Ask X3What does 49 CFR 172.510 (Special placarding provisions: Rail) require?
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Based on 49 CFR 172.510, the special placarding provisions for rail require the following:
1. White Square Backgrounds: Specific placards must be placed on a white square background (as described in § 172.527) for:
* Division 1.1 and 1.2 (explosive) materials requiring EXPLOSIVES 1.1 or EXPLOSIVES 1.2 placards on the rail car.
* Division 2.3 Hazard Zone A or Division 6.1 Packing Group I Hazard Zone A materials requiring POISON GAS or POISON placards on the rail car (this includes tank cars carrying only a residue of these materials).
* Class DOT 113 tank cars used to transport Division 2.1 (flammable gas) material (including tank cars carrying only a residue of the material).
2. Chemical Ammunition: Any rail car containing Division 1.1 or 1.2 explosive ammunition that also meets the definition of a material poisonous by inhalation must be placarded with both EXPLOSIVES 1.1 or EXPLOSIVES 1.2 placards and POISON GAS or POISON INHALATION HAZARD placards.