Which term refers to the systematic investigation of a structure's stability, strength and rigidity?

• A. Structural Design
• B. Inspection of Facilities
• C. Maintenance methods
• D. Design drawing

Answer: (A)

Structural design is the process of planning and detailing a structure so that it remains stable, strong, and stiff under the loads it will encounter. It combines analyzing loads, selecting materials and cross-sections, and defining geometry and connections to ensure safety (preventing collapse), adequate strength (with appropriate margins), and controlled deformations (rigidity). This is a forward-looking, integrated activity that turns requirements into a buildable solution. In contrast, inspecting facilities assesses current condition, maintenance methods cover upkeep, and a design drawing is a finished plan rather than the process of ensuring performance. So, this term best represents the systematic approach to ensuring stability, strength, and rigidity.