Variability of density and bending properties of Picea abies structural timber
2012
Vestøl, Geir I. | Høibø, Olav | Langsethagen, Kenneth G. | Skaug, Eivind | Skyrud, Runa Elisabeth A.
Density, modulus of elasticity and bending strength were measured on 333 boards from 54 Picea abies trees, sampled from six sites in a small area in southern Norway. The variability of the properties was analysed in a linear mixed model with relative tree size and log type as fixed effects, and with site and tree as random variables. Relative tree size was the most important fixed effect, and both density, MOE and MOR all decreased with increasing relative tree size. Log type explained a smaller part of the variance, but it was important when predicting MOR from MOE since these had different longitudinal variations.
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