Overpacks

An overpack is an enclosure that is used by a single consignor to provide protection or convenience in the handling of a package. Overpacks are not packages. They may consolidate two or more packages that could, under normal conditions, be offered and transported individually.

Overpacks must be marked with the proper shipping name and ID number of each material contained and labeled for each material contained. If all relevant inner package markings and labels are visible, however, overpack marking and labeling may be omitted.

If UN standard packagings are required, the overpack must be marked with the word "OVERPACK," unless the specification markings on the inside packages are visible. If the packages inside the overpack are required to be packed with closures upward, the overpack must be marked with orientation arrows on two opposite vertical sides of the overpack.

Overpacks may not be used for packages containing Class 8 (corrosive) materials, PG I, or Division 5.1 (oxidizing) materials, PG I, with any other hazardous materials.

"Poison" or "toxic" hazardous materials may be transported in the same vehicle with foodstuffs, feed, or any edible material intended for human or animal consumption if the hazardous material has been marked, labeled, packaged, and overpacked in accordance with the Hazardous Materials Regulations.

To learn more about Multimodal Shipping visit our Multimodal DOT, IATA & IMDG HAZMAT Shipping Online Training web page.