Structural Concepts. This introductory course focuses on structure in architectural design. It investigates a variety of typical structural elements, namely: columns, beams, trusses, arches, and cables operating in compression, tension, bending, or torsion to achieve structural equilibrium. This theme is expanded further through the application of these elements to form a structural system, with an overview of one- and two-way spanning systems, and of load transfer through the structural system. Optimal selection of structural systems and reasons for structural failure are reviewed.