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White seraya
White seraya (Parashorea malaanonan)

Family: Dipterocarpaceae

Common names: Anyit, Apnit, Bagtikan, Baiukan, Baiukan-pula, Bakoog, Balak-bakan, Baliuisuis, Banaliuan, Bayokan, Bayukan-pula, Bayukan-puti, Binaliuan, Buayahon, Cho-chi, Dalurot, Dangiog, Danglog, Danlig, Danlig-puti, Danlog, Daun lichin, Dunlog, Gagil, Gerutu gerutu, Guijo blanco, Hapnit, Lapnisan, Lasaan, Lauaan, Lauan, Lauan item, Lauan-barik, Lauan-danlog, Lauan-pula, Lauan-puti, Light red lauan, Litok, Malaanonang, Malaanonang na pula, Malakayan, Manggasinoro, Manlokoloko, Mayapis, Meranti putih, Murut, Pendan, Philippine mahogany, Seraya putah, Takuban, Takulau, Tavoy wood, Thingadu, Tiaong, Urat mata, White lauan, White seraya, Yauaan

Distributed in: Brunei, Indonesia, Malaysia, Philippines (Oceania and S.E. Asia)

Distribution overview: The species is distributed in large quantities in Sabah and the PhilippinesParashorea is a comparatively small genus, and is represented over a wide area from Burma, Indo-China, Sumatra and the mala Penisula in the west to Borneo and the Philippines in the east. P. plicata occurs in the Philippines, and is found on practically all the Islands, except in northern Luzon. It is considered as one of the most abundant species in the islands.

Common uses: Balusters, Bedroom suites, Boat building, Boat building: decking, Boat building: framing, Boat building: planking, Building construction, Building materials, Cabinetmaking, Canoes, Carvings, Chairs, Chests, Concealed parts (Furniture), Construction, Core Stock, Decks, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Domestic flooring, Dowell pins, Dowells, Drawer sides, Excelsior, Factory flooring, Figured veneer, Fine furniture, Floor lamps, Flooring, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Heavy construction, Interior construction, Joinery, Kitchen cabinets, Lifeboats, Light construction, Living-room suites, Mine timbers, Moldings, Musical instruments, Office furniture, Paneling, Parquet flooring, Particleboard, Plain veneer, Plywood corestock, Plywood, Pulp/Paper products, Radio - stereo - TV cabinets, Rustic furniture, Shipbuilding, Stairworks, Stools, Stringers, Structural plywood, Sub-flooring, Toothpicks, Toys, Turnery, Utility plywood, Vehicle parts, Veneer, Veneer: decorative

Environment profile: Status within its natural growth range has not been officially assessed

Tree size: Trunk diameter is 150-200 cm

Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodWhite to yellow, Yellow.The grain isStriped figure, the textureUniformand the lusterSlightly lustrous

Natural durability: Susceptible to marine borer attack, Susceptible to termite attack

Odor: No specific smell or taste

Kiln Schedules: US=T10D5S/T8D4S

Kiln Drying Rate: Rapid (<10 days for boards < 32 mm, to <30 days for boards >= 63 mm)

Drying Defects: Slight surface checking, Slight twist/warp

Ease of Drying: Shrinkage from Green to 12% MC

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good Tyloses are abundant in the wood. Some trees may contain brittleheart but it extends less than 120 mm from the pith

Blunting Effect: Slight blunting effect on cutters

Boring: Good (75+ pieces out of 100 will yield good to excellent results)

Carving: Very good results

Cutting Resistance: Saws well

Gluing: Satisfactory gluing properties

Mortising: good

Moulding: Fairly Easy to Very Easy

Movement in Service: Fairly Easy to Very Easy

Nailing: Satisfactory nailing properties, Very Good to Excellent

Planing: Very Good to Excellent

Resistance to Impregnation: Sapwood is moderately resistant

Response to hand tools: Slight dulling effect on cutting edges

Routing recessing: Routing is easy

Sanding: Yields a smooth surface

Veneering qualities: Easy to cut, There is slight to moderate drying degrade and the potential for buckles and splits

