US Standards for Wood-Based Panels US Standards for APA Trademarked Panels There are two product standards covering the manufacture of US wood-based panel products: US Voluntary Product Standard PS1-19.US Product Standard PS2-18.APA-trademarked plywood panels are covered by PS 1-19 and PS 2-18.APA OSB panels are manufactured to US PS 2-18. For more technical information on APA products, click here. APA also has its own Performance-Rated Panel Standard – PRP 108. This …
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