Mechanical Properties of Picea sitchensis
This study establishes the basis for the assignment of Danish-grown Sitka spruce (Picea sitchensis) to the European strength class system (EN 338). In total, 712 boards were chosen to be representative of the normal Danish commodity. These were visually graded for strength according to Nordic rules (INSTA 142), and subsequently tested to failure in either bending or tension. The results show that Danish-grown Sitka spruce graded to levels T1 and T2 satisfy the requirements of EN 338 at the C18 and C24 levels, respectively. Results for Danish-grown Sitka spruce concur with those for Danish-grown Norway spruce (Picea abies). This study shows that Sitka spruce and Norway spruce of similar origins exhibit highly comparable mechanical properties.