Hookum wrote: A rated chain has a 4 to 1 safety factor. Working Load vs breaking strength. Does that make you feel any better?
No, not really, it doesn't make me feel better.
Isn't that rating factor already taken into account when the required load rating is specified? If you put on chains or cables that are half of the recommended rating, they're still half of the recommended rating.
You'd be encroaching on the built in safety factor. If that was good enough, then that is what the rating recommendation would be.
2007 Holiday Rambler Endeavor 40PDQ 400 ISL Cummins/Allison
2002 Chevy Avalanche toad
Inside: Him, Her, and a pack of little furballs...
Each of the tow safety chains on my rig, which came from a dealer, has a tab which says it is rated at 1900-pounds "SWL" (standard working load?), and a 7600-pound "Ultimate Breaking Load." This follows the 4-to-1 rule cited above.
I think the chain is 5/8-inch-diameter links, which is not a small chain.
My tow weighs 6000 pounds. So, to depend on the SWL rating (1900 X 2= 3600) means I have a too-small chain. But, to depend on the "ultimate breaking load" (7600 X 2 = 15,200) means I have an abundance of margin.
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