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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Interpretation Response #01-0294 ([Department of the Army] [Mr. William R. Frerichs])

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date:

Company Name: Department of the Army

Individual Name: Mr. William R. Frerichs

Location State: OK Country: US

View the Interpretation Document

Response text:

December 27, 2001


Mr. William R. Frerichs                       Reference  No. 01-0294         
Department of the Army
US Army Defense Ammunition Center
1 C Tree Road
McAlester, OK 74501-9053

Dear Mr. Frerichs:

This responds to your November 19, 2001 letter requesting additional clarification of our response letter Ref. No. 01-0280 regarding segregation requirements under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180).  Specifically, you ask whether a dromedary unit that is attached to a Heavy Expanded Mobility Tactical Truck with a Load Handling System (HEMTT-LHS), equipped with a flatrack with cargo, is considered to be a separate transport vehicle from the dromedary box.  You intend to transport incompatible explosives separated in this manner.

It is the opinion of this Office that a dromedary box loaded with explosives attached to a HEMTT-LHS that also has a flatrack loaded with explosives is considered to be one transport vehicle, and, is not acceptable for hazardous materials, including incompatible explosives, that may not be transported on the same transport vehicle under § 177.848. However, if the flatrack loaded with explosives is loaded onto a separate trailer attached to the back of the HEMTT-LHS, the combination motor vehicle is considered to be two separate transport vehicles, and is acceptable for hazardous materials that require segregation of incompatible explosives on the same transport vehicle.

I hope this additional clarification on transporting incompatible explosives is helpful.



Delmer F. Billings
Chief, Standards Development
Office of Hazardous Materials Standards


Regulation Sections

Section Subject
177.848 Segregation of hazardous materials