Skip to Main Content
Due to a lapse in federal funding, this USDA website will not be actively updated. Once funding has been reestablished, online operations will continue.
Condition assessment of timber bridges. 2, Evaluation of several stress-wave toolsAuthor(s): Brian K. Brashaw; Robert J. Vatalaro; James P. Wacker; Robert J. Ross
Source: Gen. Tech. Rep. FPL-GTR-160. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 11 p.
Publication Series: General Technical Report (GTR)
Station: Forest Products Laboratory
View PDF (1.3 MB)
DescriptionThis study was conducted to evaluate the accuracy and reliability of several stress-wave devices widely used for locating deteriorated areas in timber bridge members. Bridge components containing different levels of natural decay were tested using various devices. The specimens were then sawn (along their length) into slabs to expose their interior condition. The interior faces of these slabs were inspected visually and with a resistance micro-drill to confirm if deterioration was present. On the basis of these tests, we conclude that all four devices evaluated in this study can successfully be used to evaluate decay. There were, however, differences in the decay thresholds and user-friendliness among the devices.
- 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.
CitationBrashaw, Brian K.; Vatalaro, Robert J.; Wacker, James P.; Ross, Robert J. 2005. Condition assessment of timber bridges. 2, Evaluation of several stress-wave tools. Gen. Tech. Rep. FPL-GTR-160. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 11 p.
KeywordsTimber, bridge, inspection, stress wave, ultrasonic, nondestructive
- Condition assessment of timber bridges. 1, Evaluation of a micro-drilling resistance tool
- Nondestructive evaluation of incipient decay in hardwood logs
- Effectiveness of Several NDE Technologies in Detecting Moisture Pockets and: Artificial Defects in Sawn Timber and Glulam
XML: View XML