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• • <br /> R317.1.1 Field Treatment <br /> Field-cut ends, notches and drilled holes of preservative-treated wood shall be treated in the field in <br /> accordance with AWPA M4. <br /> R317.1.4 Wood Columns <br /> Wood columns shall be approved wood of natural decay resistance or approved pressure-preservative- <br /> treated wood. <br /> Exceptions: <br /> Columns exposed to the weather or in basements where supported by concrete piers or metal pedestals <br /> projecting 1 inch (25 mm) above a concrete floor or 6 inches(152 mm) above exposed earth and the <br /> earth is covered by an approved impervious moisture barrier. <br /> R317.3.3 Fasteners for Fire-Retardant-Treated Wood Used in Exterior Applications or Wet or Damp <br /> Locations <br /> Fasteners, including nuts and washers,for fire-retardant-treated wood used in exterior applications or <br /> wet or damp locations shall be of hot-dipped,zinc-coated galvanized steel,stainless steel,silicon bronze <br /> or copper. Fasteners other than nails, staples and timber rivets shall be permitted to be of mechanically <br /> deposited zinc-coated steel with coating weights in accordance with ASTM B695,Class 55 minimum. <br /> R ilEv qED FOR .E M: j <br />