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 Cutting Resistance Distribution Overview Drying Defects Ease of Drying Environmental Profile Family Name Grain Heartwood Color Nailing Natural Durability Numerical Data Odor Planing Polishing Product Sources References Regions of Distribution Resin Content Resistance to Impregnation Sapwood Color Scientific Name Screwing Silica Content Strength Properties Substitutes Texture Trade Name Tree Size		Scientific Name Cotylelobium spp. Trade Name Resak Family Name Dipterocarpaceae Common Names Chan thip, Lau tau, Mascal wood, Narig, Resak, Taungsagaing Regions of Distribution Oceania and S.E. Asia Countries of Distribution  [VIEW MAP] Cambodia, India, Malaysia, Myanmar, Papua New Guinea, Philippines, Sri Lanka Common Uses Barge fenders, Bedroom suites, Boat building, Building construction, Building materials, Cabin construction, Cabinetmaking, Canoes, Construction, Crossties, Docks, Dockwork, Domestic flooring, Drawer sides, Excelsior, Factory construction, Flooring, Furniture , Harbor work, Heavy construction, Joinery, Kitchen cabinets, Lifeboats, Living-room suites, Marine construction, Mine timbers, Naval architecture, Office furniture, Parquet flooring, Radio - stereo - TV cabinets, Raft floats, Rafts, Railroad ties, Shipbuilding, Sills, Sub-flooring, Wharf construction, Windows Environmental Profile Secure within many parts of its natural range, but not completely assessed Extinct, Endangered, Vulnerable, or Rare within parts of its range Data source is World Conservation Monitoring Center C. lanceolatum is currently Vulnerable within its natural habitat in Thailand and Peninsula Malaysia, while its status is either Extinct, Endangered, Vulnerable, or Rare in Sabah in Malaysia. It is secure within its habitat in Borneo and Brunei Distribution Overview Widespread in Southeast Asia from India and Ceylon to New Guinea. Thailand, Laos, Vietnam, Cambodia and Indomalesia. Generally occurs sporadically throughout the well-drained lowland dipterocarp forests near rivers and hills. Heartwood Color Yellowish brown Darkens with age Sapwood Color Well defined Paler than heartwood Grain Even Figure Interlocked Mottled (figure) Silver tint (figure) Silver tinted figure Shallowly interlocked Mottled figure Texture Fine Fine and uniform Natural Durability Heartwood is vulnerable to pin-hole borer attack Heartwood is very resistant to decay and termite attack Odor No specific smell or taste Silica Content Likely to have significant impact on machining Contains significant silica (up to .25% of dry weight) Resin Content May contain resin Drying Defects Slight twist/warp Slight surface checking Slight end splitting Ease of Drying Fairly Easy Easy Drying properties vary with species. Species from the Philippines are reported to dry easily with minimum defects Tree Size Tree height is 10-20 m Product Sources The trade name Resak is assigned to timbers produced by species in both Cotylelobium and Vatica genera. The timbers are highly similar in structure. Substitutes Goncalo alves (Astronium fraxinifolium A. graveolens) is an excellent substitute for producing bobbins. Blunting Effect Severe Cutting Resistance Difficult to saw Nailing Difficult to nail Planing Difficult to plane Resistance to Impregnation Sapwood is resistant Heartwood is highly resistant Screwing Difficult to screw Polishing Takes high polish Strength Properties Resists denting and marring Hardness (side grain) = medium Compression strength (parallel to grain) = high Bending strength (MOR) = very high Numerical Data Item Green Dry English Bending Strength 10682 19208 psi Hardness 1519 lbs Maximum Crushing Strength 5449 8820 psi Stiffness 1862 2489 1000 psi Radial Shrinkage 4 % Tangential Shrinkage 9 % Item Green Dry Metric Bending Strength 751 1350 kg/cm2 Hardness 689 kg Maximum Crushing Strength 383 620 kg/cm2 Stiffness 130 174 1000 kg/cm2 Radial Shrinkage 4 % References Chowdhury, K.A. and S.S. Ghosh. 1958. Indian Woods - Their Identification, Properties and Uses, Volume I - Dilleniaceae to Elaeocarpaceae. Published by the Manager of Publications, Delhi, India. Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison. Desch, H. E. 1957. Manual of Malayan Timbers - Volume I. Malayan Forest Records, No. 15. Malaya Publishing House Ltd., Singapore. 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 WCMC. 1992. Conservation Status Listing - Trees and Timbers of the World. World Conservation Monitoring Center-Plants Programme, Cambridge, CB3 ODL, United Kingdom.