Successful construction requires not only knowledge of material properties and corrosion and fire behavior but also a solid understanding of statics and strength theory, as well as thorough training in the essential design principles of this specific construction method. This book focuses on these design principles and imparts the necessary foundational knowledge. It covers the most important design and calculation rules for solid wall beams, truss beams, frameworks, crane tracks, frame structures, and load-bearing elements with thin-walled cross-sections. In addition to detailed graphic documentation of the constructions, the relevant proofs are presented in a clear and comprehensive manner through numerous calculation examples. The basis for all calculations is now the new German (DIN 18800-1 to -2) and European standards (EC 3 [Steel Construction]). Composite constructions made of steel and concrete are addressed in a separate section based on EC 4 [Composite Construction]. Additionally, the fatigue and operational strength of steel under dynamic loading, along with the corresponding proofs, is a detailed topic in this book.