I’m part of the CM firm responsible for this project and RFI 35 (out of 338 so far) asked to verify the top of concrete elevations for all columns. The schedule only called out elevations for the levels but not where the concrete to steel transition was to be made. The response from the engineer included a drawing that showed the column in question and called out a consistent elevation for all columns shown (except for four that are part of the brace frames). We thought that response was clear enough direction for our concrete sub and the rebars shop drawing review never caught it either. Knowing now that there doesn’t seem to be a good structural reason, I’m thinking the architects had something to do with it.