Rust is potentially dangerous and can cause metal parts to become stiff and weaken the integrity of the metal and thus the structure. Repairing deteriorated steel bridges after decades of use is time-consuming, expensive, and difficult to keep up with. Hot-dip galvanization for steel not only protects metals from corrosion but also improves maintenance-free longevity. Thus, in the long run, businesses are saving money by keeping their steel galvanized Structural American Galvanizers AssociationDec 10, 2017 · A hot-dip galvanized steel bridge allows for a range of design possibilities affecting both beauty and functionality. Unlimited by the weight constraints of concrete, steel bridges can take on a variety of appearances whether a truss, suspension, or cable-stayed structure, steel bridge design is limited only by the engineer s imagination.