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Burma padauk
Burma padauk (Pterocarpus macrocarpus)

Family: Leguminosae

Common names: Burma padauk, Mai pradoo, Mai-chi-tawk, Mai-pi-tawk, Padauk, Pradoo, Pterocarpus

Distributed in: Burma, Laos, Myanmar, Philippines, Thailand, Vietnam (Oceania and S.E. Asia)

Distribution overview: The genus Pterocarpus is made up of about 60 species of small and large trees that are distributed in the tropical regions of the world. P. macrocarpus is common in the upper mixed and dry forests of Myanmar (Burma). It is also reported to occur in the mixed deciduous forests of Thailand, and is usually found growing in mixed stands with Teak (Tectona grandis) and Indian laurel (Terminalia tomentosa).

Common uses: Agricultural implements, Bedroom suites, Billiard boxes, Billiard-cue butts, Boat building (general), Boat building: framing, Building construction, Building materials, Cabin construction, Cabinetmaking, Carvings, Chairs, Chests, Concealed parts (Furniture), Construction, Desks, Dining-room furniture, Domestic flooring, Dowell pins, Dowells, Drawer sides, Excelsior, Factory construction, Fine furniture, Floor lamps, Flooring, Flooring: industrial heavy traffic, Furniture , Furniture components, Furniture squares or stock, Furniture, Handles, Handles: general, Hatracks, Heavy construction, Joinery, Kitchen cabinets, Ladders, Light construction, Living-room suites, Mine timbers, Musical instruments: strings, Office furniture, Paneling, Parquet flooring, Piling, Plywood, Radio - stereo - TV cabinets, Railroad ties, Rustic furniture, Shafts/Handles, Sporting Goods, Stools, Tables, Tool handles, Toys, Turnery, Vehicle parts, Veneer, Wheel spokes, Wheels

Product sources: Burma padauk is available in both veneer and lumber forms from importers, but prices are typically in the costly range.

Environment profile: Status unknown in many of its growth areas

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodWhite/Gray , Yellow.The grain isStriped figure, the textureMedium to coarseand the lusterMedium to high

Natural durability: Very durable, Very good weathering properties

Odor: Spicy scent

LightInduced Color Change: Lighter

Kiln Schedules: UK=F US=T6D4/T3D3 Fr=6

Drying Defects: Severe surface checking, Slight surface checking

Ease of Drying: Reconditioning Treatement

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as satisfactory

Blunting Effect: Medium effect

Boring: Fairly easy to very easy

Carving: Poor to very poor response to preservative treatment

Cutting Resistance: Seasoned wood is refractory making it difficult to saw

Gluing: Satisfactory gluing properties

Mortising: Fairly Easy to Very Easy

Moulding: Poor moulding

Movement in Service: Poor moulding

Nailing: Possible if prebored, Very Good to Excellent

Planing: Reduction of cutting angle recommended

Resistance to Impregnation: Sapwood is moderately resistant

Resistance to Splitting: Poor

Response to hand tools: Responds Readily

Routing recessing: Fairly Easy to Very Easy

Sanding: Good sanding finish

Veneering qualities: Cut surfaces are usually smooth and glossy , Suitable for slicing

Screwing: Possible if prebored, Screwing yields good results; Turning: Good results

Polishing: Takes high polish;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,73 0,77
Density 865 kg/m3
Bending Strength 983 1379 kg/cm2
Crushing Strength 500 699 kg/cm2
Hardness 1028 kg
Impact Strength 129 101 cm
Shearing Strength 132 kg/cm2
Stiffness 125 141 1000 kg/cm2
Tangential Shrinkage 5 %
Radial Shrinkage 3 %
Weight 865 833 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 13987 19614 psi
Density 54 lbs/ft3
Hardness 2267 lbs
Impact Strength 51 40 inches
Maximum Crushing Strength 7112 9943 psi
Shearing Strength 1883 psi
Stiffness 1791 2011 1000 psi
Specific Gravity 0.73 0.77
Weight 54 52 lbs/ft3
Radial Shrinkage 3 %
Tangential Shrinkage 5 %
Volumetric Shrinkage 8 %

