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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 Comments Common Names Common Uses Countries of Distribution Cutting Resistance Drying Defects Ease of Drying Family Name Gluing Grain Heartwood Color Kiln Schedules Light-Induced Color Change Luster Mortising Moulding Movement in Service Nailing Natural Durability Numerical Data Odor Planing Polishing References Regions of Distribution Resistance to Impregnation Response to Hand Tools Routing & Recessing Sanding Sapwood Color Scientific Name Screwing Staining Strength Properties Texture Trade Name Tree Identification Tree Size Turning Veneering Qualities Scientific Name Shorea polysperma Trade Name Abahungon Family Name Dipterocarpaceae Common Names Abahungon, Adamoi, Adamon, Adandron, Adanroi, Adumoi, Alangao, Ayohan, Ayuhan, Ayuthan, Bagitan, Bagobahong, Bagong-bahong, Balabaccan mahogany, Balagaian, Balakbak, Balakbakan, Balsian, Bataan mahogany, Beko, Bunga, Chapui, Diga hungan, Digahungan, Ganda, Gangauan, Hapnit, Hillagasi, Illagasi, Kaliaan, Kalikasan, Kuela, Lauan, Lauan colorado, Lauan gangauan, Lauan-chapui, Lauan-gangauan, Letis, Lotis, Mag-orang, Magorang, Majau, Malagamat, Malagangao, Malagangao na itim, Malagiso, Malagniat, Malai-a, Malakayang, Malang, Malatangan, Manapayung, Manapog, Manasol, Manggachapoi, Manggachapui, Manili, Manpayug, Manpog, Mansal, Maratinta, Matanged, Mayaas, Mayapis, Merampu, Meranti pipijat, Merantimajau, Naitim, Palai, Palali, Panunsungan, Panunsungin, Red lauan, Selangan pelandok, Tagaui, Takoban-tabigion, Takuban, Takuban nga gangauan, Takugan nga ganguan, Tamo, Tamok, Tangile, Tanguile, Tiaong, Tugaui, Tulo, Tulu, Tumutugaui, Tutmutugaui Regions of Distribution Oceania and S.E. Asia Countries of Distribution  [VIEW MAP] Brunei, Philippines Common Uses Boat building (general), Boat building: planking, Cabinetmaking, Furniture, Joinery, Paneling, Plywood, Veneer Heartwood Color Brown Black Reddish brown Pale red to pink Red Brown, red, dark reddish brown with nearly black stripes after prolonged exposure Sapwood Color Brown Grey White to yellow Well defined Paler than heartwood Grain Rippled (figure) Interlocked Figure Rippled figure Interlocked Texture Medium Even or uniform Uniform Resinous and oily Medium to coarse Fine Fine to medium Medium Coarse Luster Low Slightly lustrous Lustrous Natural Durability Perishable Non-resistant to termites Non durable Moderately durable Odor Has an odor Light-Induced Color Change Darker Kiln Schedules Drying (speed) is fast Drying Defects Discoloration Distortion Slight surface checking Moderate twist/warp Ease of Drying Reconditioning Treatement Fairly Easy Little degrade Easy Tree Identification Bole/stem form is straight Bole/stem form is buttressed Bole/stem form is cylindrical Tree Size Trunk diameter is 100-150 cm Comments General finishing qualities are rated as good Blunting Effect High to severe Blunting effect on machining is slight Cutting Resistance Fairly Difficult to Very Difficult to saw Gluing Easy to glue Mortising Fair to Good Results Fairly Difficult to Very Difficult Moulding Fair to Good Results Fairly Difficult to Very Difficult Movement in Service Fair to Good Stability - Medium Movement Small Nailing Pre-Boring Recommended Poor to Very Poor Results Holds satisfactorily Planing Fair to Good Results Fairly Difficult to Very Difficult Resistance