PS 2-10 Performance Standard for Wood-Based Structural Use Panels. This is another voluntary standard initiated by APA, under Commerce Department procedures. The reference to PS 2-10 in the grade stamp indicates the product meets the requirements of the standard.
PS 1-09, written in 2010, primarily addressed plywood, while PS 2-10, written in 2011, has a broader focus and covers structural plywood, OSB and other mat-formed panels, as well as composite panels. The standard classifies panels by bond (adhesive), span rating, performance category and grade. It also specifies required product test methods and quality certification programs.