What 393.102C means in plain language
Tiedowns—the chains, straps, webbing, or other devices you use to secure cargo to your trailer—have rated working load limits. These limits are engineering specifications set by the manufacturer and must appear on the tiedown itself. When you load cargo, the combined weight and force distribution on any single tiedown cannot exceed its rated capacity.
This isn't about gross vehicle weight rating or total trailer load. It's specifically about whether each individual tiedown device can handle the stress you're putting on it. If an inspector finds that a tiedown is rated for, say, 5,000 pounds of tension but you've secured a load in a way that forces 7,000 pounds through it, that's a violation of 393.102C.
The regulation exists because exceeding tiedown limits can cause sudden cargo shift, equipment failure, or loss of load during transit—all catastrophic events on a highway.
What our enforcement data actually shows
Across our 13 million+ inspection records, 393.102C is uncommon. All-time, we've recorded just 12 citations for exceeding tiedown working load limits. In the last 12 months, that number dropped to 4 citations, and in the last 90 days, we've seen zero citations for this code.
When inspectors do cite this violation, the stakes are high. Our data shows a 33.3% out-of-service rate for 393.102C—meaning roughly one in three drivers cited for this code had their vehicle placed out of service immediately. This is slightly higher than the all-FMCSR average of 31.4%, indicating that inspectors view tiedown failures as a genuine safety risk warranting roadside removal from service at above-average frequency.
Nationally, 393.102C ranks #2132 of 3,036 FMCSR codes by total citation volume. The rarity of citations suggests that most drivers and fleets are securing loads correctly, but when this violation does occur, it's treated seriously.
Who gets cited most
Our inspection records do not identify citations by state in the data provided. However, we can note that across all citations, Freightliner vehicles (FRHT) account for 7 of the 12 all-time citations, followed by unknown makes (UNK) at 6 citations. Peterbilt (PTRB) appears twice.
Among carriers, TBC TRUCKING CORP (USDOT 1468692) shows 6 citations for this code—the highest count in our database. The remaining citations are distributed singly across six other carriers: Smith Leasing Co LLC, Mangum's Inc, Three Bars LLC, Freeman The Treeman LLC, Fulks Helicopter Services LLC, and HS Express LLC. Our data shows fleets such as TBC Trucking with multiple citations, suggesting that tiedown-limit violations may cluster when cargo-securing practices need review.
How severe is this compared to similar codes
Within the vehicle maintenance category, 393.102C occupies a narrow enforcement niche. For context:
393.9(a) — Inoperable required lamps generates far higher citation volume (660,737 all-time) but a lower out-of-service rate of 15.4%. Lamp defects are common; tiedown failures are rare but more frequently result in OOS placement.
396.3(a)(1) — Inspection/repair/maintenance (general) accounts for 236,919 citations with a 45.3% OOS rate—well above 393.102C's 33.3%. This broader maintenance code appears to trigger out-of-service decisions more often, likely because general inspection failures can cascade across multiple systems.
393.47E — Slack adjuster defective shows 180,363 citations but a 0.0% OOS rate. Slack adjusters are critical brake components, yet inspectors cite them without removal from service; by contrast, tiedown failures prompt OOS at one-third of cases, underscoring the acute safety concern inspectors perceive in cargo securement lapses.
How to avoid it
Tiedown working load limits are printed on each device. Before loading, build a habit around three steps:
-
Read and record tiedown ratings. During pre-trip, visually inspect each chain, strap, or binder on your trailer. Locate the manufacturer's label or stamped rating. Document the working load limit for each device. If a rating is illegible or missing, do not use that tiedown; report it to maintenance immediately.
-
Calculate and distribute load forces. Don't eyeball it. Understand that when you secure a heavy or unbalanced load, the force on one side of the trailer may be unequal. If your load shifts even slightly in transit, tiedown tension spikes. Spread weight evenly and use multiple tiedowns on heavy cargo so no single device bears more than its rated load under normal and emergency conditions.
-
Inspect tiedowns for damage before each use. Rust, bending, cracked welds, and corrosion reduce effective working load. A chain rated at 5,000 pounds that has corrosion pitting may safely hold only 3,500 pounds. Replace damaged equipment before it becomes a roadside citation and potential safety incident.
-
Know your cargo density and weight. Palletized freight, steel coils, and flatbed loads require different securement approaches. Understand how your load's weight distribution affects tiedown stress under acceleration, braking, and cornering.
The rarity of this citation in our data means the majority of drivers get it right. Staying out of the 33.3% out-of-service group requires intentional pre-trip attention to your equipment and deliberate, calculated load securement—not guesswork.