Structural integrity refers to the ability of a structure, such as a building or bridge, to withstand its intended load without experiencing failure. This concept ensures that the materials used, like steel or concrete, can support the weight and forces acting on them, including gravity, wind, and seismic activity. Engineers assess structural integrity through various methods, including stress analysis and material testing. By understanding how different forces affect a structure, they can design safe and reliable systems that protect both people and property. Maintaining structural integrity is crucial for the longevity and safety of structures like skyscrapers and dams.