Steam bending: Very poor

Screwing: Fairly Easy to Very Easy, Very Good to Excellent Results; Turning: Yields fairly smooth surfaces

Painting: Good; Polishing: Satisfactory; Staining: Stains well; Varnishing: Varnish well after filling ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,41 0,45
Density 528 kg/m3
Bending Strength 606 881 kg/cm2
Crushing Strength 40 59 kg/cm2
Hardness 376 kg
Impact Strength 65 65 cm
Shearing Strength 89 kg/cm2
Stiffness 102 118 1000 kg/cm2
Tangential Shrinkage 7 %
Radial Shrinkage 3 %
Weight 512 512 kg/m3
Maximum Load 0,42 0,7 cm-kg/cm3
Toughness 367 cm-kg
Static Bending 365 561 kg/cm2
Item Green Dry English
Bending Strength 8633 12540 psi
Crushing Strength 578 843 psi
Density 33 lbs/ft3
Hardness 830 lbs
Impact Strength 26 26 inches
Maximum Crushing Strength 4292 6726 psi
Shearing Strength 1274 psi
Static Bending 5192 7992 psi
Stiffness 1464 1688 1000 psi
Toughness 319 inch-lbs
Work to Maximum Load 6 10 inch-lbs/in3
Specific Gravity 0.41 0.45
Weight 32 32 lbs/ft3
Radial Shrinkage 3 %
Tangential Shrinkage 7 %
Volumetric Shrinkage 7 %

Density (dry weight) = 31-37 lbs/cu. ft. 0
Max. crushing strength = medium 0
Hardness (side grain) = soft 0
Shrinkage, Tangential = moderate 0
Shrinkage, Radial = very small 0
Modulus of Elasticity (stiffness) = low 0
Bending strength (MOR) = medium 0
Density (dry weight) = 38-45 lbs/cu. ft.
Shrinkage, Radial = small
Shearing strength (parallel to grain) = very low
Shearing strength (parallel to grain) = low
Modulus of Elasticity (stiffness) = medium
Shrinkage, Tangential = fairly large
Bending strength (MOR) = low
Toughness-Hammer drop (Impact Strength) = low
Shrinkage, Tangential = very small
Shrinkage, Radial = moderate
Shrinkage, Radial = fairly large
Toughness-Hammer drop (Impact Strength) = very low
Shrinkage, Volumetric = very small
Shrinkage, Volumetric = small
Shrinkage, Tangential = small
It compares favorably with Teak, which also has high bending strength. Some familiar species with high crushing strength parallel to grain include Hard maple, Teak, and White oak. It resists denting and marring about as well as white oak or birch.
Weight = medium
Shrinkage, Tangential = large
Shrinkage, Radial = large
Modulus of Elasticity (stiffness) = very low
Max. crushing strength = high
Hardness (side grain) = very soft
Hardness (side grain) = medium
Density = high
Density (dry weight) = 23-30 lbs/cu. ft.
Crushing strength = high
Compression strength (parallel to grain) = high
Bending strength in the air-dry condition (about 12 percent moisture content) is high
Bending strength (MOR) = high

