Ask ten flatbedders whether chains or straps are better and you'll start an argument. The honest answer is: it depends entirely on what you're hauling.
Both chains and ratchet straps are legal, DOT-approved tiedowns. Both can secure a load safely when used correctly. But they are not interchangeable, and using the wrong one for the freight is how you damage cargo, fail an inspection, or put a load on the road. Here's how I think about it after a lot of years on a flatbed.
The heavy stuffWhy Steel Gets Chains — Every Time
When I'm hauling steel coils, plate, or structural steel, I reach for Grade 70 transport chain and binders. It isn't preference — it's the right tool. Here's why.
- Raw strength. A 3/8" Grade 70 chain carries a working load limit of 6,600 lbs. A heavy 4" ratchet strap tops out around 5,400 lbs. On a 40,000-lb coil where you're stacking WLL to hit the federal minimum, that difference adds up fast.
- It survives the real world. Steel has sharp edges, burrs, and mill oil. It gets hot in the sun. Webbing cuts on a sharp edge, abrades, and degrades in UV and heat. Chain shrugs all of that off.
- It won't quietly fail. A strap can look fine and be cut most of the way through on the back side where you can't see it. Chain damage — stretch, gouges, cracks — is out in the open where you and an inspector can catch it.
- It's what the load demands. Steel doesn't forgive. When thousands of pounds want to move, you want the strongest, most abrasion-proof tiedown you've got between that load and the road.
The other sideWhen Straps Are the Right Tool
Chains aren't the answer to everything, though. For a lot of freight, ratchet straps are the better, smarter choice — and reaching for chain on the wrong load can actually cause damage. Straps earn their keep on:
- Lumber and building products. Dimensional lumber, plywood, and packaged building materials strap well, and webbing spreads pressure across the bundle instead of biting into it.
- Crated, boxed, and palletized freight. Straps hold this kind of load firmly without the point-loading that chain and binders can crush a crate or pallet with.
- Machinery and equipment with finished surfaces. Anything painted, polished, or with body panels you don't want gouged — chain will mar it, webbing won't. (Corner and edge protectors make straps even gentler and keep the webbing off sharp corners.)
- Lighter loads where chain is overkill. Straps are faster to throw, lighter to handle, and quicker to ratchet down. On freight that doesn't need chain's strength, they save your back and your time.
Straps also give a bit of controlled stretch, which can help keep tension on a load that settles. The tradeoff is that same webbing is vulnerable — to cuts, abrasion, UV, and heat — which is exactly why it's wrong for steel and right for a crated or finished load.
At a glanceChains vs. Straps, Side by Side
| Grade 70 Chain | Ratchet Strap | |
|---|---|---|
| Typical WLL | Higher — e.g. 6,600 lbs (3/8") | Lower — e.g. 5,400 lbs (4") |
| Abrasion / sharp edges | Excellent — shrugs off edges and burrs | Poor — webbing cuts and frays |
| Heat & UV | Unaffected | Degrades over time |
| Protects finished cargo | No — can gouge and mar | Yes — gentle on painted/finished surfaces |
| Spotting damage | Easy — damage is visible | Harder — hidden cuts on the back side |
| Speed & weight | Heavier, slower to set | Lighter, faster to throw and ratchet |
| Best for | Steel, plate, coils, heavy machinery | Lumber, crates, pallets, finished equipment |
Whichever you use, the federal requirement doesn't change: your aggregate working load limit must be at least 50% of the cargo weight, and the lowest-rated component sets each tiedown's WLL. A strap with a cut or an unreadable tag counts as zero — same as a damaged chain.
When you throw a strap over a load, you can't always see where it lands, or who's standing on the far side. I put seven stitches in a girl's head one day. She was walking past my flatbed on the other side, right where my strap came over. I never saw her.
That's a lesson I carry every time I throw one now: look first, and if you can't see the far side, walk around before you throw. And here's a habit that's stuck with me since — I carry orange cones on my flatbed. Nobody does. I set them out so people can't walk down the side of my trailer when I'm not standing there watching. You can't guard every side of a load every second. The cones do it for you.
The Professional's Answer
It was never "chains are better" or "straps are better." A real flatbedder carries both, and knows which one the load in front of them calls for. Steel and heavy machinery get chains — for the strength and because webbing won't survive the edges. Lumber, crates, pallets, and anything with a finish get straps — for the speed and because chain would tear the load up.
Match the tiedown to the freight, meet the working-load-limit math, inspect your gear before it goes on, and mind who's around you when you throw. That's the whole job.
This article shares practical experience and a plain-language overview of cargo securement; it is educational and is not legal advice. The controlling rules are the actual text of 49 CFR Part 393 — always verify against the current regulation and your equipment's manufacturer ratings. Working load limits vary by size, grade, and maker; check your own gear's tags.