What is WLL for real. I used the chains yesterday. We had to winch and drag trees on to the road that were separated by a deep and wide ditch. Buddy has a 12K winch on his trucks bumper and several attempts the winch would not move the logs.
12K pounds of force acting on a chain with a WLL of 6600 pounds. Almost 2 times the WLL and the chains are fine. Hows that possible?
wll as explained earlier 1/3 of AVERAGE breaking strength, for steel and metal rigging.
Fiberous rigging is something like 1/10 of breaking strength, hence truth in advertising
Electric winches and their ratings are largely to be taken with a grain of salt, and max pull is with the first layer, and it rapidly decreases from there, to sometimes less then 1/2 of rated strength.
Now I have used 5/16 grade 70 chains to lift some insane loads but its not something I would recomend (6500# rating lifting 14000# with just the one chain on a spread... chain is still in good shape, no elongation or broken links, that said as i stated earlier I've snapped similar "rated" chains pulling far less weight so... be careful?)