What does 49 CFR 172.317 (KEEP AWAY FROM HEAT handling mark) require?

Short answer

49 CFR 172.317 requires a KEEP AWAY FROM HEAT handling mark on packages containing self-reactive substances of Division 4.1 or organic peroxides of Division 5.2 for transportation by aircraft. The mark must be a rectangle with specific dimensions and design elements.

The rule says

1. "Except for size, the KEEP AWAY FROM HEAT handling mark must appear"

2. "The symbol, letters and border must be black and the background white, except for the starburst which must be red." (49 CFR 172.317(c))

In plain English

This rule is about safety in transporting hazardous materials by air. The specific design and placement of this mark ensure that handlers are aware of the need to keep these materials away from heat sources. In practice, this means that anyone handling these packages must take care to avoid exposing them to excessive heat, which could come from various sources such as direct sunlight, proximity to engines, or storage near heat-emitting equipment.

What to do

• Ensure all relevant packages are marked with the KEEP AWAY FROM HEAT handling mark as specified.
• Train handlers on the importance of keeping these materials away from heat sources.
• Review transportation procedures to minimize exposure to heat during transit.
• Regularly inspect packages for any damage to the marking or the package itself that could compromise safety.