The relationship between dimensions, properties and bending strength of spruce timber was investigated. The size effect on the basis of the WEIBULL theory has been extended by the effect of the properties on the bending strength which was not sufficiently investigated so far. It is shown that the size effect consists of a direct as well as an indirect effect of timber dimensions on the bending strength. The indirect effect is based on the interaction between timber dimensions and timber properties and is therefore dependent on the grading method. Beside this relationship, the size effect significantly depends on the test method and can therefore, due to different test standards, differ between countries. Based on the results, recommendations for the modification of European standards for structural timber are derived.
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The relationship between dimensions, properties and bending strength of spruce timber was investigated. The size effect on the basis of the WEIBULL theory has been extended by the effect of the properties on the bending strength which was not sufficiently investigated so far. It is shown that the size effect consists of a direct as well as an indirect effect of timber dimensions on the bending strength. The indirect effect is based on the interaction between timber dimensions and timber properti...
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