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Sepetir
Sepetir (Pseudosindora palustris)

Family: Leguminosae

Common names: Gu, Gu go, Kayu galu, Makata, Petir, Sapa, Sepetir, Sepetir Paya, Sindur, Supa, Swamp sepetir, Tampar hantu

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

Distribution overview: Distributed in Malaysia, Indochina, and the Philippines, and is usually found in lowland forests. It is often common in localized areas within its range.

Common uses: Agricultural implements, Boat building (general), Boxes and crates, Brush backs & handles, Cabinetmaking, Excelsior, Flooring, Furniture, General carpentry, Joinery, Light construction, Paneling, Plywood, Sporting Goods, Veneer: decorative

Environment profile: Status has not been officially assessed

Tree size: Tree height is 30-40 m

Colors: the heart isReddish brown with dark streaks after aging , Yellow to golden-yellow to orangeand the sapwoodWhite/Straw , Yellow.The grain isVariable figure, the textureModerately fine & uniform and the lusterMedium

Natural durability: Susceptible to termite and dry wood insect attack, Very little natural resistance

Odor: Spicy scent

LightInduced Color Change: Darker

Kiln Schedules: UK=G US=T8B3/T5B1

Kiln Drying Rate: Very slow (>28 days for boards < 32 mm, to >84 days for boards >= 63 mm)

Drying Defects: Slight end splitting, Slight twist/warp

Ease of Drying: Easy

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good Resinous

Blunting Effect: Medium effect

Boring: Moderately easy

Cutting Resistance: Difficult due to resin and gum accumulation

Nailing: Holds nails well, Some tendency for splitting

Planing: Sharp cutting edges recommended

Resistance to Impregnation: Sapwood is modertely permeable

Resistance to Splitting: Poor

Response to hand tools: Easy to machine

Sanding: Fairly good sanding characteristics

Veneering qualities: No drying degrade. Dries flat without splitting, There is slight to moderate drying degrade and the potential for buckles and splits

Steam bending: Poor because of resin exudation

Turning: Turns with moderate ease

Polishing: Satisfactory; Staining: Generally good after filling ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,54
Density 657 kg/m3
Bending Strength 728 1129 kg/cm2
Crushing Strength 381 599 kg/cm2
Hardness 626 kg
Impact Strength 63 86 cm
Shearing Strength 144 kg/cm2
Stiffness 109 131 1000 kg/cm2
Tangential Shrinkage 5 %
Radial Shrinkage 3 %
Weight 657 641 kg/m3
Maximum Load 0,91 0,91 cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 10362 16063 psi
Density 41 lbs/ft3
Hardness 1382 lbs
Impact Strength 25 34 inches
Maximum Crushing Strength 5421 8526 psi
Shearing Strength 2054 psi
Stiffness 1558 1875 1000 psi
Work to Maximum Load 13 13 inch-lbs/in3
Specific Gravity 0.54
Weight 41 40 lbs/ft3
Radial Shrinkage 3 %
Tangential Shrinkage 5 %
Volumetric Shrinkage 10 %

Density (dry weight) = 38-45 lbs/cu. ft. 0
Density (dry weight) = 46-52 lbs/cu. ft.
Max. crushing strength = medium
Modulus of Elasticity (stiffness) = medium
Modulus of Elasticity (stiffness) = low
Max. crushing strength = high
Bending strength (MOR) = low
Toughness-Hammer drop (Impact Strength) = medium
Toughness-Hammer drop (Impact Strength) = low
Shrinkage, Tangential = very small
Shrinkage, Radial = very small
Bending strength (MOR) = high
Shearing strength (parallel to grain) = very low
Shearing strength (parallel to grain) = very high
Density (dry weight) = 31-37 lbs/cu. ft.
Shrinkage, Tangential = moderate
Shrinkage, Radial = small
Resists denting and marring
Heavy
Hardness (side grain) = medium
Density = high
Compression strength (parallel to grain) = very high
Bending strength (MOR) = very high
Bending strength (MOR) = medium

Australia - Forest Products Newsletter,1963,Properties of Australian Timbers - Blackwood,C.S.I.R.O. Forest Products Newsletter No.294 pp3-4Brazier, J.D.,1959,Pseudosindora palustris sym - An account of its timber and anatomical,evidence for its taxonomic status,Proceedings of the Linnean Society of London 170(2) pp178-83Browne, F.G.,1955,Forest Trees of Sarawak and Brunei and their Products.,Government Printing Office, Kuching, SarawakBurgess, P.F.,1966,Timbers of Sabah,Sabah Forest Record, no.6Chudnoff, 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.15Farmer, R.H.,1972,Handbook of Hardwoods,HMSOForest Products Research Laboratory, U.K.,1954,Hardwoods for Industrial Flooring,Forest Products Research Laboratory, Princes Risborough, Leaflet, No.48Forest Products Research Laboratory, U.K.,1954,Trials of Timbers for Plywood manufacture sepetir pseudosindora palustris,Forest Products Research Laboratory, Princes Risborough Progress Report 24,Consignment 781Forest Products Research Laboratory, U.K.,1967,The Steam Bending Properties of various timbers,Forest Products Research Laboratory, Princes Risborough, Leaflet,No.45Forest 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 EstablishmentHMSO.1972.Handbook of Hardwoods, 2nd Edition.Revised by R.H. Farmer.Department of the Environment, Building Research Establishment, Princes Risborough Laboratory, Her Majesty's Stationery Office, London.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 CuttingLavers, 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)Malaysian Timber Industry Board,1986,100 Malaysian Timbers,The Malaysian Timber Industry BoardRendle, B.J.,1969,World Timbers (3 Vols.,Ernest Benn Ltd. LondonSarawak - Borneo Lit.Bureau,1961,Common Sarawak timbers,Borneo Lit. Bureau for Sarawak Forestry DepartmentSmythies, B.E.,1965,Common Sarawak Trees,Borneo Literature BureauSymington, C.F.,1943,Pseudosindora palystris (Leguminosae, Amherstieae) a new genus and species,in Borneo,Proceedings of the Linnean Society of London 155(3) pp285-8Timber Review,1976,Sepetir (Sindora Spp. and Pseudosindora palustris,Timber Review,27 p15-6Tsumoto, T., Karasawa, H.,1975,The Properties of Tropical Woods 21,Government of Japan Forest Experimental Station Bulletin,No.227
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