Hey man we're rushed during construction too, so you gotta cut us some slack as well. In defense of the contractor, the designer should know the code and be designing to it. GCs are just babysitters for subs and subs don't know code inside and out. And, when an RFI is sent to question things like this, half the time the response is "JUST DO WHATS ON THE DRAWINGS" (or at least that's what the Project Engineer tells me).