What 173.30 means in plain language
FMCSR 173.30 addresses the responsibility of shippers—the companies that pack and prepare hazardous materials for transport—to load those materials correctly before they reach your truck. The regulation sets standards for how hazardous cargo must be assembled, blocked, braced, and prepared so that it arrives at your dock safe and compliant.
When you get cited for 173.30, the inspector has identified evidence that hazmat was not loaded or prepared properly before you picked it up. This is distinct from how you handled or secured the load during transport. The violation flags a breakdown at the shipper's end—but the citation may still land on you at roadside, because ultimately you're responsible for inspecting and refusing obviously unsafe loads.
The key takeaway: you cannot prevent a shipper from loading badly, but you can and must inspect before accepting cargo. If something looks wrong—loose containers, crushed packaging, leaking seals, improper blocking—you have the right and responsibility to refuse the load or demand it be reloaded correctly.
What our enforcement data actually shows
Across our 13 million+ roadside inspection records, 173.30 is rarely cited. All-time, we show 56 citations for this code, ranking it #1595 out of 3,036 FMCSR codes by volume. In the last 12 months, only 1 citation appeared in our database, and none in the last 90 days.
Of the 56 all-time citations, 9 resulted in an out-of-service placement (16.1% OOS rate). This is substantially lower than the all-FMCSR average of 31.4%, which means inspectors generally do not escalate 173.30 violations to roadside removal. This pattern suggests that when 173.30 shows up, it's often a documented deficiency rather than an immediate safety threat warranting truck impoundment.
The sparse recent activity—just 1 citation in the past year—indicates that 173.30 violations are uncommon in modern enforcement. This may reflect either better shipper compliance, inconsistent inspector focus on pre-pickup loading standards, or the fact that most loading problems are caught and corrected before they reach roadside.
Who gets cited most
Our enforcement data shows that in the last 180 days, Texas accounted for 1 citation with a 0.0% out-of-service rate. The extremely limited citation volume across states over this period means geographic trends are not reliable.
Among carriers with multiple all-time citations, SAFE TRANSPORT LLC (USDOT 2485172) appears in our records with 3 citations for 173.30. AN ENTERPRISE INC (USDOT 1750906), US XPRESS INC (USDOT 303024), and ACE TRANSPORTATION INC (USDOT 3396641) each show 2 citations. Across the remaining citations, carriers including ESTES EXPRESS LINES, TA DEDICATED INC, CONTRACT FREIGHTERS INC, MID STATE SYSTEMS INC, J B HUNT TRANSPORT SERVICES INC, and USA TRUCK LLC each account for 1 citation. These patterns reflect the rarity of the violation; no single carrier or region shows a concentrated problem.
How severe is this compared to similar codes
Hazmat loading and handling violations exist across a spectrum of severity in the FMCSR. Our data shows the contrast clearly.
General loading/unloading hazmat violations—codes 177.834A-HMC and 177.834(a)—are far more commonly cited, with 3,954 and 3,839 citations respectively, and both carry extremely high out-of-service rates (99.2% and 97.9%). These codes address deficiencies in how you handle hazmat during transport, not the initial packaging by the shipper.
Placarding violations (177.817(a)) account for 2,274 citations with a 75.1% OOS rate, reflecting their seriousness: improper or missing placards prevent first responders from identifying hazmat in an emergency.
By contrast, 173.30's 16.1% OOS rate and 56 all-time citations place it near the bottom of hazmat enforcement severity. Shipper-side loading issues are rarer in roadside inspection data, and when found, they typically do not trigger immediate removal.
How to avoid it
Because 173.30 violations originate with the shipper, your defense is a rigorous pre-acceptance inspection:
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Before arriving at the shipper or distribution center, review the bill of lading and shipping papers to confirm the hazmat class, proper shipping name, and any special handling notes. Mismatch between what's promised and what's delivered is your first red flag.
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Inspect the exterior of all packages, pallets, and containers before they leave the dock. Look for crushed corners, dented drums, cracked plastic, leaking seals, tape that's loose or peeling, or obvious damage to blocking and bracing material. Do not accept loads that show these defects; ask the shipper to repackage or replace them on the spot.
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Verify that packages are properly stacked and secured within the trailer. Hazmat must be blocked and braced so that it cannot shift during transit. Loose or tumbling containers are a sign the load was not prepared to standard.
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Check that hazmat is segregated from incompatible cargo per the shipper's documented hazmat compatibility matrix. Certain classes cannot be transported together; if you see mixed loads without clear separation, question the shipper before departure.
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Confirm that all placarding, labeling, and markings are present and legible on every package. Even if the shipper packed the contents correctly, missing or obscured labels can trigger citations downline.
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Document your inspection. Take photos of any concerns, note them on the manifest, and get shipper acknowledgment if you refuse or request correction. This creates a paper trail if a violation later appears at roadside.
The rarity of 173.30 citations in our database suggests that most drivers and shippers are already handling this correctly. Your strongest protection is the pre-trip mindset: inspect first, refuse unsafe loads, and document what you see.