|Logged in as: Public User|
In many of our projects, the contractors discover electric line or other utility running under the approach guardrail transition (AGT) posts. The locations of these utility will not allow for the new posts to be installed in accordance to our design standards for the AGT. Right now, we have a construction detail CD-609-11 for the guardrail attachment to a 8" sidewalk. We usually use this detail when there are underground utilities that prevent the posts from meeting the required embedment length along the normal section of the MGS. Can this construction detail be used along the AGT where there are underground utilities? For this kind of attachment to the 8" sidewalk, the required post size is W6x20 (see attached file). Thank you for your help.
|Date||September 27, 2018|
|Response||In theory, this type of a post connection could work within an approach guardrail transition. However, to my knowledge, this type of system has never been evaluated and there are questions related to multiple features within this system, as detailed below.
As noted above, changes to the post size, the post anchorage, blockout shapes, and adding a curb are significant changes to the guardrail transition that may have huge effects on its performance. Therefore, I would recommend that this type of a system be analyzed and evaluated prior to implementing it.
|Date||October 23, 2018|
130 Whittier Research Center
2200 Vine Street
Lincoln, NE 68583-0853
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.