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Arupa
Arupa (Ganua motleyana)

Family: Sapotaceae

Common names: Arupa, Balam, Balem, Bangku, Baringin, Bengku, Gata-gata, Getah merah, Getah perca, Gofiri, Hangkang, Jengkot, Katiau, Kawang, Ketiau, Kibangkong, Kisawo, Kuma, Kume, Maneo keaaf, Mayang, Mergetahan, Nantu, Nato, Njatuh, Nyato, Nyatoh, Nyatoh ketiau, Nyatu, Padang, Punti, Sau payo, Semaram, Siki, Sodu-sodu, Soko, Suntai, Tanjungan, Tofiri

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

Common uses: Cabinetmaking, Furniture, Joinery, Light construction, Plywood, Shingles, Veneer: decorative

Tree size: Tree height is 30-40 m

Colors: the heart isReddish brown, Yellow to golden-yellow to orangeand the sapwoodBrown, Paler than heartwood.The grain isWavy, the textureMedium to coarseand the lusterSlightly lustrous

Natural durability: Resistant to wood staining fungal attack, Susceptible to insect attack

Kiln Schedules: Kiln Drying Rate (in days) is rapid

Kiln Drying Rate: Rapid (<10 days for boards < 32 mm, to <30 days for boards >= 63 mm)

Drying Defects: Moderate surface checking, Moderate twist/warp

Ease of Drying: Difficult

Tree Identification: Bole/stem form is straight

Blunting Effect: Blunting effect on machining is fairly severe

Cutting Resistance: Cutting Resistance with green wood is easy

Gluing: Easy to glue

Nailing: Fairly Easy to Very Easy

Planing: Planes well, to a good finish

Resistance to Splitting: Poor

Response to hand tools: Easy to machine

Veneering qualities: Good gluing qualities, No steaming needed during bolt preparation.


Polishing: Satisfactory; Staining: Finish is generally good ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 753 kg/m3
Bending Strength kg/cm2
Crushing Strength kg/cm2
Hardness kg
Impact Strength cm
Shearing Strength kg/cm2
Stiffness 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 3 %
Weight 737 592 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Density 47 lbs/ft3
Weight 46 37 lbs/ft3
Radial Shrinkage 3 %
Tangential Shrinkage 4 %

Shrinkage, Tangential = very small
Shrinkage, Radial = small
Density (dry weight) = 46-52 lbs/cu. ft.

Brown, W.H.,1978,Timbers of the World, No. 4 South East Asia,TRADA, Red Booklet SeriesDesch, H.E.,1954,Manual of Malayan Timbers (2 vols,Malayan Forest Records,no.15Lee, Y.H., Lopez, D.T.,1968,The Machining Properties of some Malayan Timbers,Malayan Forester,3,pp194-210Martawijaya, A., Kadir, K., Kartasujana, I.,1986,Indonesian Wood Atlas. Vol.1.,Department of Forestry Agency for Forestry Research and Development.,Bogar-IndonesiaMenon, P.K.B.,1959,The wood anatomy of Malayan timbers: commercial timbers, 3. Light,hardwoods,Malaysian Forest Research Institute Kepong, Research Pamplet, No. 27.Whitmore, 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)