Engineered Rigging rents and sells specialized transport equipment to move heavy loads inside of an industrial plant or warehouse, on the road, at a construction site and at an Accelerated Bridge Construction project. Our Self-Propelled Modular Transporters (SPMTs) provide a game-changing ability to move heavy equipment through small entries and tight corridors. The pivoting wheel assemblies allow the trailer to move forward, backward and sideways. With a self-sufficient power source that eliminates power cords, the units can rotate 360 degrees without changing its midpoint. They fit where other trailers can’t! We have three models available to buy or rent. American Cranes & Transport calls SPMTS “wheeled wonders” and “rigging heroes.”