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Hekakora
Hekakora (Gluta elegans)

Family: Anacardiaceae

Common names: Hekakora, Rengas

Distributed in: Burma, Indonesia, Malaysia, Papua New Guinea, Solomon Islands, Thailand (Oceania and S.E. Asia)

Common uses: Boat building (general), Boxes and crates, Cabinetmaking, Carvings, Chemical derivatives, Furniture, Heavy construction, Joinery, Light construction, Moldings, Plywood, Toys, Turnery, Vehicle parts, Veneer: decorative

Environment profile: Vulnerable

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodWhite to yellow, Yellow.The grain isStraight, the textureMediumand the lusterMedium

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

Odor: Has an odor

Kiln Drying Rate: Slow

Drying Defects: Moderate twist/warp, Splitting

Ease of Drying: Reconditioning Treatement

Tree Identification: Bole/stem form is fluted

Comments: General finishing qualities are rated as good

Blunting Effect: Moderate

Boring: Fairly easy to very easy

Carving: Fairly Easy to Very Easy

Cutting Resistance: Easy to saw

Gluing: Fairly Easy to Very Easy

Mortising: Fairly Easy to Very Easy

Moulding: Very Good to Excellent

Movement in Service: Very Good to Excellent

Nailing: Pre-Boring Recommended, Very Good to Excellent

Planing: Very Good to Excellent

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Responds Readily

Routing recessing: Fairly Easy to Very Easy

Sanding: Fairly Easy to Very Easy

Veneering qualities: Veneers easily, Veneers moderately easy

Steam bending: Unsuitable

Screwing: Fairly Difficult to Very Difficult, Poor to Very Poor Results; Turning: Poor to Very Poor Results

Polishing: Very Good to Excellent; Staining: Very Good to Excellent; Varnishing: Surface Preparation;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 737 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 2 %
Weight 721 576 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Density 46 lbs/ft3
Weight 45 36 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 4 %

Shrinkage, Tangential = very small
Shrinkage, Radial = very small
Density (dry weight) = 38-45 lbs/cu. ft.
Shrinkage, Tangential = small
Density (dry weight) = 61-67 lbs/cu. ft
Density (dry weight) = 53-60 lbs/cu. ft
Density (dry weight) = 46-52 lbs/cu. ft.
Density (dry weight) = 31-37 lbs/cu. ft.

Bolza, E.,1975,Properties and Uses of 175 Timber Species from Papua New Guinea and West,Irian,C.S.I.R.O. Div. Building Research Report,no.34Brown, W.H.,1978,Timbers of the World, No. 4 South East Asia,TRADA, Red Booklet SeriesChudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Desch, 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. LondonKeating, W.G., Bolza, E.,1982,Characteristics properties and uses of timbers. South East Asia, Northern,Australia and the Pacific,C.S.I.R.O. Div. Chemical Technology,Inkata Press,1Ng, F.S.P. (Ed,1989,Tree Flora of Malaya A Manual for Foresters Volume 4,Forest Research Institute Malaysia Ministry of Primary Industries
*Come interpretare i dati (manleva su eventuali imprecisioni)