The equipment the outgoing tenant left, and whose problem it becomes.
On a tenant improvement the old occupant clears their furniture and leaves the computers. Then it's the GC's problem, on the GC's schedule, and the demo crew won't touch anything with a hard drive in it because nobody wants to be the one who threw away a patient record.
Deselt has been a drywall and framing subcontractor on Treasure Coast commercial jobs since 2004. We've been standing in those buildings for twenty years. That means we understand that "Thursday" means before the inspector, that the freight elevator is booked, that the super needs a COI on file before anyone's tools cross the threshold, and that a three-day delay on a punch item costs more than the removal does.
Sometimes the tenant is gone and unreachable and there's a server nobody will authorise anyone to touch. That's a legal question about abandoned property, not a hauling question, and the answer depends on the lease. We'll hold the equipment and document it rather than guess - but get the owner's counsel involved rather than taking our word for it.