Steel bridges span all applications: composite steel-concrete highway bridges (20-60m spans), steel box girder for longer spans, truss bridges, and architectural pedestrian overpasses. Each requires specific codes, load models, and fatigue assessments.

Modern bridges are designed for 75-100 year service lives. Hot-dip galvanizing or multi-coat coatings provide 20-30 years before first repaint. Regular inspections (annual routine, 5-year detailed) monitor connections and coating. Complete maintenance manuals and monitoring protocols included.

Superior strength-to-weight ratio enables longer spans with less material. Factory-prefabricated for consistent quality, then rapidly erected with minimal traffic disruption. Inherently ductile for excellent earthquake resistance. Designed for 75-100 year service lives.