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Light celtis
Light celtis (Celtis nymanii)

Family: Ulmaceae

Common names: Light celtis

Distributed in: Papua New Guinea, Solomon Islands (Oceania and S.E. Asia)

Distribution overview: Southeast Asia, primarily in Papua New Gunea and the Solomon Islands.

Common uses: Balusters, Barge fenders, Building construction, Building materials, Construction, Docks, Dockwork, Domestic flooring, Excelsior, Exterior trim & siding, Exterior uses, Flooring, Foundation posts, Harbor work, Interior construction, Joinery, Light construction, Marine construction, Moldings, Naval architecture, Parquet flooring, Poles, Posts, Raft floats, Rafts, Shakes, Sheathing, Shingles, Siding, Stairrails, Stairworks, Stakes, Stringers, Sub-flooring, Utility poles, Wharf construction

Environment profile: The environmental status of this species within its geographical boundaries has not been officially determined.

Tree size: Tree height is 30-40 m

Colors: the heart isRed, Yellowish brownand the sapwoodGreen/Grey, Red.The grain isWavy, the textureFine to mediumand the lusterLow

Natural durability: Resistant to powder post beetles, Susceptible to insect attack

Odor: No specific smell or taste

Kiln Drying Rate: Rapid

Drying Defects: Moderate end spitting, Splitting

Ease of Drying: Slowly

Comments: The timbers are tough and suitable for many exterior uses after treatment. Properties are dependent upon conditions at growing sites. Tension wood may also be present in the woodVaries significantly

Cutting Resistance: Easy to saw

Gluing: Fairly Easy to Very Easy

Mortising: Fairly Easy to Very Easy

Moulding: Fairly Easy to Very Easy

Movement in Service: Fairly Easy to Very Easy

Nailing: Fair to Good , Very Good to Excellent

Planing: Planes well, to a good finish

Resistance to Abrasion: Highly resistant to wear Suitable for exterior applications after proper protection against decay.

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Fairly Difficult to Difficult to Work

Sanding: Fair sanding qualities

Veneering qualities: Veneers easily, Veneers moderately easy

Steam bending: Poor to Very Poor Results

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

Polishing: Very Good to Excellent; Staining: Stains very well;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 560 kg/m3
Bending Strength 522 792 kg/cm2
Crushing Strength 13 35 kg/cm2
Hardness 321 kg
Impact Strength cm
Shearing Strength 93 kg/cm2
Stiffness 95 119 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage %
Weight kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending 321 549 kg/cm2
Item Green Dry English
Bending Strength 7428 11270 psi
Crushing Strength 191 512 psi
Density 35 lbs/ft3
Hardness 708 lbs
Maximum Crushing Strength 3900 6684 psi
Shearing Strength 1323 psi
Static Bending 4577 7811 psi
Stiffness 1352 1695 1000 psi
Toughness 91 inch-lbs

Hardness = medium
Compression strength (parallel to grain) = high
Bending strength (MOR) = high
Density is high

Bolza, E. and N. H. Kloot.1966.The Mechanical Properties of 81 New Guinea Timbers.Technological Paper No. 41.Division of Forest Products, Commonwealth Scientific & Industrial Research Organization (CSIRO, Melbourne, Australia.Eddowes, P. J.1977.Commercial Timbers of Papua New Guinea - Their Properties and Uses.Forest Products Research Center, Office of Forests, Department of Primary Industry, Papua New Guinea.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,1
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