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LupunaLupuna
Lupuna (Ceiba samauma)

Family: Bombacaceae

Common names: Lupuna, Samauma

Distributed in: Brazil, Peru (Latin America)

Common uses: Cooperages, Furniture, Joinery, Moldings, Particleboard, Plywood corestock, Plywood

Tree size: Trunk diameter is 200-250 cm

Colors: the heart isPale red to pink, White to creamand the sapwoodSame as heartwood .The grain isStriped figure, the textureMedium to coarseand the lusterMedium

Natural durability: Susceptible to attack from termites (Isoptera), Very durable

Kiln Schedules: Drying (speed) is fast

Kiln Drying Rate: Slow

Drying Defects: Severe surface checking, Splitting

Blunting Effect: Blunting effect on machining is slight

Boring: Fairly easy to very easy

Mortising: Very Good to Excellent

Moulding: Fairly Easy to Very Easy

Movement in Service: Fairly Easy to Very Easy

Planing: Very Good to Excellent

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Easy to Work

Turning: Very Good to Excellent Results


  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 432 kg/m3
Bending Strength kg/cm2
Crushing Strength kg/cm2
Hardness 298 kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 3 %
Weight 416 368 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Density 27 lbs/ft3
Hardness 657 lbs
Weight 26 23 lbs/ft3
Radial Shrinkage 3 %
Tangential Shrinkage 6 %

Density (dry weight) = 31-37 lbs/cu. ft.
Density (dry weight) = 23-30 lbs/cu. ft.
Shrinkage, Tangential = small
Shrinkage, Radial = small
Hardness (side grain) = very soft
Hardness (side grain) = soft
Density (dry weight) = 15-22 lbs/cu. ft.

Brown, W.H.,1969,Properties and uses of Tropical hardwoods in the United Kingdom. Part 1,Nonstructural properties and uses.,Conference on Tropical hardwoods SC-5/TN-5, Syracuse UniversityKukachka, B.F.,1970,Properties of Imported Tropical Woods,Forest Research Paper FPL 125T.T.I.C.,1975,Ceiba samauma (Mart. & Zucc.) Schum.,Tropical Timber Information Center Brief No. 11U.S.D.A. Forest Service,1974,Wood Handbook,U.S.A. Department of Agriculture, Forest Service Handbook,72
*Come interpretare i dati (manleva su eventuali imprecisioni)