This European Standard specifies general requirements and appearance classes for both single-layer and multi-layer solid wood panels, the latter with a minimum thickness of the outer layers of 3,5 mm, manufactured from softwood species (e.g. spruce, pine, larch).
BS EN 13017-1:2001 history
2001BS EN 13017-1:2001 Solid wood panels - Classification by surface appearance - Solid wood panels - Classification by surface appearance - Softwood