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    Author(s): Stan LebowBessie WoodwardPatricia Lebow
    Date: 2008
    Source: Proceedings, 104th annual meeting of the American Wood Protection Association ... Portland, Oregon, May 18-20 2008 : volume 104. Birmingham, Ala. : American Wood Protection Association, c2008: pages 85-88.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (100 KB)

    Description

    This paper compares average ratings of test stakes after 3, 4, 5, and 7 years exposure to their subsequent ratings after 11 years. Average ratings from over 200 treatment groups exposed in plots in southern Mississippi were compared to average ratings of a reference preservative. The analysis revealed that even perfect ratings after three years were not a reliable indicator of good performance after 11 years. Only 53% of the treatment groups with an average rating of 10.0 after 3 years had ratings at least as great as the reference preservative after 11 years. This percentage increased to 72% for treatment groups with an average rating of 10.0 after 4 years and 84% for treatment groups with an average rating of 10.0 after 5 years, and 100% for treatment groups with an average rating of 10.0 after 7 years. The data indicate that 3 years of exposure is not sufficient to evaluate a preservative intended for use in ground contact in high hazard areas, and that even slight evidence of vulnerability after 5 years may be a predictor of inadequate future performance.

    Publication Notes

    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Lebow, Stan; Woodward, Bessie; Lebow, Patricia. 2008. Observations on the predictive value of short-term stake tests. Proceedings, 104th annual meeting of the American Wood Protection Association ... Portland, Oregon, May 18-20 2008 : volume 104. Birmingham, Ala. : American Wood Protection Association, c2008: pages 85-88.

    Keywords

    Stake tests, ratings, test duration, wood preservatives, testing, methodology, wood deterioration, deterioration, preservative treated wood, duration, stakes, preservation, treated wood, preservatives, copper compounds, resistance to decay, exposure tests, Mississippi, field tests, stakes, decay, durability, decomposition of wood

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