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MersawaMersawa
Mersawa (Anisoptera cochinchinensis)

Family: Dipterocarpaceae

Common names: Basoeng, Kaunghmu, Mersawa, Palosapis, Pengiran, Phdiek, Ven ven

Distributed in: Cambodia, China, India, Indonesia, Laos, Malaysia, Myanmar, Philippines, Thailand, Vietnam (Oceania and S.E. Asia)

Distribution overview: This species is known to be in Cambodia, typically in multi-storey forests consisting of more than 80% of evergreen species The main characteristic species of these forests are Dipterocarpus dyeri. D. corbatus. D. Alatus. Anisoptera cochinchinensis, Hopea adorata, H. pierrei, Roherea vulgaris, and Syzygium spp. Species in the Anisoptera genus are found throughout the Malaysis region.

Common uses: Balusters, Beams, Boat building, Boxes and crates, Building construction, Building materials, Cabin construction, Canoes, Casks, Concrete formwork, Construction, Decks, Decorative plywood, Decorative veneer, Domestic flooring, Excelsior, Factory construction, Figured veneer, Flooring, Form work, Foundation posts, Framing, Handles, Heavy construction, Interior construction, Interior trim, Joinery, Joists, Lifeboats, Light construction, Moldings, Novelties, Packing cases, Parquet flooring, Planks, Plywood, Porch columns, Rough construction, Shafts/Handles, Shipbuilding, Tool handles, Vehicle parts

Environment profile: Generally secure within its natural habitat

Tree size: Trunk diameter is 100-150 cm

Colors: the heart isLight buff to yellowish brown, Yellowand the sapwoodPale yellow, Yellow.The grain isSpiral grain occasionally, the textureUniformand the lusterNon-lustrous

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

Odor: No specific taste

Silica Content: Siliceous

Kiln Schedules: T6-D4(4/4);T3-D1(8/4) US Schedule E; United Kingdom

Drying Defects: Uneven Moisture Content, Wet pockets may also cause uneven variations in drying rate

Ease of Drying: Slowly

Comments: Retards the setting of cement and should not be used for shuttering concrete

Blunting Effect: High to severe

Cutting Resistance: Fairly difficult to saw

Gluing: Glues well

Moulding: Very sharp cutting edges are required to produce a smooth surface

Movement in Service: Very sharp cutting edges are required to produce a smooth surface

Nailing: Good nailing characteristics, Very Good to Excellent

Planing: Reduced cutting angle of 20 degrees is recommended for best

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Responds Readily

Sanding: Responds well to sanding operations

Steam bending: Poor to Very Poor Results

Screwing: Holds screws well , Very Good to Excellent Results; Turning: Fairly Easy to Very Easy

Polishing: Poor to Very Poor; Staining: Stains satisfactorily after surface preparation ;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,51 0,52
Density 624 kg/m3
Bending Strength 519 789 kg/cm2
Crushing Strength 259 459 kg/cm2
Hardness kg
Impact Strength cm
Shearing Strength 116 kg/cm2
Stiffness 90 106 1000 kg/cm2
Tangential Shrinkage 9 %
Radial Shrinkage 4 %
Weight 608 496 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 7389 11226 psi
Density 39 lbs/ft3
Maximum Crushing Strength 3695 6537 psi
Shearing Strength 1662 psi
Stiffness 1293 1520 1000 psi
Specific Gravity 0.51 0.52
Weight 38 31. lbs/ft3
Radial Shrinkage 4 %
Tangential Shrinkage 9 %
Volumetric Shrinkage 14 %

High in density
Heavy
Crushing strength = high
Compression strength (parallel to grain) = high
Bending strength (MOR) = high
It compares favorably with Teak, which also has high bending strength. Teak, White oak, and Hard maple have high crushing strength

Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Eddowes, P. J. 1961. Commercial Timbers of Papua New Guinea: Their Properties and Uses. Office of Forests, Papua New Guinea.HMSO. 1981. Handbook of Hardwoods, 2nd Edition. revised by R.H. Farmer. Department of the Environment, Building Research Establishment, Princes Risborough Laboratory, Princes Risborough, Aylesbury, Buckinghamshire.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,1Lincoln, W.A. 1986. World Woods in Color. Linden Publishing Co. Inc., Fresno, California.
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