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Top Mounted Thrie Beam & Steel Post Bridge Rail

Question
State WI
Description Text

A guardrail to bridge rail transition was crash tested to MASH (TL-3), and is shown in eligibility letter (B-231), and has Taskforce 13 Designator (STG03a). The bridge rail is shown on the sketches in this letter (sheets 8 & 9 of sketches), and has a steel post that is top mounted to a concrete slab. The rail element attached to the post is a thrie-beam. Could you tell me if this bridge rail was ever crash tested to MASH criteria? If not, are there any plans to crash test it?

We are looking for a top mounted steel post and thrie beam bridge rail that has been crash tested to MASH criteria, that we can use to replace the old Missouri Thrie-Beam & Channel bridge rail. Are you aware of any crash testing on this type of bridge rail being done by other testing facilities?

Thanks for any assistance you can provide.

David Nelson - (WisDOT) - Bureau of Structures

Keywords
  • Approach Guardrail Transitions
  • Bridge Rails
Other Keywords none
Date September 20, 2016
Attachment b231.pdf


Response
Response At this time, MwRSF is not aware of any thrie beam bridge rail systems that have been evaluated to MASH criteria (pass or fail).  It may be a good idea to submit a problem statement concerning the evaluation of this type of system for next year's Pooled Fund Program.
Date September 26, 2016


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