Here is the most important thing to remember: a salvage concrete mixer drum roller is an overpack drum, but an overpack concrete mixer drum roller can not be a salvage drum. Still confused? Let me explain better.
According to the US Department of Transportation, 49 CFR 171.8 and overpack is "an enclosure that is used by a single consignor to provide protection or convenience in handling of a package or to consolidate two or more packages. Overpack does not include a transport vehicle, freight container, or aircraft unit load device."
