Concerned with safety and the total collapse of the structure. Resistance to yielding, buckling, and fracture. Stability: Prevention of overturning, sliding, or sway. Serviceability Limit State (SLS):
A is a condition beyond which a structure no longer fulfills its intended purpose. Engineers must verify that the structure never reaches these two primary states: 1. Ultimate Limit State (ULS) Focuses on safety and preventing total failure or collapse. limit state design of steel structures pdf