Most states allow incidental overlap between architects and engineers; however, there are limitations and in the event of a question, the individual must show that they have adequate background, experience and expertise to practice in the overlap. Much of what I do has to do with building facades. I often get challenged in deposition that I'm practicing architecture by providing failure investigation and remediation design of the facade (usually failed stucco systems, but also includes brick and stone veneers, masonry and a variety of other facade materials. I handle both the waterproofing aspects and the structural aspects, mainly because I think they are inseparable in many cases.
If you have reason to question the structural integrity of the architect's work, you have an obligation to bring it up. Three stories and steel framing would likely be outside that overlap zone. It is common to see architects handle a single story masonry building with open web joists, but 3 stories of open steel framing can be a different ball game.