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Blunting Effect Boring Carving Comments Common Names Common Uses Countries of Distribution Cutting Resistance Drying Defects Ease of Drying Family Name Gluing Grain Heartwood Color Kiln Schedules Luster Mortising Moulding Movement in Service Nailing Natural Durability Natural Growth Defects Numerical Data Planing Polishing References Regions of Distribution Resistance to Impregnation Response to Hand Tools Routing & Recessing Sapwood Color Scientific Name Screwing Staining Steam Bending Strength Properties Texture Trade Name Tree Identification Tree Size Turning		Scientific Name Dipterocarpus tuberculatus Trade Name Chhoeu khloung ou Family Name Dipterocarpaceae Common Names Chhoeu khloung ou, Choeu khlong, Dau, Dau son, Dawnding, Dom chhoeu khlong, Dzau long, Eng, Enig, Gurjan, Gurjun, In, Kahur, Kanklaw-taro, Keunong, Khlong, Khlong craham, Khuang, Klong, Koung, Kruang, Kuang, Kung, Mai teen, Mai tong, Mai tun, May cung, Pluang, Shinglim, Shweta gurjun, Sooahn, Tueng, Ung, Yang, Yang phluang Regions of Distribution Oceania and S.E. Asia Countries of Distribution  [VIEW MAP] Bangladesh, Burma, Cambodia, China, India, Laos, Thailand, Vietnam Common Uses Agricultural implements, Boat building (general), Cabinetmaking, Decks, Flooring: industrial heavy traffic, Furniture, Handles: general, Heavy construction, Joinery, Ladders, Light construction, Mine timbers, Piling, Plywood, Pulp/Paper products, Railroad ties, Shingles, Sporting Goods, Vehicle parts, Veneer Heartwood Color Brown Black Yellow Orange Green/grey Reddish brown Pale red to pink Dark brown Brown Sapwood Color Yellow Green/Grey Pink Different than heartwood Grain Even Straight Interlocked Straight Interlocked Texture Medium Even or uniform Uniform Medium coarse to coarse Luster High Medium Natural Growth Defects Latex or other ducts Natural Durability Durable Resistant to termites Non-resistant to marine borers Moderately durable Susceptible to attack from powder post (Lyctid & Bostrychid) beetles Susceptible to attack from termites (Isoptera) Pinworms (ambrosia beetles) are commonly present Non durable Kiln Schedules Dry at a slow speed UK=D US=T3D2/T3C1 Drying Defects Distortion Checking Moderate twist/warp Moderate surface checking Moderate end spitting Ease of Drying Thick Stock Requires Care Fairly Easy Little degrade Tree Identification Bole/stem form is straight Tree Size Tree height is 30-40 m Trunk diameter is 150-200 cm Comments General finishing qualities are rated as good General finishing qualities are rated as satisfactory Blunting Effect Moderate Blunting effect on machining is moderate Boring Fair to good results Fairly easy to very easy Carving Fair to Good Results Fairly Easy to Very Easy Cutting Resistance Easy to saw Cutting Resistance with dry wood is moderate Gluing Fair to Good Results Fairly Easy to Very Easy Moderate gluing properties Mortising Fair to Good Results Fairly Easy to Very Easy Moulding Fair to Good Results Fairly Easy to Very Easy Movement in Service Fair to Good Stability - Medium Movement Nailing Very Good to Excellent Results Fair to Good Results Fairly Easy to Very Easy Easy to nail Holds nails well Planing Fairly Easy to Very Easy Fair to Good Results Resistance to Impregnation Resistant sapwood Resistant heartwood Heartwood is moderately resistant Sapwood is moderately resistant Response to Hand Tools Moderate working qualities Difficult to machine Routing & Recessing Fair to Good Results Fairly Easy to Very Easy Screwing Very Good to Excellent Results Fair to Good Results Fairly Easy to Very Easy Screwing yields good results Easy to screw Turning Fair to Good Results Fairly Easy to Very Easy Steam Bending Fair to Good Results Moderate Polishing Fair to Good Results Fairly Easy to Very Easy Good results Staining Fair to Good Results Fairly Easy to Very Easy Finish is generally satisfactory Strength Properties Density (dry weight) = 53-60 lbs/cu. ft Shrinkage, Tangential = large Max. crushing strength = high Shrinkage, Tangential = fairly large Shrinkage, Radial = large Shrinkage, Radial = fairly large Shearing strength (parallel to grain) = medium Modulus of Elasticity (stiffness) = medium Density (dry weight) = 46-52 lbs/cu. ft. Bending strength (MOR) = medium Shrinkage, Tangential = moderate Shrinkage, Radial = moderate Density (dry weight) = 38-45 lbs/cu. ft. Bending strength (MOR) = high Numerical Data Item Green Dry English Bending Strength 10732 16695 psi Density 50 lbs/ft3 Maximum Crushing Strength 6899 9945 psi Shearing Strength 2205 psi Stiffness 1665 1923 1000 psi Weight 49 40 lbs/ft3 Radial Shrinkage 5 % Tangential Shrinkage 9 % Item Green Dry Metric Bending Strength 754 1173 kg/cm2 Density 801 kg/m3 Maximum Crushing Strength 485 699 kg/cm2 Shearing Strength 155 kg/cm2 Stiffness 117 135 1000 kg/cm2 Weight 785 641 kg/m3 Radial Shrinkage 5 % References Forests Products Research Laboratory, U.K.,1956,A Handbook of Hardwoods,Forest Products Research Laboratory, Princes Risborough, Department of,Science and Industrial Research, Building Research Establishment Fundter, J.M.,1982,Names for Dipterocarp timbers and trees from Asia,Pudoc, Wageningen, Netherlands Keating, 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,1 Patterson, D.,1988,Commercial Timbers of the World, 5th Edition,Gower Technical Press Sallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.T Tewari, M.C., Jain, J.C.,1980,Utilization of Secondary Species,Journal of the National Building Organization 25(2) pp1-6