Search for

Clicking any heading in the main data area (at right) will scroll the page back to this top position. Use the following links to jump to the associated section in the main data. Boring Carving Common Names Common Uses Countries of Distribution Cutting Resistance Drying Defects Ease of Drying Family Name Grain Heartwood Color Kiln Drying Rate Mortising Moulding Natural Durability Numerical Data Planing Polishing References Regions of Distribution Response to Hand Tools Sanding Sapwood Color Scientific Name Strength Properties Synonyms Texture Trade Name Tree Identification Tree Size Turning Scientific Name Hopea ferrea Trade Name Ateang Family Name Dipterocarpaceae Synonyms Balanocarpus anomalus, Hopea anomala Common Names Ateang, Atteang, Chegal batu, Chengal batu, Chengal laki, Ching chaap, Kian saai, Koki thmar, Lao tao, Mach, Malaut, Malut, Mulut, Roteang, Sang, Sang da, Sang dao, Takhian hin, Takhian nu, Takhian-hin Regions of Distribution Oceania and S.E. Asia Countries of Distribution  [VIEW MAP] Cambodia, Laos, Malaysia, Thailand, Vietnam Common Uses Heavy construction Heartwood Color Brown Red Purple Yellow to golden-yellow to orange Reddish brown Pale brown Sapwood Color Brown Red Paler than heartwood Grain Straight Interlocked Figure Birds-eye (figure) Even Distinct (figure) Texture Medium Coarse Fine Interlocked Figure Stripe (figure) High Natural Durability Very durable Non-resistant to marine borers Durable Resistant to termites Perishable Susceptible to insect attack Moderately durable Non-resistant to powder post beetles Non-durable Resistant to powder post beetles Very durable Drying Defects Distortion Checking Splitting Ease of Drying Moderately Difficult to Difficult Fairly Easy Reconditioning Treatement Rapidly Little degrade Kiln Drying Rate Naturally dries quickly Tree Identification Bole/stem form is misshapen Bole/stem form is buttressed Tree Size Trunk diameter is 100-150 cm Tree height is 30-40 m Tree height is 20-30 m Bole length is 10-20 m Bole length is 20-30 m Sapwood width is 5-10 cm Sapwood width is 0-5 cm Tree height is 10-20 m Tree height is 40-50 m Bole length is 0-10 m Boring Fairly easy to very easy Fairly difficult to very difficult Carving Fairly Difficult to Very Difficult Poor to Very Poor Results Cutting Resistance Easy to saw Mortising Fairly Difficult to Very Difficult Moulding Fairly Difficult to Very Difficult Planing Fairly Easy to Very Easy Fairly Difficult to Very Difficult Response to Hand Tools Easy to Work Fairly Difficult to Difficult to Work Sanding Fairly Difficult to Very Difficult Turning Fairly Difficult to Very Difficult Polishing Fair to Good Results Strength Properties Density (dry weight) = 67-75 lbs/cu. ft. Density (dry weight) = 61-67 lbs/cu. ft. Density (dry weight) = 53-60 lbs/cu. ft. Shearing strength (parallel to grain) = medium Shearing strength (parallel to grain) = high Modulus of Elasticity (stiffness) = very high Modulus of Elasticity (stiffness) = high Hardness (side grain) = very hard Hardness (side grain) = hard Bending strength (MOR) = very high Bending strength (MOR) = high Numerical Data Item Green Dry English Bending Strength 17241 25113 psi Density 52 lbs/ft3 Hardness 2628 lbs Shearing Strength 2525 psi Stiffness 2373 2752 1000 psi Weight 51 49 lbs/ft3 Item Green Dry Metric Bending Strength 1212 1765 kg/cm2 Density 833 kg/m3 Hardness 1192 kg Shearing Strength 177 kg/cm2 Stiffness 166 193 1000 kg/cm2 References Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison. Fundter, J.M.,1982,Names for Dipterocarp timbers and trees from Asia,Pudoc, Wageningen, Netherlands I. Soerianegara and R.H.M.J. Lemmens (Editors,1993,Plant Resources of South-East Asia 5,(PROSEA, 1,Timber trees: Major commercial timbers,Pudoc Scientific Publishers, Wageningen 1993 Sono, P.,1974,Merchantable Timbers of Thailand.,Forest Products Research Division, Royal Forest Department, Bangkok,,Thailand.