Official US Government Icon

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site.

Secure Site Icon

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

The latest information on the Coronavirus Disease 2019 (COVID-19) is available on coronavirus.gov.

United States Department of Transportation United States Department of Transportation

Guidelines for Structural Evaluation of Cargo Tank Rollover Devices

Discusses important points to consider when designing rollover protection devices for cargo tanks with diagrams and calculations.

Last updated: Wednesday, November 5, 2014