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ETC. AND CONCRETE OR MASONRY. <br /> PRESSURE TREATED LUMBER SHALL COMPLY WITH THE AMERICAN WOOD PROTECTION ASSOCIATION (AWPA) STANDARD U1, <br /> COMMODITY SPECIFICATION A AS INDICATED BELOW OR HAVE EQUIVALENT ICC-ES APPROVAL. <br /> PROPOSED USE AWPA USE <br /> CATEGORY <br /> RESIDENTIAL DECKS DECKING 3B <br /> JOISTS ABOVE GROUND 3B <br /> JOISTS IN CONTACT WITH 4A <br /> GROUND <br /> POSTS 4A <br /> RAILING 3B <br /> LEDGERS 3B <br /> SAWN LUMBER ABOVE GROUND 3B <br /> GROUND CONTACT 4A <br /> PLYWOOD DAMP ABOVE GROUND 2 <br /> EXTERIOR ABOVE 3B <br /> GROUND <br /> GROUND CONTACT 4A <br /> POLES ROUND 4B <br /> SAWN 3B <br /> FENCING PICKETS, SLATS, AND 3B <br /> TRIM <br /> SAWN POSTS 4A <br /> ROUND POSTS 4A <br /> RAILS 3B <br /> SILL PLATES IN CONTACT WITH 2 <br /> CONCRETE OR MASONRY <br /> INTERIOR LEDGERS IN CONTACT WITH 2 <br /> CONCRETE OR MASONRY <br /> ALL TREATED LUMBER SHALL BEAR THE QUALITY MARK OF AN ACCREDITED INSPECTION AGENCY. THE QUALITY MARK SHALL <br /> INCLUDE: <br /> A. IDENTIFICATION OF TREATING MANUFACTURER <br /> B. TYPE OF PRESERVATIVE USED <br /> C. MINIMUM PRESERVATIVE RETENTION (PCF) <br />