What 393.106(b) means in plain language
When you're hauling cargo, federal rules require your truck to have a structure at the front end—called a headerboard or bulkhead—that keeps freight from sliding forward into the cab during braking, sharp turns, or sudden stops. This barrier protects both your cargo and you.
A 393.106(b) citation means an inspector found that your headerboard or bulkhead was either missing entirely or not adequate for the type of load you were carrying. "Inadequate" typically means it was damaged, too short, had gaps, or wasn't strong enough to restrain the cargo properly. The requirement applies whenever your cargo could move forward and create a safety hazard.
This is a structural securement issue, not a documentation problem. The inspector can see it during a walk-around inspection, and there's no gray area—either the structure is there and serviceable, or it isn't.
What our enforcement data actually shows
Across our 13 million+ inspection records, 393.106(b) has generated 1,541 all-time citations and ranks #596 out of 3,036 FMCSR codes by citation volume. Over the last 12 months and last 90 days, we recorded zero citations for this code, which suggests either very high compliance or a shift in enforcement focus.
What stands out most: our data shows an out-of-service rate of 80.1% for 393.106(b). That means in 1,235 out of 1,541 cases, inspectors did not allow the truck to continue operating—they placed it out of service until the headerboard was fixed or the load was rearranged. This rate is dramatically higher than the all-FMCSR average of 31.4%, making 393.106(b) a violation that inspectors treat as an immediate safety stop in the vast majority of cases.
The high OOS rate reflects the severity: a missing or failed front-end barrier puts both driver safety and public safety at direct risk during any sudden deceleration.
Who gets cited most
Our inspection records show that top carriers cited for 393.106(b) include fleets such as Siteone Landscape Supply LLC with 5 citations and Lowe's Home Centers LLC, Rod Rottinghaus Farms, Twisted Oak Landscape and Design LLC, Old Dominion Freight Line Inc, Western Express Inc, and American Builders & Contractors Supply Co Inc, each with 4 citations. These numbers reflect carriers operating over extended periods with diverse fleets; they do not indicate systematic negligence, but rather the statistical likelihood that larger or specialized fleets encounter this violation.
Among vehicle makes, we see Ford and Freightliner leading with 86 and 85 citations respectively, followed by International, Kenworth, and Utility-brand trailers. This distribution reflects which trucks are most common on the road, not necessarily a defect in any brand.
How severe is this compared to similar codes
393.106(b) sits in the Vehicle Maintenance category. When you compare it to similar cargo and structural securement violations, the severity picture is clear:
- 393.9(a) (Inoperable required lamps) has 660,737 citations but only a 15.4% OOS rate. Lighting can often be corrected with a simple bulb replacement or minor wiring fix; inspectors place trucks out of service far less often.
- 396.3(a)(1) (Inspection/repair/maintenance – general) has 236,919 citations with a 45.3% OOS rate. This is broader and includes items of varying urgency.
- 393.78 (Windshield condition defective) has 157,894 citations but only a 0.3% OOS rate. A cracked windshield is a safety issue but usually doesn't prevent operation.
By contrast, 393.106(b)'s 80.1% OOS rate shows that inspectors view a missing or inadequate headerboard as a critical structural failure that must be resolved before the truck rolls again. The cargo itself becomes a hazard if the front barrier fails.
How to avoid it
Before each trip:
- Walk around and inspect your headerboard or bulkhead. Look for visible damage, cracks, bent frame members, or any separation from the trailer body. If you haul loose or shifting cargo (gravel, mulch, landscaping materials, retail goods), this step is essential.
- Check for gaps or missing fasteners. A headerboard that's partially detached or has large gaps is a failure waiting to happen. Tighten bolts, check welds, and replace any compromised fasteners.
- Match the barrier height and strength to your load. A short or flimsy board might be adequate for palletized freight but not for bulk material or heavy items that shift. Know your cargo and verify the structure is up to the job.
- Don't assume a borrowed or rented trailer has an adequate setup. Before accepting a load, get out and verify the front-end structure meets the requirement. If it's questionable, flag it before departure.
- Secure your load properly after verifying the headerboard is solid. A strong barrier doesn't protect if your load itself isn't tied down correctly. Both must work together.
Ford and Freightliner vehicles account for the most citations in our data, but any vehicle type can fail this standard if the headerboard is neglected. Make headerboard inspection a non-negotiable part of your pre-trip walk-around, especially if you work in landscaping, retail supply, or bulk freight.