Highbeam
Super Member
I think some of the DOT regualtions if the equipment is under 10,000lbs it only need one chain front and rear, grade 70 anything over needs one chain at each corner. You have to look at the weight of equipment and the chain strength. That being said when I am hauling my Kioti DK40se which is under 10000lbs I still use one chain at each corner.
Lots of different ways people do it. I have NEVER seen anyone show where G70 chain was required, but rather, a minimum WLL of whatever chain you use is required.
I think to say that one chain in the rear is equal to two tie-downs because it attaches to the trailer twice is a stretch. A tie down to me is independent of the other tie downs and a single chain used as two tie downs means that if the single chain breaks that both tie-downs are broken. That defeats the purpose of two tie-downs.