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Bang-lang
Bang-lang (Lagerstroemia tomentosa)

Family: Lythraceae

Common names: Bang-lang, Kamaungthwe, Leza, Leza wood, Pyinmapyu, Salao, Sralao

Distributed in: Burma, India (Oceania and S.E. Asia)

Distribution overview: Indo-Malayan region including Indochina and extending into Indonesia and the Philippines; along rivers and on moist flat land; often cultivated as an ornamental.

Common uses: Boat building: framing, Chairs, Door, Flooring, Furniture, Heavy construction, Joinery, Light construction, Paneling, Plywood, Poles, Railroad ties, Sporting Goods, Structural work, Tool handles, Vehicle parts

Tree size: Tree height is 10-20 m

Colors: the heart isReddish brown, Yellowand the sapwoodWhite to yellow, Yellow.The grain isStraight, the textureMediumand the lusterMedium

Natural durability: Resistant to marine borers, Susceptible to insect attack

Kiln Schedules: Kiln Drying Rate (in days) is fairly rapid

Kiln Drying Rate: Naturally dries quickly

Drying Defects: Distortion, Internal Honeycombing Possible

Ease of Drying: Rapidly

Comments: General finishing qualities are rated as good

Blunting Effect: Little

Cutting Resistance: Easy to saw

Gluing: Fairly Easy to Very Easy

Nailing: Pre-Boring Recommended, Very Good to Excellent

Planing: Fairly Easy to Very Easy

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Easy to machine

Steam bending: Fair to Good Results

Screwing: Fairly Easy to Very Easy, Pre-boring recommended;

Polishing: Satisfactory; Staining: Fair to Good;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 641 kg/m3
Bending Strength 748 1161 kg/cm2
Crushing Strength 401 599 kg/cm2
Hardness 601 kg
Impact Strength cm
Shearing Strength 139 kg/cm2
Stiffness 94 109 1000 kg/cm2
Tangential Shrinkage 10 %
Radial Shrinkage 6 %
Weight 624 496 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 10643 16517 psi
Density 40 lbs/ft3
Hardness 1326 lbs
Maximum Crushing Strength 5706 8526 psi
Shearing Strength 1989 psi
Stiffness 1347 1563 1000 psi
Weight 39 31 lbs/ft3
Radial Shrinkage 6 %
Tangential Shrinkage 10 %
Volumetric Shrinkage 8 %

Density (dry weight) = 38-45 lbs/cu. ft.
Max. crushing strength = high
Shearing strength (parallel to grain) = medium
Max. crushing strength = medium
Hardness (side grain) = soft
Hardness (side grain) = medium
Bending strength (MOR) = high
Shrinkage, Volumetric = very small
Shrinkage, Volumetric = small
Shrinkage, Volumetric = moderate
Shrinkage, Tangential = large
Shrinkage, Radial = large
Shearing strength (parallel to grain) = low
Modulus of Elasticity (stiffness) = very low
Modulus of Elasticity (stiffness) = medium
Modulus of Elasticity (stiffness) = low
Bending strength (MOR) = medium
Bending strength (MOR) = low

Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Gamble, J.S.,1902,A Manual of Indian Timbers,Sampson Low, Marston & Co. LondonHoward, A.L.,1948,A Manual of Timbers of the World.,Macmillan & Co. Ltd. London 3rd ed.Limaye, V.D.,1957,Grouping of Indian Timbers and Their Properties, Uses and Suitability.,Indian Forest Records (N.S. Timber Mechanics Vol.1 No.2)Pearson, R.S., Brown, H.P.,1932,Commercial Timbers of India,Govt. Printer Calcutta,2 volsPurkayastha, S.K.,1982,Indian woods: Their identifications, properties and uses, Vol. IV,Myrlacene to Symploceae,Controller of Publications, New DelhiSallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TSono, P.,1974,Merchantable Timbers of Thailand.,Forest Products Research Division, Royal Forest Department, Bangkok,,Thailand.
*Come interpretare i dati (manleva su eventuali imprecisioni)