Which design approach is described as a method of design based on the ability of a structure to fulfill its function?

• A. Limit states
• B. Limit States Design
• C. Load modifiers
• D. Strength design

Answer: (B)

Designing a structure to reliably fulfill its function uses the Limit States Design approach. It centers on performance criteria defined by limit states—ultimate limit state for safety and resistance to collapse, and serviceability limit states for how the structure behaves in everyday use (deflections, cracks, vibrations). By choosing loads and material strengths with appropriate safety factors and checking that the structure stays within these limits under all plausible conditions, this method ties the required capacity directly to the ability to perform as intended over its life. That focus on function through well-defined limits is what makes Limit States Design the best description. The other terms are related ideas but do not describe a full design method centered on function in the same way.