Aguilar, L.,1941,Relative Durability of Untreated Philippine woods,The Philippine Journal of Forestry 4(3) pp247-56Ashton, P.S.,1964,A manual of the Dipterocarp trees of Brunei State,O.U.P. LondonBodig, J. and B. A. Jayne. 1982. Mechanics of Wood and Wood Composites. Van Nostrand Reinhold Company, New York.Browne, F.G.,1955,Forest Trees of Sarawak and Brunei and their Products.,Government Printing Office, Kuching, SarawakBrown, 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 UniversityBrown, W.H.,1978,Timbers of the World, No. 4 South East Asia,TRADA, Red Booklet SeriesBrown, W.H.,1978,Timbers of the World, No.5 Philippines and Japan,TRADA, Red Booklet SeriesBurgess, P.F.,1966,Timbers of Sabah,Sabah Forest Record, no.6Chowdhury, 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.Clifford, N.,1957,Timber Identification for the Builder and Architect,Leonard Hill (Books) LTD. LondonCortes, R.T.,1940,Impact bending properties of twelve Philippine Dipterocarps,Philippine Journal of Forestry 3(3) pp325-43Desch, H.E.,1948,The Cedars,Wood 13(2) pp40-3Floresca, A.R.,1974,Shrinkage characteristics of Philippine mahogany,Foxpride Digest 3(1/2) pp85-6Forest Products Research Laboratory, U.K.,1960,Parashorea malaanonan (Blanco) Merr. Consignment 964,Forest Products Research Laboratory, Princes Risborough Timber Leaflet 13Forest Products Research Laboratory, U.K.,1969,The Movement of Timbers,Forest Products Research Laboratory, Princes Risborough Technical Note,No.38Forests Products Research Laboratory, U.K.,1956,A Handbook of Hardwoods,Forest Products Research Laboratory, Princes Risborough, Department of,Science and Industrial Research, Building Research EstablishmentFrance - Centre Technique du Bois,1967,Les Bois de Lauan,C.T.B. Bull. Inform. Tech. No.41Howard, A.L.,1948,A Manual of Timbers of the World.,Macmillan & Co. Ltd. London 3rd ed.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 1993I.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 CuttingKeating, 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,1Kloot, N. H. and E. Bolza.1961.Properties of Timbers Imported into Australia.Technological Paper No. 12.Division of Forest Products, Commonwealth Scientific & Industrial Research Organization, Melbourne, Australia.Kraemer, J.H.,1951,Trees of the Western Pacific Region,West Lafayette, Indiana U.S.A.Kukachka, B.F.,1970,Properties of Imported Tropical Woods,Forest Research Paper FPL 125Kynoch, 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.7Lauricio, F. M., Bellosillo, S. B., The Mechanical and Related Properties of Philippine Woods, The Philippine Lumber Journal, 12(5):A-HLavers, G. M.1966.The Strength Properties of Timbers.Forest Products Research Bulletin, No. 50.Ministry of Technology, Her Majesty's Stationery Office, London.Lavers, G.M.,1983,The Strength Properties of Timber (3rd ed. revised Moore G.L.,Forest Products Research Laboratory, Princes Risborough, Building Research,Establishment Report (formerly Bulletin No.50)Lomibao, B.A.,1973,Guide to the identification of the woods of Philippine Dipterocarpaceae,Foxpride Digest 2(2) pp26-34Meijer, W., Wood, G.H.S.,1964,Dipterocarps of Sabah (North Borneo,Sabah Forest Department, Forest Record No.5Meniado, J.A.,1974,Timbers of the Philippines Vol.I,Govt. Printing Office, ManilaReyes, L.J.,1938,Philippine Woods,Commonwealth of the Philippines Department of Agriculture and Commerce,Technical Bulletin,No.7Sarawak Forest Department,Trees and Timbers of Sarawak and Brunei,Sarawak Forestry Department Leaflet No.34Schneider, E.E. 1916. Commercial Woods of the Philippines: Their Preparation and Uses. Bulletin No. 14. Department of the Interior, Bureau of Forestry, Manila, Philippines.Smith, D.N.,1959,The Natural Durability of Timber,Forest Products Research Laboratory, Princes Risborough, Building Research,Establishment Record,No.30Tamesis, F., Aguilar, L.,1953,The 'Philippine mahogany' and other Dipterocarp woods,Philippine Department of Agriculture and Natural Research Popular Bulletin,No.44Thomas, A.V.,1935,Tests from timbers from the state of North Borneo: Tests on urat mata,(Parashorea sp.) and belian (Eusideroxylon zwageri) in a green condition.,Malayan Forester 4 pp131-5Timber Development Association Ltd.,1955,World Timbers (3 Vols.,Timber Development Association Ltd.U.S.D.A. Forest Service,1974,Wood Handbook,U.S.A. Department of Agriculture, Forest Service Handbook,72Varian, H.F., Gallardo, A.C.,1940,Notes on the susceptibility to insect attack of Philippine woods,Philippine Journal of forestry 3(3) pp347-78
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