The conversation between human and AI assistant.
How are bridges built?
Can you explain how they build the superstructure?
Of course! The superstructure of a bridge consists of the piers, abutments, and span sections. Once the foundation is in place, workers begin constructing the piers, which are the vertical structures that support the bridge deck. Next, they build the abutments, which are the horizontal structures located at each end of the bridge that anchor the deck to the ground. Finally, they assemble the span sections, which are the horizontal members that extend between the piers and abutments to create the bridge deck. The span sections are usually prefabricated off-site and are lifted into place using cranes or other heavy machinery.