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    Recent studies on the effects of chromated copper arsenate (CCA) treatment on lumber design properties have primarily evaluated the effects of such treatment at or near 12% moisture content and at failure times of 1 to 10 min. The influence of various moisture contents and faster loading rates is unknown. This report discusses the influence of moisture content and its interaction with time-to failure on the bending strength of CCA- treated (0.4 lb/ft 3 (6.4 kg/m 3 )) lumber. The factors studied were moisture contents of 10, 15, and ³23% (green lumber) and ramp-load failure times in bending of 3-6, 30-60, and 300-600 seconds. This research concluded that a revised wet-use service factor for No. 1 and better waterborne-preservative-treated lumber is needed.

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    Winandy, Jerrold E. 1995. Effect of moisture content on strength of CCA-treated lumber. Wood and fiber science. Vol. 27, no. 2 (1995): Pages 168-177


    CCA, preservative, treatment, mechanical properties, moisture content, short-term load durations

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