Structural Mechanics provides an in-depth coverage of mechanics of structures with an approach that departs from the conventional strength of materials approach. It proceeds from the theory of elasticity to analyze the three-dimensional response to mechanical loads with a focus on slender structural elements: bars or beams, and assemblages thereof, known as trusses, frames, or ossatures. Written with a rigorous perspective based on Saint-Venant's theory, the book develops practical solutions to structures problems. It enables readers to classify structural members and identify the conditions under which a structural component can be idealized for analysis of load bearing capacity. The book covers three-dimensional theory of beams of any cross-sectional shape or form, including flexible rods, rings, tubes, multi-cell sections, and thin-walled structures. The book is intended for upper-level undergraduate mechanical, aerospace, and civil engineering students taking courses in Structural Mechanics, Structural Analysis, and Mechanics of Aerospace Structures. Instructors will be able to utilize a Solutions Manual and Figure Slides for their course.