The appearance of the wood determines its “grade.” All grades are equally strong and serviceable, but each affords you a different look.
Clear wood is free of defects, though it may have minor imperfections
Select wood is almost clear, but contains some natural characteristics such as knots and color variations.
Common wood has more natural characteristics than either clear or select grades. No. 1 common has a variegated appearance. No 2 Common is rustic in appearance.
First-grade wood has the best appearance, natural color variations, and limited character marks.
Second grade wood is variegated in appearance with varying sound wood characteristics of species.
Third grade wood is rustic in appearance allowing all wood characteristics of the species.