Density (dry weight) = 53-60 lbs/cu. ft. 0
Max. crushing strength = high
Density (dry weight) = 46-52 lbs/cu. ft.
Shrinkage, Tangential = small
Modulus of Elasticity (stiffness) = medium
Hardness (side grain) = hard
Bending strength (MOR) = high
Shrinkage, Radial = small
Max. crushing strength = medium
Bending strength (MOR) = medium
Shrinkage, Tangential = very small
Shrinkage, Radial = very small
Shearing strength (parallel to grain) = medium
Shearing strength (parallel to grain) = low
Modulus of Elasticity (stiffness) = low
Density (dry weight) = 61-67 lbs/cu. ft.
Very heavy
Modulus of Elasticity (stiffness) = high
Density = very high
Compression strength (parallel to grain) = very high
Bending strength (MOR) = very high
It is one of the strongest and hardest of timbers from Southeast Asia, with strength properties that are considerably superior to those of Andaman padauk (P. dalbergioides ) and Burma teak (Tectona grandis ).

Boone, R.S., C.J. Kozlik, P.J. Bois and E.M. Wengert. 1988. Dry Kiln Schedules for Commercial Woods: Temperate and Tropical. United States Department of Agriculture, Forest Service, Forest Products Laboratory, General Technical Report FPL-GTR-57, Madison, Wisconsin.Carrapiett, J.B.,1960,Notes on ornamental timbers of Burma,Burmese Forester,10(1,pp37-53Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Farmer, R.H.,1972,Handbook of Hardwoods,HMSOForests Products Research Laboratory, U.K.,1956,A Handbook of Hardwoods,Forest Products Research Laboratory, Princes Risborough, Department of,Science and Industrial Research, Building Research EstablishmentGamble, J.S.,1902,A Manual of Indian Timbers,Sampson Low, Marston & Co. LondonHMSO.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.Howard, A.L.,1948,A Manual of Timbers of the World.,Macmillan & Co. Ltd. London 3rd ed.Kaiser, J.Wood of the Month:Padauk - A Red Wood by Another Name.Wood & Wood Products, July, 1990.Page 68.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,1Kline, M.1982. Pterocarpus macrocarpus - Burma padauk. In A Guide to Useful Woods of the World. Flynn Jr., J.H., Editor. King Philip Publishing Co., Portland, Maine. 1994. Page 297-298.Kloot, 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.Limaye, V.D.1954. Grouping of Indian Timbers and their Properties, Uses and Suitability. Indian Forest Records, New Series. Timber Mechanics, Vol. 1, No. 2, Forest Research Institute, Dehra Dun, India.Limaye, V.D. and B.R. Sen. 1953. Weights and Specific Gravities of Indian Woods. Indian Forest Records, New Series. Timber Mechanics, Vol. 1, No. 4, Forest Research Institute, Dehra Dun, India.Lincoln, W.A. 1986. World Woods in Color. Linden Publishing Co. Inc., Fresno, California.Patterson, D.,1988,Commercial Timbers of the World, 5th Edition,Gower Technical PressPearson, R.S., Brown, H.P.,1932,Commercial Timbers of India,Govt. Printer Calcutta,2 volsRamesh, Rao K., Purkayastha, S.K.,1972,Indian Woods - Their Identification Properties and Uses,Dehra Dun India,Vol. 3Rao, K.R. and S.K. Purkayastha. 1972. Indian Woods - Their Identification, Properties and Uses, Volume III - Leguminosae to Combretaceae. Published by the Manager of Publications, Delhi, India.Rendle, B.J.,1969,World Timbers (3 Vols.,Ernest Benn Ltd. LondonSono, P.,1974,Merchantable Timbers of Thailand.,Forest Products Research Division, Royal Forest Department, Bangkok,,Thailand.Tewari, M.C., Jain, J.C.,1980,Utilization of Secondary Species,Journal of the National Building Organization 25(2) pp1-6Timber Development Association,1948,Some New Timbers and Their Uses No. 34,Timber Development Association Limited, London [TRADA]WCMC. 1992. Conservation Status Listing - Trees and Timbers of the World. World Conservation Monitoring Center-Plants Programme, Cambridge, CB3 ODL, United Kingdom.
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