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.
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