This text offers structural engineers, architects and contractors information on all aspects of steel, concrete and composite design of tall buildings. It features case studies of many buildings constructed in the past two decades to provide insight into why and how structural systems were chosen. Steel connections are covered in detail including proposed building modifications resulting from the Northridge, California and Kobe earthquakes. The book also includes studies on seismic vulnerability and upgrade of buildings not meeting current ductile detail requirements of the buiding code, and coverage on wind/seismic design and the concept of lateral bracing of tall buidings.