used bridge erecting machine refers to a bridge-building machine that has been previously used, is currently in use, or is planned for resale. These machines, also known as bridge erectors or prefabricated bridge builders, are heavy-duty equipment specifically designed for constructing bridges. They play a crucial role in placing prefabricated bridge components at designated locations, facilitating the construction of bridges over rivers, canyons, or other obstacles.

When purchasing a used bridge erecting machine, similar considerations apply as when buying a used gantry crane. Safety, maintenance history, and operational efficiency are key factors to keep in mind.