3/8 grade 70 chain; that is a common size; has a WLL of 6600 lbs. In a 4 point hookup you are only allowed to count 50% of the WLL so each chain is 3300 lbs. You would have 2 chains on the back so you are holding 6600 lbs. You need to hold .8 on the back against forward movement. So two 3/8 grade 70 chain will hold a tractor that weighs 8250 lbs from forward movement. You would also need the 2 chains on the front.
The weird part is if you use 1 chain on the back and run it from one side of the trailer threw the back hitch on the tractor to the other side of the trailer you can hold this same 8250 lb tractor. Makes no sense to me but that is the way the rule is written.
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Today's Featured Article - Show Coverage: Journey to Ankeny - by Cindy Ladage. We left Illinois on the first day of July and headed north and west for Ankeny, Iowa. Minus two kids, we traveled light with only the youngest in tow. As long as a pool was at the end of our destination she was easy to please unlike the other two who have a multitude of requirements to travel with mom and dad. Amana Colonies served as a respite where we ate a family style lunch that sustained us with more food than could reasonably fit into our ample physiques. The show at Ankeny
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