Loading, Unloading & Segregation
18 free questions, part of the Hazmat (H) Endorsement CDL practice test
The hazmat segregation table at 49 CFR 177.848 tells you which hazard classes can never ride in the same vehicle, which ones need distance or a barrier between them, and which materials have their own Class 1 compatibility rules. ELDT.io's free bank has 18 questions on the segregation table along with the loading, blocking, and bracing requirements that go with it.
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What does an X mean on the hazmat segregation table?
An X means those two hazard classes are forbidden from being loaded, transported, or stored together in the same vehicle, no exceptions for distance or separation.
Can I ever load cyanide and acids together if I keep them far enough apart?
No. Under 49 CFR 177.848(c), cyanides and acids are absolutely forbidden from sharing a vehicle regardless of distance, even in situations where the general table would otherwise allow a lesser separation.