallel to grain) = low Max. crushing strength = very high Shrinkage, Volumetric = moderate Shrinkage, Radial = moderate Density (dry weight) = 61-67 lbs/cu.ft Density (dry weight) = 46-52 lbs/cu. ft. Shrinkage, Tangential = fairly large Modulus of Elasticity (stiffness) = medium Toughness-Hammer drop (Impact Strength) = low Shrinkage, Tangential = very small Shrinkage, Tangential = large Shrinkage, Radial = large Shearing strength (parallel to grain) = very low Hardness (side grain) = soft Bending strength (MOR) = very high Bending strength (MOR) = medium
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