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Title: Nondestructive evaluation of timber highway guardrail posts

Source: In: Proceedings of the 11th world conference on timber engineering, 201 0 June 20-24. Riva Del Garda, Italy. Ariio Ceccotti and Jan Willem van de Kuilen, eds. (CD only, without page numbers). 2010

Author(s)Wacker, James P.; Wang, Xiping; Kretschmann, David E.; Rammer, Douglas R.

Publication Year: 2010  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4714-3A

Abstract: Timber post guardrail systems have been utilized in several regions of the U.S. due to their beneficial energy absorbing characteristics during vehicle impacts. These posts are not routinely inspected and replacement decisions are rather arbitrary. The Federal Highway Administration recently placed emphasis on new asset management strategies that actively assess condition of all highway structures. This paper describes a project aimed to develop inspection protocols for embedded timber guardrail post systems. Pulse-echo acoustic techniques were utilized to measure the soundness of the embedded portion of several timber guardrail posts. Field tests were conducted on both retired and new posts in-service. Laboratory tests for cantilevered post strength were also conducted on salvaged posts after removal from service. The preliminary results indicate that pulse-echo acoustic testing shows potential as an effective nondestructive method of inspecting guardrail post in-service.

Keywords: Roads; guard fences; inspection; wood poles; testing; red pine; utilization; white pine; nondestructive testing; poles; posts; small timbers; smallwood; small diameter timber; guardrails; roundwood;pulse-echo; acoustic

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 462 kb(s)

Date posted: 05/16/2011

This publication is also viewable on Treesearch:  view
RITS Product ID: 36157
Current FPL Scientists associated with this product (listed alphabetically)
Kretschmann, David E.
Research General Engineer
Rammer, Douglas R.
Research General Engineer
Wacker, James P.
Research General Engineer
Wang, Xiping
Research Forest Products Technologist

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