Under 1,001 Pounds, Except for the Pail Nobody Counted
It is 06:40 at a Livonia, Michigan shipper and you are about to close the doors on a 53-foot dry van. The load plan reads: 12 steel pails of UN 1402, Calcium carbide, 4.3, PG II, 25 lb gross each; and 18 five-gallon pails of UN 1263, Paint, 3, PG II, 50 lb gross each. The dock supervisor hands you a shipping paper that lists both entries correctly and says, 'We never placard this run. It is under a thousand pounds, so we are exempt.' The supervisor offers to add six more paint pails (300 lb) if you can take them today, and asks whether he can just slap one DANGEROUS placard on the back and skip the rest. Your dispatcher wants you rolling in ten minutes and the consignee's dock closes at 15:00.
1. As the van sits right now (12 pails of carbide, 18 pails of paint), which placards are required, and is the supervisor's thousand-pound reasoning correct?
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No, and it is only half right for one of the two materials.
Placarding does not turn on total shipment weight; it turns on which table of the placarding rules a material falls in.
- Calcium carbide, 4.3, is a Table 1 material. Table 1 hazards must be placarded for any quantity - there is no weight threshold. So the van needs a DANGEROUS WHEN WET placard before it moves.
- Paint, 3, PG II, is Table 2. Table 2 hazards may go unplacarded only while the aggregate gross weight of all Table 2 hazmat aboard is under 1,001 lb. Here 18 x 50 lb = 900 lb, so no FLAMMABLE placard is required today.
Two traps the supervisor fell into:
- The 1,001 lb test uses gross weight (product plus packaging) and is counted across all Table 2 materials on the vehicle, not one class at a time. Adding one unrelated Table 2 drum of another class can push you over the line.
- The exemption is only for Table 2. It never touches a Table 1 material, however light the package.
Practical answer: four DANGEROUS WHEN WET placards (both sides, front and rear), displayed and legible, before you leave the yard. Taking a 25 lb pail of carbide off the tailgate does not remove the obligation.
2. If the supervisor adds the six extra paint pails, what changes, and can a single DANGEROUS placard replace the rest?
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What changes: paint becomes 24 x 50 lb = 1,200 lb, which is at or above 1,001 lb of Table 2 material, so a FLAMMABLE placard (or an authorized substitute) is now required for the Class 3 load. Nothing about the carbide changes - it was already placarded at any quantity.
Can DANGEROUS replace the rest? Partly. The DANGEROUS placard is a permitted substitute for the placards of Table 2 hazard classes when the 1,001 lb threshold is met. It cannot substitute for a Table 1 placard. So the correct outcome is:
- DANGEROUS (in lieu of FLAMMABLE) for the paint, plus
- DANGEROUS WHEN WET for the carbide, still displayed.
If the supervisor wants to use FLAMMABLE and DANGEROUS WHEN WET as separate placards, that is equally legal and arguably clearer to responders.
Reasoning to carry to the exam: substituting DANGEROUS is a convenience for stacking multiple Table 2 classes, not a wildcard that wipes the board. A vehicle carrying a Table 1 material is never fully covered by a DANGEROUS placard. Also confirm the placards are on all four sides of the van - a single rear placard is not compliant - and that they are on before the first wheel touches a public road.
3. The supervisor says the shipper is not responsible for placards and refuses to supply them. What is the correct division of duty, and what do you do?
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Both parties have a duty, and they are different duties. The offeror (shipper) must furnish the required placards to the motor carrier. The motor carrier must affix them to the vehicle. So 'we do not placard, that is your job' and 'we do not stock placards' are both wrong answers - the shipper owes you the placards, and your company owes the public a properly placarded van.
What to do on the dock:
- Do not depart unplacarded. An unplacarded Table 1 load is a violation that follows you for the entire trip and survives every scale and roadside inspection. It is also the single thing a firefighter needs to see from 50 feet away.
- Ask for the placards in writing on the shipping paper or a dock receipt - a note that placards were requested and refused protects you and forces the conversation upward.
- Call your dispatcher/safety contact immediately. This is a carrier decision, not a driver improvisation. Your company may legally supply its own placards from truck stock and sort out the cost later.
- Only refuse the load if the placarding cannot be made compliant before departure. Refusing to move is the last resort, not the first.
Do not hand-write a placard, tape paper to the door, or use a placard for the wrong class. A wrong placard is worse than none because it sends responders to the wrong playbook.