FIRST. AGAIN. UL Design No. V314, the first ASTM E119 (UL 263) fire-retardant-treated lumber and plywood 2-Hour bearing wall assembly. UL System No. EWS0045, the first and only fireretardant-treated lumber and plywood exterior wall system complying with NFPA 285. Improving Wood Since 1955 Based on UL Design No. V314, UL System No. EWS0045 requires UL Classified Pyro-Guard® fire-retardant-treated lumber and plywood. TECWOOD@FRTW.COM VISIT US AT NFPA BOOTH 925 TECHNICAL ASSISTANCE: 1-800-TEC-WOOD