APA plywood is manufactured to two US product standards:
This APA standard is a performance standard that is very similar to US PS 2-10. The notation on the plywood panel may therefore refer to either standard or both of them. The designation indicates the panel was manufactured to meet the standard’s performance requirements.
Performance standards do not prescribe the means of panel production. They are make sure that the panel will satisfy the requirements for a particular end use application, similar to the performance-based approach taken by European Standards.
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