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Timber Bridge Webinar Series – Field Performance of Timber Highway Bridges: A National Study

September 30, 2014 – 10:00 am - 11:00 am




Welcome to Timber Bridge Tuesdays Sept 9th – Oct 14th!  We will be covering various topics related to timber bridge technology in a series of 6 weekly Webinars.

Join at 8 am Pacific, 9 am Mountain, 10 am Central, 11 am Eastern

This webinar will provide an overview of the recently completed National Timber Bridge Inspection Study jointly administered by the Forest Products Laboratory (FPL) and Federal Highway Administration (FHWA).  The overall aim of this first-of-its-kind effort was to estimate the service life of timber highway bridges and their comparative durability within the various climate zones within the U.S. A description of timber bridge superstructure types and locations as well as the field inspection protocol employed by all inspectors is also provided.  Inspection results will be presented for the 132 bridges included, by climate zone and by superstructure type, and solutions to common deterioration issues will be highlighted.

Speaker Bio

James P. Wacker, PE

Research Engineer, Forest Products Laboratory

James studied Civil and Environmental Engineering at the University of Wisconsin-Madison and has been a researcher with the USDA Forest Products Laboratory for 22 years. His past research focused on the field inspection and field monitoring of timber highway bridges. His current research focuses on the development of new technologies needed for the structural health monitoring of glulam timber bridges. He has authored more than 60 publications on the subject.

Brian K. Brashaw

Brian K. Brashaw is a Director of the Wood Materials and Engineering Program with the University of Minnesota Duluth, Natural Resources Research Institute. He is a Project Leader of the Nondestructive Evaluation (NDE) research efforts at the Natural Resources Research Institute (NRRI) and is a coordinator of the NRRI Physical and Mechanical Testing Laboratory. He has developed and conducted projects with wood materials emphasizing applied product development and technology transfer.  His current NDE research focus areas include, among others, NDE development and implementation for timber bridges.  Brian holds a BS degree (Forestry) from the University of Wisconsin Stevens Point, a MS (Materials Science and Engineering) from Washington State University and is a PhD candidate in Forest Products at Mississippi State University.

Click here to download the presentation.

WoodWorks is an approved AIA provider. Eligible attendees will qualify for 1 credit (HSW).

Engineers and non-member architects will receive a certificate of completion for 1 PDH credit.

Certificates will be emailed to participants within two weeks of the webinar.


If you are attending the webinar as a group, each person in your group requiring a certificate of attendance must sign the Group Sign-in form.

  • Download and print ONE sign-in sheet for your group.
  • Return the completed sign-in form by email within 72 hours to .
  • WoodWorks will send each attendee a certificate of completion within 2 weeks.

PC-based attendees

Required: Windows® 7, Vista, XP or 2003 Server

Macintosh®-based attendees

Required: Mac OS® X 10.5 or newer

Mobile attendees

Required: iPhone®/iPad®/Android™ smartphone or tablet


30 September 2014
10:00 am - 11:00 am
Event Category:

WoodWorks offers a wide range of in-person and online training opportunities, from Wood Design Symposiums that include concurrent seminars and a trade show, to half-day workshops, lunchtime seminars and webinars.