Here's the engineer side of motoengineer!
In NYC rebar or reinforcement bar, is inspected by either a special inspector or an engineer. Typically we look for conformance to the approved drawings, but in many cases where we are performing repair work, we have to adjust for field conditions. In this photo you'll see that most of the rebar are existing rebars that are already cast into the concrete, so moving them isn't a possibility. Instead we have to inspect to see how close to the approved drawings we can get them. This isn't ideal, but a good engineer is one that understands and adapts to field conditions!