The part people underestimate
Reinstallation is not reassembly. Racking that has been dismantled and re-erected is, structurally, a new installation: different floor, possibly different configuration, definitely different bolt-down, and components that have been handled twice more than the manufacturer assumed.
That is why a move is one of the clearest triggers for a fresh look by a competent person, regardless of where the annual cycle happens to sit. See racking inspection for what that involves.
And the part people forget entirely
Make-good. Most industrial leases require the tenant to return the building to its original condition, and bolted-down racking is a fixture. Removal, floor repair where the anchors were, and disposal are a real end-of-lease cost that rarely appears in the original budget.
Whether the steel is worth moving at all depends on what it is — which is a question about which racking brand you actually own and whether components are still available for it.