Question about Columbia Tower/Center

[ksmith]

Specifically, the parking garage--is it located reachable via the elevators one ses to go to the upper floors, or is it a detached garage. I have a feeling it's the former, but I need to confirm, since that will dictate whether protag takes a walk in the rain (and sees something Important) because she wants to or because she has to.

The building has a Wikipedia entry, and I even found a review of the parking garage (not kind), but no specifics about location of the garage.