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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. Blunting Effect Common Names Common Uses Countries of Distribution Drying Defects Ease of Drying Family Name Gluing Grain Heartwood Color Kiln Drying Rate Luster Mortising Moulding Movement in Service Nailing Natural Durability Numerical Data Polishing References Regions of Distribution Resistance to Impregnation Response to Hand Tools Sanding Sapwood Color Scientific Name Screwing Silica Content Staining Strength Properties Texture Trade Name Tree Size Turning Varnishing Veneering Qualities Scientific Name Dipterocarpus rotundifolius Trade Name Keriung Family Name Dipterocarpaceae Common Names Keriung, Keruing mengkai Regions of Distribution Oceania and S.E. Asia Countries of Distribution  [VIEW MAP] Malaysia Common Uses Flooring, Heavy construction, Light construction, Poles, Railroad ties, Vehicle parts Heartwood Color Brown Green/grey Red Yellow Purple Orange Reddish brown Dark brown Pale brown Sapwood Color White Yellow Pink Red Brown Different than heartwood White to yellow Well defined Grain Even Figure Straight Interlocked Distinct (figure) Weak (figure) Straight Weak figure Interlocked Distinct figure Texture Medium Coarse Fine Coarse Luster Medium Natural Durability Susceptible to insect attack Moderately durable Durable Non-resistant to powder post beetles Perishable Non-durable Non-resistant to termites Non-resistant to marine borers Resistant to powder post beetles Susceptible to attack from termites (Isoptera) Resistant to attack from powder post (Lyctid & Bostrychid) beetles Pinworms (ambrosia beetles) often present in the standing tree Pinworms (ambrosia beetles) may be present in the felled log Non durable Moderately durable Silica Content Siliceous Drying Defects Distortion Checking Severe surface checking Severe end splitting Moderate twist/warp Moderate surface checking Moderate end spitting Ease of Drying Fairly Easy Difficult Kiln Drying Rate Rapid Drying rate is fairly rapid to fast Tree Size Sapwood width is 10-15 cm Trunk diameter is 100-150 cm Bole length is 20-30 m Bole length is 10-20 m Tree height is 40-50 m Tree height is 30-40 m Sapwood width is 5-10 cm Bark width is 5-10 mm Sapwood width is 0-5 cm Blunting Effect Moderate Blunting effect on machining is moderate Gluing Fairly Difficult to Very Difficult Fair to Good Results Fairly Easy to Very Easy Mortising Fairly Easy to Very Easy Moulding Fairly Easy to Very Easy Movement in Service Excellent Stability - Small Movement Nailing Very Good to Excellent Results Fair to Good Results Resistance to Impregnation Resistant heartwood Resistant sapwood Heartwood is permeable Response to Hand Tools Easy to Work Sanding Very Good to Excellent Results Fair to Good Results Good sanding finish Screwing Very Good to Excellent Results Fair to Good Results Turning Very Good to Excellent Results Fair to Good Results Veneering Qualities Veneers easily Veneers moderately easy Suitable for peeling Suitable for slicing Polishing Fair to Good Results Very Good to Excellent Results Staining Fair to Good Results Varnishing Very Good to Excellent Results Fair to Good Results Fairly Easy to Very Easy Strength Properties Shrinkage, Tangential = large Shrinkage, Tangential = fairly large Shrinkage, Radial = moderate Shrinkage, Radial = fairly large Density (dry weight) = 61-67 lbs/cu. ft Density (dry weight) = 53-60 lbs/cu. ft Numerical Data Item Green Dry English Density 58 lbs/ft3 Weight 57 46 lbs/ft3 Radial Shrinkage 4 % Tangential Shrinkage 9 % Item Green Dry Metric Density 929 kg/m3 Weight 913 737 kg/m3 Radial Shrinkage 4 % References Chudnoff, 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.15 Fundter, J.M.,1982,Names for Dipterocarp timbers and trees from Asia,Pudoc, Wageningen, Netherlands Thomas, A.V.,1948,Keruing Timber (Dipterocarpus spp.,Malayan Forester 11(4) pp153-6