The weight of the trailer itself. The way I understand it I get the weight of the HHG items in the trailer either way. Under old rules (before 2009) you could count the empty weight of the trailer toward your HHG weight and get paid for it, The new rules require the trailer to be under 12ft tongue to tail, and only have sides 24 or 46 inches high or something like that. The JFTR link is above for those who care. However under a different paragraph as Jughead said, if its a motorcycle trailer the weight of the trailer itself can be counted. Seeing how the trailer is a motorcycle trailer, I want to try to count the empty weight of the trailer toward my HHG weight, I just currently don't have a motorcycle in the trailer.
A old mentor of mine suggested to try to get the weight ticket to describe the trailer as motorcycle trailer (it has tie downs bolted in the floor). I have been told they may not even ask and push it through, if they do ask site the reg. If they continue to put up a fight just let it go.
As I said above, I am not trying to defraud the gov, just would like to get extra reimbursement if legally possible. The trailer is 1500lbs, I am getting about 72 cents a pound, so that is about a extra $1100 bucks before taxes.