Open-deck freight commonly pays a premium over van work for a blunt reason: the trailer doesn't hold the cargo on — you do. The federal rules in 49 CFR 393.100 through 393.136 are the same whether you pull a 48-foot flat or a 40-foot hotshot gooseneck, and the numbers in them are the line between a clean inspection and a bad afternoon on the shoulder.
The math an inspector runs first
Every chain, strap, and binder carries a working load limit — WLL — stamped or tagged on it, and the rule that matters most is simple: the aggregate working load limit of the tie-downs holding an article has to be at least half the weight of what you're hauling. Ten thousand pounds of steel needs at least five thousand pounds of aggregate working load limit on it. That's the floor, not the goal.
One wrinkle worth knowing before you add up the tags: a tie-down that runs through, over, or around the freight and back to the trailer counts its full WLL toward that total, while one that hooks straight from the trailer to an attachment point on the cargo — the way chains commonly hook to machinery — counts half. Two more details bite people. A tie-down is only as strong as its weakest piece — a chain rated at 6,600 pounds hooked to a 5,000-pound anchor point is a 5,000-pound tie-down, and unmarked gear gets defaulted to the weakest grade in the tables, which is a good argument for buying marked equipment. And the whole system is designed around hard braking: the performance standard behind these rules assumes the load pulls forward harder than it pulls sideways or back, which is why the front of your load deserves the most thought.
Counting tie-downs the way the rule does
For an article that isn't blocked against sliding forward, the minimums run like this: one tie-down if it's five feet or shorter and eleven hundred pounds or lighter. Two tie-downs if it's five feet or shorter but heavier than that — or anything longer than five feet, up to ten. Past ten feet, add one more tie-down for every additional ten feet or fraction of it. A 22-foot bundle takes four: two for the first ten feet, one each for the two lengths after.
Blocking changes the count. Snug an article against a headerboard, a bulkhead, or other cargo that can't move, and the requirement drops to one tie-down per ten feet or fraction — that's the front-of-load logic in action, something rigid absorbing the forward energy so the tie-downs don't carry it alone. And remember these counts are the generic minimums: machinery, metal coils, logs, paper rolls, and a handful of other commodities have their own sections in the rule with their own requirements. If you're hauling one of those, read its section before you quote the load.
Chains, straps, and what edges do to both
Chain is for freight that would eat a strap — steel plate, machinery with hard corners, anything with edges that don't care about scratches. Webbing is for freight a chain would wreck: lumber, crated goods, coated pipe, anything that marks. Neither one outranks physics — a strap run over an unprotected steel edge is a strap you'll eventually find in two pieces.
That's why edge protection isn't optional dunnage. The rule requires it wherever a tie-down would be cut or abraded at the point it touches the cargo, and the protector itself has to resist cutting and crushing. Corner protectors are cheap; straps aren't, and neither is the conversation after one lets go on the interstate.
The first fifty miles, and every stop after
Securement isn't something you do once at the shipper. The rule requires you to check your cargo and tie-downs within the first fifty miles — freight settles, webbing seats, chain finds slack you'd swear wasn't there at the dock. After that, you re-examine whenever you change duty status, or every three hours or a hundred fifty miles of driving, whichever comes first.
Make it a habit instead of a chore. Walk the load at every fuel stop with a hand on every strap and eyes on every binder and edge protector. Thirty seconds per side is cheap insurance against the phone call nobody wants to make.
Tarping is craft, and craft is what prices the load
Tarping protects two investments at once: the freight under the tarp and the tarp itself. A tight tarp with padded corners over every sharp edge sheds wind instead of fighting it; a loose one flogs itself to death at seventy miles an hour and takes the shipper's finish with it. Build your edge protection before you pull a single flap, and tension the whole thing so it doesn't drum.
Here's the honest economics of open-deck: securement is the skill the freight is paying for. The premium goes to the driver whose chain grades are known, whose count is right, and whose load looks the same at the receiver as it did at the shipper. Inspectors check your securement at every scale; your reputation gets checked at every dock. Know the rules, know your equipment's numbers, and the rest is your decision to make well.