Aramatta (Diplotropis purpurea)
Family: Leguminosae
Common names: Aji, Alcornoque, Aramatta, Araumatta, Baakia kiabici, Black sucupira, Botonallare, Coeur dehors, Congrio, Kabbes, Kiabici oudou, Konatopo, Levarte kabbes, Levorte kabbes, Mach, Ogoru, Olgoi, Peonia, Sapupira, Sapupira da varzea, Sucupipa, Sucupira, Sucupira assu, Sucupira-parda, Sucupira-preta, Supupira, Swarte kabbes, Taku, Tataboo, Tatabu, Zapan negro, Zwart kabbes, Zwarte kabbes
Distributed in: Brazil, French Guiana, Guyana, Suriname, Venezuela (Central America, Latin America)
Distribution overview: Uplands of the Guianas and in Para and Amazonas in Brazil. Fairly common in French Guiana, infrequent in Surinam and Guyana. Also in Venezuela.
Common uses: Agricultural implements, Bent Parts, Boat building, Boat building: decking, Boat building: framing, Bridge construction, Building construction, Building materials, Cabin construction, Cabinetmaking, Canoes, Chairs, Chests, Construction, Crossties, Desks, Dining-room furniture, Domestic flooring, Door, Drawer sides, Factory construction, Factory flooring, Fine furniture, Flooring, Furniture , Furniture components, Furniture squares or stock, Furniture, Handles, Hatracks, Heavy construction, Joinery, Kitchen cabinets, Lifeboats, Light construction, Living-room suites, Marine construction, Millwork, Mine timbers, Moldings, Office furniture, Paneling, Parquet flooring, Piling, Poles, Posts, Radio - stereo - TV cabinets, Railroad ties, Rustic furniture, Shafts/Handles, Shipbuilding, Stools, Structural work, Sub-flooring, Tool handles, Turnery, Utility furniture, Vehicle parts, Veneer: decorative, Wheel spokes, Wheels
Product sources: The ITTO reports that the species is a fairly important source of timber. The timber is exported regularly but in limited quantities.
Environment profile: Status unknown due to inadequate information
Tree size: Trunk diameter is 150-200 cm
Colors: the heart isWaxy appearance, Yellowand the sapwoodWell defined, White to yellow.The grain isWavy, the textureMediumand the lusterPronounced
Natural durability: Susceptible to marine borer attack, Very durable
Odor: No specific smell or taste
Silica Content: Siliceous
Kiln Schedules: T7 - B3 (4/4) US
Drying Defects: Slight surface checking, Slight twist/warp
Ease of Drying: Thick Stock Requires Care
Tree Identification: Bole/stem form is straight
Comments: General finishing qualities are rated as good The wood is similar to the African species, Wenge (Millettia laurenti ) in many mechanical properties. It is superior to hickory (Carya ) and White oak (Quercus alba ).
Blunting Effect: Moderate
Boring: Fairly easy to very easy
Carving: Fairly Easy to Very Easy
Cutting Resistance: Fairly Difficult to Very Difficult to saw
Gluing: Fairly Difficult to Very Difficult
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: Planes to a poor finish
Resistance to Impregnation: Resistant sapwood
Response to hand tools: Moderate working qualities
Routing recessing: Fairly Easy to Very Easy
Sanding: Moderately difficult to work with ordinary tools
Veneering qualities: No drying degrade. Dries flat without splitting, There is slight to moderate drying degrade and the potential for buckles and splits
Steam bending: Poor to Very Poor Results
Screwing: Good screwing properties, Very Good to Excellent Results; Turning: Good results
Painting: Fairly Difficult to Very Difficult
; Polishing: Satisfactory; Staining: Fairly Difficult to Very Difficult
; Varnishing: Fairly Difficult to Very Difficult
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- Numerical data Metric
- Numerical data English
- Strength properties
- References
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Item |
Green |
Dry |
Metric |
Specific Gravity |
0,7 |
|
|
Density |
|
881 |
kg/m3 |
Bending Strength |
1188 |
1571 |
kg/cm2 |
Crushing Strength |
608 |
874 |
kg/cm2 |
Hardness |
|
1004 |
kg |
Impact Strength |
|
|
cm |
Shearing Strength |
|
167 |
kg/cm2 |
Stiffness |
177 |
197 |
1000 kg/cm2 |
Tangential Shrinkage |
7 |
|
% |
Radial Shrinkage |
4 |
|
% |
Weight |
817 |
721 |
kg/m3 |
Maximum Load |
|
|
cm-kg/cm3 |
Toughness |
|
226 |
cm-kg |
Static Bending |
|
|
kg/cm2 |
|
| | | | Item | Green | Dry | English | Bending Strength | 16897 | 22352 | psi | Density | | 55 | lbs/ft3 | Hardness | | 2215 | lbs | Maximum Crushing Strength | 8650 | 12445 | psi | Shearing Strength | | 2388 | psi | Stiffness | 2529 | 2813 | 1000 psi | Toughness | | 197 | inch-lbs | Specific Gravity | 0.7 | | | Weight | 51 | 45 | lbs/ft3 | Radial Shrinkage | 4 | | % | Tangential Shrinkage | 7 | | % | Volumetric Shrinkage | 11 | | % | |
