Have you ever looked at the stamp on your OSB or plywood and wondered “What’s this for?” Well, wonder no longer!

08.15 APA Stamp1. Panel grade

2. Span rating

4. Bond classification

5. Mill thickness

6. Mill number

7. Product standard

8. APA’s performance rated panel standard

9. Performance Category

12. HUD recognition

16. Panel face orientation indicator

If you’d like more information on each of the above terms, check out the APA site at www.apawood.org/apa-trademark.