Logged in as: Public User

Steel backed timber transition to rigid barrier

State WI
Description Text

Does MwRSF have access to the crash test of the Steel Backed Timber Guardrail transtion to a straight stone masonary guardwall parapat- TL-3?

This transition is listed in FHWA memorandum HSA-10/B-64D2.

Also in the same memo they show a 70 foot radius installation of the steel-backed timber guardrail circular curves 70-ft radius and below.  Considering how the short radius system had problems is this design viable?

Does MwRSF have an option about the steel backed timber guardrail transition?



  • Approach Guardrail Transitions
  • Guardrail
Other Keywords steel backed timber
Date April 25, 2012


I have found a few reports documenting the full-scale testing on the steel-backed timber guardrail and transition designs (tested at TII). Please see the attached files. Note, only hte succesfull tests are contained in the reports. Thus, the TL-3 test of the transition to masonry wall is not contained in these reports. I'm not sure that a formal report was ever created for that test.

Further, I cannot find any documented analysis or testing that illustrates the crashworthyness of the steel-backed timber guardrail installed with a tight radius. As such, I
further evaluation of the noted short radius system (as small as 70 ft) before
I could recommend installing it.

Date May 3, 2012
Attachment steel backed timber guardrail.pdf

Contact Us:
130 Whittier Research Center
2200 Vine Street
Lincoln, NE 68583-0853
(402) 472-0965
Email: mwrsf@unl.edu
The information contained on the Midwest Roadside Safety Facility (MwRSF) website is subject to change without prior notice. The University of Nebraska and the MwRSF is not responsible or liable, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with the use or misuse of or reliance upon any such content, goods, or services available on this site.