Hardness (side grain) = hard Shrinkage, Volumetric = moderate Shrinkage, Tangential = moderate Bending strength (MOR) = high Modulus of Elasticity (stiffness) = high Shrinkage, Radial = fairly large Shearing strength (parallel to grain) = medium Density (dry weight) = 53-60 lbs/cu. ft Bending strength (MOR) = very high Shrinkage, Radial = moderate Modulus of Elasticity (stiffness) = very high Max. crushing strength = very high Shrinkage, Volumetric = fairly large Shrinkage, Tangential = very small Shrinkage, Tangential = fairly large Shrinkage, Radial = very small Shrinkage, Radial = large Shearing strength (parallel to grain) = high Shrinkage, Tangential = small Shrinkage, Tangential = large Hardness (side grain) = medium Density (dry weight) = 67-75 lbs/cu.ft Density (dry weight) = 61-67 lbs/cu. ft Density (dry weight) = 46-52 lbs/cu. ft. Bending strength (MOR) = medium
Bena, P.,1960,Essences Forestieres de Guyane,Bureau Agricole et Forestier Guyanais GuyanaBerni, C.A., Bolza, E., Christensen, F.J.,1979,South American Timbers - The Characteristics, Properties and Uses of 190,Species,C.S.I.R.O Div. Building ResearchBoone, R.S., C.J. Kozlik, P.J. Bois, E.M. Wengert. 1988. Dry Kiln Schedules for Commercial Hardwoods - Temperate and Tropical. USDA, Forest Service, General Technical Report FPL-GTR-57, Forest Products Laboratory, Madison, Wisconsin.Brazil -, I.B.D.F.,1980,Woods from Tucurui - characteristics and application,The Ag. Ministry Brazilian Institute for Forest DevelopmentCaribbean Commission,1952,Information on properties of timbers gathered by questionnaire and,collated in the secretariat of the Caribbean Commission including some,related data from technical literature.,Caribbean Commission, Port of Spain, Trinidad Caribbean Timbers, their,Utilization and Trade within the area CTUTA/1/Doc.7 + App.1-18Chichignoud, M., G. Deon, P. Detienne, B. Parant and P. Vantomme.1990.Tropical Timber Atlas of Latin America.International Tropical Timber Organization (ITTO, Centre Technique Forestier Tropical, Division of CIRAD, 45 bis Avenue de la Belle Gabrielle, Nogent-sur-Marne, CEDEX, France.Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Edmondson, C.H.,1949,Reaction of Woods from S.America and Caribbean areas to Marine Borers in,Hawaiian Waters,Caribbean Foresters,10(1,PP37-41Erfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood B. Wood Species from S. American Tropical,Moist Forests,F.A.O. Forestry DepartmentFanshawe, D.B.,1954,Forest Products of British Guiana Part 1 Principal Timbers,Forest Department British Guiana Forestry Bulletin (New Series 2nd,Edition,No.1Guna et al, S.R.D.,1945,Notes on British Guiana Timbers,The 'Daily Chronicle' Ltd. Printers,28PPHarrar, E.S.,1941,Some Physical Properties of Modern Cabinet Woods 1. Hardness,Tropical Woods,9(68,PP1-11Harrar, E.S.,1942,Some Physical Properties of Modern Cabinet Woods 3. Directional and Volume,Shrinkage,Tropical Woods,9(71, pp26-32Kribs, D.A.,1950,Commercial and Foreign Woods on the American Market (a manual to their,structure, identification, uses and distribution,U.S.A. Penn. State College, Tropical Woods LaboratoryLongwood, F.R.,1962,Commercial Timbers of the Caribbean,U.S.A. Department of Agriculture, Agriculture Handbook,No.207Loureiro, A.A., Freitas da Silva, M.,1968,Catalogo das Madeiras da Amazonia (2 vols,Min. do Ultramar Belem BrasilPolak, A.M.,1992,Major Timber Trees of Guyana A Field Guide,The Tropenbos Foundation Wageningen, The NetherlandsRecord, S.J., Hess, R.W.,1943,Timbers of the New World,Yale University PressSallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TSallenave, P.,1964,Proprietes Physiques et Mecaniques des Bois Tropicaux (Premier Supplement,C.T.F.T. Publ.,no.23Slooten, H.J. van der,1970,Evaluation Study of eighteen Wood Species from Guyana for Veneer and,Plywood Manufacture,Forest Industries Development Survey FAO Report SF/GUY9 Tech. Report,No.13,U.N.D.P.Surinam Forest Service,1952,Surinam Timber - A Summary with brief descriptions of the main timber,species of Surinam,Surinam Forest ServiceTakahashi, A.,1975,Compilation of data on the Mechanical Properties of Foreign Woods (Part 2,Central and South America,Shimane University, Japan, Research Report on Foreign Wood No.4Teixeira, D. E., M. A. E. Santana and M. Rabelo de Souza.1988. Amazonian Timbers for the International Market.ITTO Technical Series 1.Brazilian Institute for Forestry Development, Brazil.Vink, A.T.,1965,Surinam Timbers,Surinam Forest Service Paramaribo,3rd rev. ed.Wangaard, F.F., et al,1954,Properties and Uses of Tropical Woods 4,Tropical Woods,14(99, pp1-187Wolcott, G.N.,1950,An Index to the Termite Resistance of Woods,Agricultural Experimental Station, University of Puerto Rico Bulletin,No.85Wood, B., Calnan, D.,1976,Toxic Woods,British Journal of Dermat 94 Suppl. 13
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