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Ditta 5
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Ditta 4
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Ditta 1
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Uas
Uas (Harpullia arborea)

Family:

Common names: Uas

Distributed in: Philippines (Oceania and S.E. Asia)

Distribution overview: Indigenous to the Philippines (Ipil ; Sitio Ledong , Brgy.￿ Ambulong , Ambulong Island , San Jose ,Occidental Mindoro), commonly found in thickets and secondary forests.

Common uses: Carvings, Specialty items

Environment profile: Status has not been officially assessed

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isRed, Whiteand the sapwoodWhite, Yellow.The grain isGenerally slightly wavy , the textureMedium

Natural durability: Resistant to powder post beetles, Susceptible to insect attack

Ease of Drying: Fairly Easy

Comments: An exception is Tulipwood or Tulip lancewood (H. pendula ), which occurs in Australia, and which produce trees that are often knotty and irregularly shaped. The tree also produces timber that is very hard, heavy, and tough which make it highly suitable for such purposes as walking sticks, rulers, pen-handles, batons, billiard-cue butts, whip handles, paper knives and napkin rings.Very little commercial value but note exceptions

Resistance to Impregnation: Permeable sapwood

Response to hand tools: Easy to Work



  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density kg/m3
Bending Strength 661 980 kg/cm2
Crushing Strength 61 99 kg/cm2
Hardness 586 kg
Impact Strength cm
Shearing Strength 134 kg/cm2
Stiffness 89 105 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage %
Weight kg/m3
Maximum Load cm-kg/cm3
Toughness 261 cm-kg
Static Bending 359 570 kg/cm2
Item Green Dry English
Bending Strength 9408 13939 psi
Crushing Strength 879 1422 psi
Hardness 1294 lbs
Maximum Crushing Strength 3805 6565 psi
Shearing Strength 1909 psi
Static Bending 5116 8112 psi
Stiffness 1277 1505 1000 psi
Toughness 227 inch-lbs
Specific Gravity 0.56 0.57


Desch, H. E. 1954. Manual of Malayan Timbers - Volume II. Malayan Forest Records, No. 15. Malaya Publishing House Ltd., Singapore.Lauricio, F. M., Bellosillo, S. B., The Mechanical and Related Properties of Philippine Woods, The Philippine Lumber Journal, 12(5): A-H.
*Come interpretare i dati (manleva su eventuali imprecisioni)