My Kaufman Dump Trailer Overloaded In this video I was loading concrete into my 7 x 14 kaufman dump trailer to haul to the dump. I accidentally overloaded it, I didn't know by how much or if it would even dump. Its hard to judge when hauling concrete in a dump trailer because sometime there are a lot of voids so the trailer may look fuller then it is. Im always nervous something is going to break.