Securing a coil isn't like chaining down a flat crate. Success depends on loading orientation, the rack or dunnage setup underneath the coil, the number and rating of your tie-downs, and strict compliance with federal cargo securement rules. Get any one of these wrong, and you're looking at a roadside violation at best, a rollout at worst.
This guide walks through exactly how to secure steel coils on a flatbed: choosing between eye-to-sky and eye-to-side loading, the equipment you need, common mistakes that lead to violations, and when it makes more sense to hand the job to a heavy haul specialist.
Key Takeaways
- Coils are secured eye-to-the-sky (flat) or eye-to-the-side (upright), depending on coil type and shipper specs
- Federal rules require tie-down assemblies rated to at least 50% of the coil's total weight, based on load orientation
- Rated coil racks, beveled dunnage, and friction mats cradle coils to prevent shifting before tie-down
- DIY securement carries real legal and safety risk, so many shippers rely on vetted heavy haul carriers who specialize in coil freight
How to Secure Steel Coils on a Flatbed
Step 1: Prepare the Trailer Deck
Before anything touches the deck, inspect it. Clear away debris, check for damage, and confirm the trailer's rated deck capacity meets or exceeds the coil's total weight.
Once the deck is clean, lay down friction mats where dunnage or racks will sit. Mats matter because unrated materials can allow dunnage to slide under braking or hard cornering, a problem that shows up fast on a scale or during a roadside check.
Step 2: Position Dunnage, Racks, or Chocks
Next, place beveled wood dunnage or steel coil racks on the mats to cradle the coil above the deck. Carriers commonly use 4x4 or 6x6 timber, and many size their rack sets to the coil's weight and width rather than eyeballing it.
For eye-to-side coils, add chocks at the outer edges. This creates a physical stop against rolling before a single strap or chain is applied.
Step 3: Load and Position the Coil
Use a crane, forklift with a coil boom, or overhead hoist to lower the coil gently onto the prepared dunnage or racks. Rushing this step is how coils end up off-center.
Before you walk away, verify:
- The coil's eye orientation matches the loading plan
- The coil sits centered with no visible tilt
- All supports make even contact — no gaps underneath
Step 4: Apply Tie-Downs and Final Checks
Now route your chains or straps according to the coil's orientation, tightening evenly to remove slack. Overtightening can crush or dent the coil's surface.
Add corner or edge protectors anywhere a strap contacts a sharp edge. Then do a full walk-around before pulling out.
One more thing that trips up a lot of drivers: federal rules require rechecking cargo securement within the first 50 miles, then again at every duty status change, after three hours, or after 150 miles, whichever comes first. Initial settling loosens straps more often than people expect.
Eye-to-the-Sky vs. Eye-to-the-Side: Choosing the Right Loading Method
The "eye" is the hollow center running through the coil. How that eye is oriented during transit determines which securement approach applies. Federal rules under 49 CFR 393.120 prescribe different tie-down patterns depending on whether the eye sits vertical, crosswise, or lengthwise.
Eye-to-the-Sky (Flat) Loading
In this method, the coil rests flat with the eye facing up. Rolling risk disappears almost entirely, but you still need a careful tie-down pattern: a single strap, an X-pattern, or a "spider" configuration for heavier coils.
This method suits coils that could deform under upright pressure, or shipments where a lower center of gravity is preferred for stability.
Eye-to-the-Side ("Shotgun" or "Suicide") Loading
Here, the coil rests on its circular edge. If the eye faces forward, drivers call it shotgun loading. If the eye faces the side or sky, it's suicide loading. Both require dunnage, racks, and chocks to stop rolling in either direction.
This orientation is common for heavier, sturdier coils and is often preferred when the receiver's unloading equipment is built for it.
Coils are never simply laid flat without support, regardless of orientation. Unsupported flat-loading risks lateral shifting and concentrates weight unevenly across the trailer frame. Elevation and cradling are required no matter which way the eye faces.
The right choice depends on a few factors:
- Coil material and its tendency to deform under pressure
- Coil weight and diameter
- Shipper or receiver equipment requirements
- Federal tie-down rules under 49 CFR 393.120
Confirm the required orientation before dispatch, not after the coil is already on the truck.
What You Need Before Hauling Steel Coils
Under-preparation causes more coil securement failures than bad technique does. A pre-trip checklist catches problems before they become violations.
Equipment Checklist
- Coil racks or beveled dunnage rated for the coil's weight
- High-friction mats, chocks, and corner/edge protectors
- Grade 70 or Grade 80 chains, or ratchet straps with adequate Working Load Limit
- Weather protection (coil bags or tarps) for moisture-sensitive coils, since exposure causes rust and rejected freight
Regulatory & Weight Considerations
Confirm the coil's exact weight and dimensions before loading so you select correctly rated equipment. Federal rules require an aggregate tie-down Working Load Limit of at least 50% of the coil's total weight. A 40,000-lb coil, for example, needs at least 20,000 lb of aggregate WLL across your securement assembly.
Meeting these requirements without dedicated coil expertise is where many shippers get stuck. Partnering with a heavy haul freight specialist like Sims Global Solutions solves this by connecting loads with carriers already equipped and experienced with coil-specific securement, cutting down on delays, damage claims, and roadside violations.
Common Mistakes to Avoid When Securing Steel Coils
Most coil incidents trace back to a handful of repeat mistakes:
- Skipping friction mats or using undersized mats, letting dunnage and racks shift under braking or turning
- Mismatched racks, using a rack that doesn't match the coil's diameter or weight, leaving it unstable
- Under-calculating tie-down capacity, falling short of the required aggregate WLL and increasing rollout risk
- Missing the recheck after the first miles of the haul, when initial settling most often loosens straps or chains
During CVSA's 2023 International Roadcheck, cargo securement accounted for 12.4% of all vehicle out-of-service violations across nearly 60,000 inspections. That's not a coil-specific number, but it shows how often securement gets flagged industry-wide.
Conclusion
Securing steel coils safely depends on choosing the correct loading orientation, using properly rated dunnage or racks with friction mats, and applying tie-downs that meet weight-based federal requirements. Most coil incidents stem from improper preparation or mismatched equipment, not the securement method itself.
Shippers who want extra assurance can work with Sims Global Solutions to connect with vetted heavy haul carriers experienced in coil and other specialized freight. Real-time tracking through SimsTrak and dedicated operations support add further peace of mind.
Frequently Asked Questions
Why aren't steel coils laid flat on flatbeds?
Laying a coil flat without dunnage or racks still risks lateral shifting and uneven weight distribution. Coils are elevated and cradled to distribute weight safely and allow proper tie-down routing.
What is a flatbed coil package?
A coil package is the full securement setup: the coil plus its dunnage/racks, friction mats, chocks, and tie-downs, arranged together to meet cargo securement regulations.
How many tie-downs are required for a steel coil?
Federal rules require an aggregate tie-down Working Load Limit of at least half the coil's total weight, applied through orientation-specific patterns rather than a flat per-weight count.
What's the difference between shotgun and suicide coil loading?
Shotgun loading has the coil's eye facing forward, while suicide loading has the eye facing the side or sky. Both fall under eye-to-side securement.
Can steel coils shift or roll if improperly secured?
Yes. Unsecured or under-secured coils can roll, shift, or fall from the trailer, and drivers are responsible under federal regulations for preventing this.
Do I need a specialized carrier to haul steel coils?
Any properly equipped flatbed carrier can technically haul coils, but specialized heavy haul carriers like Sims Global Solutions bring proven experience, rated rack inventory, and compliance expertise that reduce damage and delay risk.
