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Holz als Roh- und Werkstoff

, Volume 58, Issue 5, pp 344–352 | Cite as

Stiffness of spruce wood – Influence of moisture conditions

  • C. Bengtsson
Originalarbeiten · Originals

3

, from Norway Spruce are presented. The measurements were carried out using a dynamic test method at equilibrium moisture content in 30% and 90% relative humidity. The test material, from two stands, was well defined with respect to growth conditions, material properties as knots and compression wood and position in the tree. Large variations in dynamic modulus of elasticity between the two moisture levels were found. For specimens from some trees, these variations were extremely large. The variations were not systematic within each tree as many other wood parameters. A part of the variations was explained by occurrence of compression wood and knots. A strong individual variation in stiffness between different trees was found. To achieve a more fundamental understanding of the relationships between stiffness and moisture content it appeared that also microscopic characteristics need to be taken into account.

Keywords

Relative Humidity Material Property Growth Condition Timber Individual Variation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Steifheit von Fichtenholz – Einfluß der Feuchtebedingungen

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • C. Bengtsson
    • 1
  1. 1.Chalmers University of Technology, Division of Steel and Timber Structures, SE-412 96 Göteborg, SwedenSE

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