http://i205.photobucket.com/albums/b...210101024a.jpg
This is a pic of the grader I moved from Montreal QC to Stoney Creek, ON (close to Buffalo, NY and US border). I used 2 chains in the front, 2 in the middle, and 3 in the back. I know most guys use only 4 chains for something like this (plus one more chain over the blade, right?) but I wanted to comply with the DOT requirement of 0.4 G for the forward movement and 0.5 g for the rearward movement. Which means the chains in the back of the machine must be able to withstand roughly 40% of its weight. And to add to confusion, there's an "aggregate work load limit" requirement, where all chain WLL together must be equal to at least 50% of the machine weight BUT - get this - only chains that go from one side of the trailer to the other side through or over the load are awarded the full WLL (4,700 lbs in my case). If a chain's one end is hooked to the trailer and the other - to the machine, for the purpose of the "aggregate work load" requirement it only counts as 50% or 2,350 lbs with my 4,700 lb WLL chains.
Could they have made it more complicated?
So, I put a bunch of chains on the rear of the grader (especially since it had wheels) and made sure chains were going from one side of the trailer to the other - through the 'eyes' on the frame of the machine. If you looked at the grader from the back, it looked like I had 20 chains in there
So, ow do you calculate how many chains to put on a machine like this? Weight: 33,600 lbs. Length: 28 ft. Height: close to 10 ft.[ATTACH=CONFIG]626[/ATTACH]