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Mandioqueira
Mandioqueira (Qualea paraensis)

Family: Vochysiaceae

Common names: Berg Gronfoeloe, Florecillo, Gonfolo, Gonfolo Rose, Grignon fou, Gronfoeloe, Kouali, Lacreiro, Mandio, Mandioqueira, Mandioqueira aspera, Mandioqueira escamosa, Mandioqueira lisa, Quaruba

Distributed in: Brazil, French Guiana, Guyana, Peru, Suriname, Venezuela (Central America, Latin America)

Distribution overview: Qualea genus contains about 45 species which are widely distributed in the Amazon region and the Guianas. Q. paraensis occurs primarily in the Amazon region.

Common uses: Beams, Boxes and crates, Building construction, Building materials, Cabin construction, Casks, Chairs, Chests, Concealed parts (Furniture), Concrete formwork, Construction, Decks, Decorative plywood, Desks, Dining-room furniture, Dowell pins, Dowells, Drawer sides, Exterior trim & siding, Exterior uses, Factory construction, Fine furniture, Floor lamps, Form work, Foundation posts, Framing, Furniture , Furniture components, Furniture squares or stock, General carpentry, Glued laminated-beams, Hatracks, Heavy construction, Interior construction, Interior trim, Joists, Kitchen cabinets, Light construction, Living-room suites, Moldings, Plywood, Vehicle parts

Product sources: The ITTO reports that the species is an important source of timber. The timber is exported in limited quantities. The timber is imported from Brazil into Japan.

Environment profile: Status has not been officially assessed

Tree size: Tree height is 20-30 m

Colors: the heart isPurple, Redand the sapwoodWhite, Yellowish.The grain isStraight to interlocked, the textureMedium to coarseand the lusterMedium to golden

Natural durability: Fair weathering properties , Perishable

Odor: No specific smell or taste

Silica Content: Contains high levels of silica (> 0.5% of dry weight) Levels of 0.10% (of ovendry weight) have been reported. Silica content of 0.05% is generally believed to be high enough to affect the machining properties of wood

Kiln Schedules: US=T3-D2/T3-D1

Drying Defects: Ring Shakes, Warping can be expected

Ease of Drying: Moderately difficult to treat with preservatives

Comments: Timber produced by species in the genus is repoerted to vary widely in appearance and properties, with some bearing some resemblance to Spanish cedar (Cedrela ). Q. paraensis is similar to the African species Iroko (Chlorophora tinctoria ) in mechanical and physical properties

Blunting Effect: Moderate High silica content in some Qualea species may cause cutting edges and saws to blunt rather rapidly

Boring: Very good to excellent results

Cutting Resistance: Dulls saws severly

Gluing: Satisfactory gluing properties

Mortising: Very Good to Excellent

Moulding: Fair to Good

Movement in Service: Fair to Good

Nailing: Fairly Difficult to Very Difficult, Pre-Boring Recommended

Planing: Very Good to Excellent

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Responds Readily

Sanding: Very Good to Excellent Results

Steam bending: Very Good to Excellent Results

Screwing: Fairly Easy to Very Easy, Very Good to Excellent Results; Turning: Very Good to Excellent Results

Staining: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,58
Density 705 kg/m3
Bending Strength 765 1209 kg/cm2
Crushing Strength 394 667 kg/cm2
Hardness 599 kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 133 154 1000 kg/cm2
Tangential Shrinkage 9 %
Radial Shrinkage 5 %
Weight 1153 689 kg/m3
Maximum Load cm-kg/cm3
Toughness 176 cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 10883 17207 psi
Density 44 lbs/ft3
Hardness 1321 lbs
Maximum Crushing Strength 5611 9491 psi
Stiffness 1901 2203 1000 psi
Toughness 153 inch-lbs
Specific Gravity 0.58
Weight 72 43 lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 9 %
Volumetric Shrinkage 12 %

Weight = high
Resists denting and marring
Moderately hard
Max. crushing strength = very high
High in density
Compression strength (parallel to grain) = very high
Bending strength (MOR) = high
Compression strength and crushing strength higher than in Teak or Hard maple Strength qualities far superior to those of Mahogany.

Boone, 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.Chichignoud, 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.Record, S.J. and R.W. Hess. 1943. Timbers of the New World. Published on the Charles Lathrop Pack Foundation, Yale University Press, New Haven CT.Teixeira, 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.
*Come interpretare i dati (manleva su eventuali imprecisioni)