to Impregnation Resistant heartwood Resistant sapwood Permeable sapwood Response to Hand Tools Fairly Difficult to Difficult to Work Easy to machine Routing & Recessing Fair to Good Results Fairly Difficult to Very Difficult Sanding Fairly Easy to Very Easy Fair to Good Results Screwing Pre-boring recommended Turning Fair to Good Results Fairly Difficult to Very Difficult Veneering Qualities Suitable for peeling There is slight to moderate drying degrade and the potential for buckles and splits Moderately easy to veneer Polishing Surface Preparation Fair to Good Results Staining Finish is generally good Strength Properties Density (dry weight) = 38-45 lbs/cu. ft. Density (dry weight) = 31-37 lbs/cu. ft. Modulus of Elasticity (stiffness) = medium Max. crushing strength = medium Hardness (side grain) = soft Bending strength (MOR) = medium Shrinkage, Radial = moderate Shearing strength (parallel to grain) = very low Shearing strength (parallel to grain) = low Density (dry weight) = 46-52 lbs/cu. ft. Density (dry weight) = 23-30 lbs/cu. ft. Toughness-Hammer drop (Impact Strength) = very low Toughness-Hammer drop (Impact Strength) = low Shrinkage, Tangential = moderate Shrinkage, Tangential = fairly large Modulus of Elasticity (stiffness) = high Bending strength (MOR) = low Numerical Data Item Green Dry English Bending Strength 8670 13570 psi Density 36 lbs/ft3 Hardness 995 lbs Impact Strength 22 inches Maximum Crushing Strength 3916 6397 psi Shearing Strength 1221 psi Stiffness 1748 2018 1000 psi Weight 35 27 lbs/ft3 Radial Shrinkage 4 % Tangential Shrinkage 8 % Item Green Dry Metric Bending Strength 609 954 kg/cm2 Density 576 kg/m3 Hardness 451 kg Impact Strength 55 cm Maximum Crushing Strength 275 449 kg/cm2 Shearing Strength 85 kg/cm2 Stiffness 122 141 1000 kg/cm2 Weight 560 432 kg/m3 Radial Shrinkage 4 % References Ashton, P.S.,1964,A manual of the Dipterocarp trees of Brunei State,O.U.P. London Brown, W.H.,1969,Properties and uses of Tropical hardwoods in the United Kingdom. Part 1,Nonstructural properties and uses.,Conference on Tropical hardwoods SC-5/TN-5, Syracuse University Cortes, R.T.,1940,Impact bending properties of twelve Philippine Dipterocarps,Philippine Journal of Forestry 3(3) pp325-43 Dale, I.R., Greenway, P.J.,1961,Kenya Trees and Shrubs,Buchanans Kenya Estates Ltd. Nairobi Hatchards London Fundter, J.M.,1982,Names for Dipterocarp timbers and trees from Asia,Pudoc, Wageningen, Netherlands Harrar, E.S.,1942,Some Physical Properties of Modern Cabinet Woods 3. Directional and Volume,Shrinkage,Tropical Woods,9(71, pp26-32 I.U.F.R.O.,1973,Veneer Species of the World,Assembled at F.P.L. Madison on behalf of I.U.F.R.O. Working Party on,Slicing and Veneer Cutting Kynoch, W., Norton, N.A.,1938,Mechanical Properties of certain tropical woods chiefly from S. America,School of Forestry and Conservation, University of Michigan Bulletin,No.7 Lomibao, B.A.,1973,Guide to the identification of the woods of Philippine Dipterocarpaceae,Foxpride Digest 2(2) pp26-34 Reyes, L.J.,1938,Philippine Woods,Commonwealth of the Philippines Department of Agriculture and Commerce,Technical Bulletin,No.7 Tamesis, F., Aguilar, L.,1953,The 'Philippine mahogany' and other Dipterocarp woods,Philippine Department of Agriculture and Natural Research Popular Bulletin,No.44 U.S.D.A. Forest Service,1974,Wood Handbook,U.S.A. Department of Agriculture, Forest Service Handbook,72