In this chapter, some practical examples of technical and research projects are described. The studied structures include a pile-supported wharf, a fire station building, embankment and concrete dams, and storage tanks. The main mechanical concepts and analyses of the structures under earthquakes have been explained for didactic purposes; however, the goal is to show what seismic input was applied and to discuss some issues related to seismic design. For all examples, the authors participated in the design; in this sense, they represent professional experiences.