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We had a contractor forget to place the bars that tie the end-section to the shoulder.  The bars that were forgotten are 5c1 and 5c10 in the attached drawing.  They are wanting to drill and epoxy these bars in.  Is this method a suitable substation?  I realize that drilling and epoxy is acceptable industry standard.  My concern is the limited development length.  The shoulder is 12” thick, so we can get 10” embedment.  (I am not a structural engineer)  My personal feeling is that 10” embedment @ 9” o.c. would not be enough to hold the end-section in place.  If you could share your thoughts that would be appreciated.

We previous did a study for Wisconsin where we were able to fully develop no. 5 bars with only 5 ¼” embedment.

https://mwrsf.unl.edu/researchhub/files/Report14/TRP-03-264-12.pdf

The results from this research would suggest that 10” embedment with your no. 5 bars should be able to fully develop the bars.

Let me know if you have further questions.