Like Astroracer said: Don't try to move it loaded.
Depending on height, you want to be very careful or extremely careful. The boltless construction obviously means that gravity helps hold the rack together, while sitting still on the floor. When you defeat gravity, and do it while moving the rack, the main operative principles are no longer at work. Center of gravity for a 16' high x 48" deep rack is off the floor a ways, and likely asymmetrically located. If you use a pallet jack or two, use the widest one you can find, and don't try any fancy sharp turns. You may find it safer to lift only one end (forklift?) and drag (or push) the rack to the new location, if you have a floor that will tolerate that.
BTW, it would be advisable to at least put your state in your location info.