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Clinker beech
Clinker beech (Nothofagus truncata)

Family: Fagaceae

Common names: Clinker beech, Hard beech

Distributed in: Australia, New Zealand (Oceania and S.E. Asia)

Common uses: Boat building (general), Flooring, Heavy construction, Mine timbers, Poles, Posts, Railroad ties

Tree size: Tree height is 10-20 m

Colors: the heart isPink, Redand the sapwoodBrown, Green/Grey.The grain isStripe (figure), the textureMedium

Natural durability: Non-resistant to termites, Susceptible to insect attack

Kiln Drying Rate: Naturally dries quickly

Drying Defects: Moderate surface checking, Splitting

Ease of Drying: Rapidly

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: Fairly Easy to Very Easy

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Easy to Work

Sanding: Fairly Difficult to Very Difficult


Painting: Fair to Good; Varnishing: Fairly Easy to Very Easy;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 689 kg/m3
Bending Strength 667 1040 kg/cm2
Crushing Strength 275 449 kg/cm2
Hardness 752 kg
Impact Strength cm
Shearing Strength 139 kg/cm2
Stiffness 115 133 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 673 544 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 9488 14801 psi
Density 43 lbs/ft3
Hardness 1658 lbs
Maximum Crushing Strength 3916 6397 psi
Shearing Strength 1989 psi
Stiffness 1646 1899 1000 psi
Weight 42 34 lbs/ft3
Radial Shrinkage 5 %
Volumetric Shrinkage 15 %

Bending strength (MOR) = medium
Modulus of Elasticity (stiffness) = medium
Shearing strength (parallel to grain) = medium
Modulus of Elasticity (stiffness) = low
Max. crushing strength = medium
Hardness (side grain) = medium
Shrinkage, Volumetric = large
Shrinkage, Radial = large
Shrinkage, Radial = fairly large
Shearing strength (parallel to grain) = low
Modulus of Elasticity (stiffness) = high
Density (dry weight) = 46-52 lbs/cu. ft.
Density (dry weight) = 38-45 lbs/cu. ft.
Bending strength (MOR) = low
Bending strength (MOR) = high

Bier, H.,1983,The strength properties of small clear specimens of New Zealand-grown,timber,New Zealand Forest Service Forest Research Institute, FRI Bulletin No.41Entrican, A.R., Et al,1951,The Physical and Mechanical properties of the principal indegenous woods,of New Zealand,New Zealand Forest Service, Wellington NZReid, J.S.,1953,Beech Timbers,New Zealand Forest Service Information Series No.17Rendle, B.J.,1969,World Timbers (3 Vols.,Ernest Benn Ltd. London
*Come interpretare i dati (manleva su eventuali imprecisioni)