United States Department of Transportation
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Inspection of Bridge Timber Piling: Operations and Analysis Manual
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1989-07-01
[PDF-568.81 KB]
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Abstract:A non-destructive method for determining the in-place strength of bridge timber piling above and below water, developed under the Maryland Highway Planning and Research Program, is presented. It is an ultrasonic wave propagation method in which the in-place strength (load carrying capacity) of a timber pile is correlated to the pile's wave velocity normal to the grain, and to its in-place unit weight. This manual covers the information an inspector needs for field testing, as well as the information needed by engineers in the office for analysis and data interpretation. The manual includes a description of the equipment and instructions for its use. The kinds of data to be collected as well as data collection procedures are covered. This is followed by instructions for data analysis, accompanied by all figures needed for data interpretation. To ensure quality of performance, the factors that contribute to the repeatability and consistency of the results are presented. Factors that might cause inaccuracies in the results are also highlighted. The conditions under which the method can be used, its limitations, as well as any potential problems involving its use are also presented.
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