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Bastard locust
Bastard locust (Lonchocarpus hedyosmus)

Family: Leguminosae

Common names: Bastard locust, Nickerie basralokus, Sindjaple

Distributed in: Guyana, Suriname (Latin America)

Distribution overview: The Lonchocarpus group is found throughout tropical America; generally on open hillsides and rather dry plains at low or moderate elevations.￿ In Surinam occasional to locally frequent in high forests and marsh forests on alluvial flats.￿

Common uses: Bridge construction, Flooring: industrial heavy traffic, Heavy construction, Joinery, Light construction, Mine timbers, Piling, Turnery, Wheel spokes, Wheels

Environment profile: Abundant/Secure

Tree size: Trunk diameter is 200-250 cm

Colors: the heart isYellow, Yellow to golden-yellow to orangeand the sapwoodWhite to yellow, Yellow.The grain isStraight, the textureMedium coarse to coarseand the lusterMedium

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

Odor: Has a taste

Silica Content: Moderate

LightInduced Color Change: Darker

Kiln Drying Rate: Naturally dries slowly

Drying Defects: Ring Shakes, Splitting

Ease of Drying: Slowly

Tree Identification: Bole/stem form is cylindrical

Blunting Effect: Little

Boring: Fairly easy to very easy

Carving: Fairly Easy to Very Easy

Cutting Resistance: Easy to saw

Gluing: Fairly Easy to Very Easy

Mortising: Very Good to Excellent

Moulding: Very Good to Excellent

Movement in Service: Very Good to Excellent

Nailing: Fairly Easy to Very Easy, Poor to Very Poor

Planing: Fairly Easy to Very Easy

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Responds Readily

Routing recessing: Fairly Easy to Very Easy

Sanding: Very Good to Excellent Results

Veneering qualities: Veneers easily, Veneers moderately easy

Steam bending: Fairly Easy to Very Easy

Screwing: Fair to Good Results, Fairly Easy to Very Easy; Turning: Very Good to Excellent Results

Painting: Good; Polishing: Very Good to Excellent; Staining: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 865 kg/m3
Bending Strength 804 1248 kg/cm2
Crushing Strength 485 699 kg/cm2
Hardness 1051 kg
Impact Strength cm
Shearing Strength 155 kg/cm2
Stiffness 134 155 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 3 %
Weight 849 689 kg/m3
Maximum Load 0,84 1,19 cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 11442 17761 psi
Density 54 lbs/ft3
Hardness 2318 lbs
Maximum Crushing Strength 6899 9945 psi
Shearing Strength 2205 psi
Stiffness 1916 2208 1000 psi
Work to Maximum Load 12 17 inch-lbs/in3
Weight 53 43 lbs/ft3
Radial Shrinkage 3 %
Tangential Shrinkage 7 %

Density (dry weight) = 53 - 60 lbs/cu. ft.
Shearing strength (parallel to grain) = medium
Max. crushing strength = high
Work to Maximum Load = medium
Shrinkage, Tangential = very small
Shrinkage, Tangential = moderate
Shrinkage, Tangential = fairly large
Shrinkage, Radial = very small
Shrinkage, Radial = small
Shrinkage, Radial = moderate
Modulus of Elasticity (stiffness) = medium
Modulus of Elasticity (stiffness) = high
Hardness (side grain) = hard
Density (dry weight) = 61 - 67 lbs/cu. ft.
Density (dry weight) = 46-52 lbs/cu. ft.
Bending strength (MOR) = medium
Bending strength (MOR) = high

Berni, C.A., Bolza, E., Christensen, F.J.,1979,South American Timbers - The Characteristics, Properties and Uses of 190,Species,C.S.I.R.O Div. Building ResearchFanshawe, D.B.,1954,Forest Products of British Guiana Part 1 Principal Timbers,Forest Department British Guiana Forestry Bulletin (New Series 2nd,Edition,No.1Vink, A.T.,1965,Surinam Timbers,Surinam Forest Service Paramaribo,3rd rev. ed.
*Come interpretare i dati (manleva su eventuali imprecisioni)