Impact of growth rate on the mechanical properties of Douglas-fir grown in Wallonia (Southern Belgium)

Timber is traditionally the main purpose of Douglas-fir in Europe. However, some uncertainties remain concerning the sylviculture that should be applied in order to maximise girth growth rate (GR) without affecting the good mechanical properties of the wood. So, the present study aimed at assessing to what extent the GR of Douglas-firs grown in Wallonia influences the mechanical properties of wood clear samples. The modulus of elasticity (E) and static bending strength (σf) were measured according to NF B51-016 and NF B51-008 and are discussed according to the ring width measured on the sample... Mehr ...