blueriver said:
I quess I am from the old school and my daddy was a good teacher. We fasten everything down with chains and binders, we carry a pipe in the trailer boxes so we can crank down those load binders!
From
Cargo Care: Tying It On
"One of the most common mistakes drivers make when securing a load is believing that tighter is always better.
"This country seems to have a philosophy of might makes right," says Larry Strawhorn, chief engineer with the American Trucking Assns. "So if tightening a chain with a 2-foot bar is good, they think a 4-foot bar must be really good. You can make something too tight." Strawhorn is on a committee of government and private industry representatives working on new North American standard securement guidelines. "Quite often, when we’ve looked at what’s wrong, it’s the load is too tight," he says.
How can too tight be a problem? Aside from damaging the load, you’re putting too much strain on your securement devices. Say, for instance, you’re securing a 1,000-pound coil with something that has a working load limit of 1,500 pounds. If you tighten it up to 1,500 pounds, then sudden braking or other movement, even bumps in the road, puts more load onto the chain or strap. So you’ve exceeded that working load limit — not just of the chain or strap, but of the chain binder, stake pocket or winch as well.
"Overtightening is probably one of the biggest mistakes that’s made," says Rodney Reynolds with Columbus McKinnon’s chain division. "Chain actually has a memory to it, and I can tell you what the maximum load it’s seen out in the field." In addition, he says it’s not uncommon to see failed chains that have been stressed past where they should have been.
You can overtighten straps, too. Some drivers use a cheater bar on the winches on the sides of the trailer just as they do tightening chain binders."