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Beam Guard Posts Embedment Tolerance

Question
State	WI
Description Text	Our material people have been looking into using sound waves to check post depth. I don't think it is going as well as they like. We have told them they need to be accurate with 3". I think your Q/A indicates that the difference should be 2" Thanks for your input.

System Performance Evaluation

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Road Closure Gates
Thrie Beam Guardrails

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Date January 2, 2019
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Response
Response (active)	The guidance you are referring to for post depth was provided to Wyoming. https://mwrsf-qa.unl.edu/view.php?id=1226 For wood posts, we would likely recommend keeping that post tolerance at the 2" limit. Doing so limits the variation in the post soil response to around 10%. Variation of soil depth more that this could cause increased wood post fracture and more drastic effects on the barrier performance. This may be even more of an issue for WisDOT when white pine posts are potentially used. Thanks

Response

Response
(active)

The guidance you are referring to for post depth was provided to Wyoming.

https://mwrsf-qa.unl.edu/view.php?id=1226

For wood posts, we would likely recommend keeping that post tolerance at the 2" limit. Doing so limits the variation in the post soil response to around 10%. Variation of soil depth more that this could cause increased wood post fracture and more drastic effects on the barrier performance. This may be even more of an issue for WisDOT when white pine posts are potentially used.

Thanks

Date January 2, 2019
Previous Views (138) Favorites (0)