Can we assume by the OP's name that they are a plumber? If so, I have to wonder if they follow code when working in their trade? I would almost bet they do, because when an inspector shows up to sign off on a permit, if code has not been followed, then there is no approval... job stopped. See, codes and capacities are in place for very good reasons.
Now, I have seen some answers here that are very far from being accurate. If this guy really wants good information it won't come from here. Maybe a call to Freightliner might enlighten them to the engineering involved in establishing ratings and capacities (axle and brake ratings etc.). Just a thought...
