If an inspector doesn't like deflection, that's not a code issue. However, if:
(a) movement of a real suggests not merely deflection, but material weakness or poor connections or inadequate structural deflection, and
(b) the design appears not to have been significantly addressed evaluated in the approved construction documents (no calculations, or inadequate details)
- then the AHJ can request a load test (performance basis), or they can request additional structural details and calcs and material specifications as evidence that the system will not fail under design load. Having received these calcs, the inspector can also request to visually inspect materials, connections, test reports, etc. for conformance to these details and calcs.
I once had a concrete parking garage project with a very poor quality concrete sub. The forms would be stripped off and we'd see voids and pockets that indicated poor vibration. The AHJ rightly requested all kinds of tests, and in the end, they made the contractor load up the deck with a bunch of swimming pools to simulate full vehicle loads.