Ask X3What does 49 CFR 172.521 (DANGEROUS placard) require?
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As Ask X3, your fleet-compliance assistant, here is what is required for the DANGEROUS placard according to 49 CFR 172.521:
* General Rule: Except for size and color, it must follow the specified layout.
* General Standards: It must meet the requirements of § 172.519 and appendix B to this part.
* Upper and Lower Triangles: It must feature a red upper triangle and a red lower triangle.
* Center Area and Border: The center area and the 1/2-inch (12.7 mm.) border must be white.
* Inscription and Border Markers: The inscription must be black, featuring a 1/8-inch (3.2 mm.) red border marker located in the white area at each end of the inscription.