Amazing here we need five chains to carry an excavator on a trailer they use one.There was a lot of shouting, but with the limited resources, restrictive space and excitable audiences they did very well.Tell whos ever loading the big rock at the front small rocks at the back then you wont have trouble tipping.Why load that large a material on a truck with such a narrow gate opening, that appears to be the start of the issue along with what someone else posted about overloading trucks.