When is a 'DANGEROUS' placard used?

A 'DANGEROUS' placard is used when two or more hazard classes combine to total 1,001 lbs or more. This placard serves as a general warning to indicate that a shipment contains multiple hazardous materials, which may pose various risks. The use of this placard is essential for emergency responders and others to understand the potential hazards involved, allowing for appropriate precautions to be taken during transport and in case of an incident.

The significance of this placard lies in its ability to convey that the materials may not fit neatly into a single hazard category but collectively present a greater risk due to their combined weight. This is especially important in situations where the characteristics of different hazards could interact or contribute to overall danger during transport.

Transporting explosive materials, more than 1,000 lbs of any one hazard class, or only flammable solids does not necessitate the use of a 'DANGEROUS' placard, as these scenarios are addressed by specific placards designated for each hazard category, reflecting the specific risks associated with those materials.