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Aroi-oi
Aroi-oi (Engelhardtia roxburghiana)

Family: Juglandaceae

Common names: Aroi-oi, Bibit, Bolas, Bor-patta-jam, Dinglaba, Hananlod, Kharhod, Ki hoedjan, Ki keper, Klimasawa, Limbunga, Lupisan, Magapisa, Mahua, Marasawa, Mesaw, Moglipoma, Mowa, Payong-yong, Pedped, Petsut, Pingol, Pyinsit, Rumgach, Salotsot, Salutsut, Savyak, Silapoma, Taguhusai, Tariokan, Taungtamasok, Thitsawbwa, Thitswebwe, Vakru

Distributed in: Burma, China, India, Indonesia, Malaysia, Nepal, Philippines, Thailand (Oceania and S.E. Asia)

Common uses: Boxes and crates, Cabinetmaking, Carvings, Food containers, Furniture, Heavy construction, Light construction, Matches

Tree size: Tree height is 40-50 m

Colors: the heart isPurple, Redand the sapwoodWhite to yellow, Yellow.The grain isWeak figure, the textureMedium to coarseand the lusterLustrous

Natural durability: Susceptible to insect attack, Very durable

Odor: Has an odor

Kiln Drying Rate: Naturally dries slowly

Drying Defects: No twisting or warping, Splitting

Ease of Drying: Slowly

Tree Identification: Bole/stem form is not buttressed

Blunting Effect: Moderate

Boring: Fairly easy to very easy

Carving: Fairly Easy to Very Easy

Cutting Resistance: Moderate to saw

Gluing: Fairly Easy to Very Easy

Mortising: Fairly Easy to Very Easy

Moulding: Fairly Easy to Very Easy

Movement in Service: Fairly Easy to Very Easy

Nailing: Pre-Boring Recommended, Very Good to Excellent

Planing: Very Good to Excellent

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Fairly Difficult to Difficult to Work

Routing recessing: Fairly Easy to Very Easy

Screwing: Pre-boring recommended, Very Good to Excellent Results; Turning: Very Good to Excellent Results

Painting: Fair to Good; Polishing: Very Good to Excellent; Staining: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 448 kg/m3
Bending Strength 474 744 kg/cm2
Crushing Strength 233 391 kg/cm2
Hardness 451 kg
Impact Strength 48 cm
Shearing Strength 118 kg/cm2
Stiffness 81 94 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 432 384 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 6751 10584 psi
Density 28 lbs/ft3
Hardness 995 lbs
Impact Strength 19 inches
Maximum Crushing Strength 3324 5570 psi
Shearing Strength 1690 psi
Stiffness 1153 1346 1000 psi
Weight 27 24 lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 9 %

Hardness (side grain) = soft
Shearing strength (parallel to grain) = low
Bending strength (MOR) = low
Modulus of Elasticity (stiffness) = very low
Toughness (total work) = very low
Shrinkage, Tangential = large
Shrinkage, Radial = large
Modulus of Elasticity (stiffness) = low
Max. crushing strength = medium
Toughness (total work) = low
Shrinkage, Tangential = fairly large
Shrinkage, Radial = moderate
Shearing strength (parallel to grain) = medium
Max. crushing strength = low
Density (dry weight) = 31-37 lbs/cu. ft.
Density (dry weight) = 23-30 lbs/cu. ft.
Bending strength (MOR) = medium

Burgess, P.F.,1966,Timbers of Sabah,Sabah Forest Record, no.6Desch, H.E.,1954,Manual of Malayan Timbers (2 vols,Malayan Forest Records,no.15Gamble, J.S.,1902,A Manual of Indian Timbers,Sampson Low, Marston & Co. LondonKraemer, J.H.,1951,Trees of the Western Pacific Region,West Lafayette, Indiana U.S.A.Reyes, L.J.,1938,Philippine Woods,Commonwealth of the Philippines Department of Agriculture and Commerce,Technical Bulletin,No.7Sono, P.,1974,Merchantable Timbers of Thailand.,Forest Products Research Division, Royal Forest Department, Bangkok,,Thailand.Varian, H.F., Gallardo, A.C.,1940,Notes on the susceptibility to insect attack of Philippine woods,Philippine Journal of forestry 3(3) pp347-78Whitmore, T.C. (Ed.,1972,Tree Flora of Malaya A Manual for Foresters Volume 1,Forest Department Ministry of Agriculture and Lands Malaysia
*Come interpretare i dati (manleva su eventuali imprecisioni)