A trailer combination and trailer components are designed to provide dual functionality in terms of hauling a very high tonnage piece of heavy equipment and the ability to continue to haul more typical pieces of heavy equipment. To accomplish this task, a trailer auxiliary is provided that is adapted to connect to a typical low boy trailer. The trailer auxiliary is equipped with mechanisms to provide a bed assembly that is designed to link to the low boy trailer so that the bed assembly and bed of the trailer auxiliary receive the high tonnage piece of equipment. The trailer auxiliary can be equipped with ramps to interface with the trailer and auxiliary to facilitate the loading of the heavy equipment. The trailer combination also includes a hauling vehicle for each of the low boy trailer and auxiliary, with a spacing bar assembly mounted to one of the vehicles to link the vehicles together when hauling the trailer and the auxiliary.