The objective of this ebook is to introduce civil undergraduate students to the behavior and design of reinforced concrete buildings. Chapter 1 covers an introduction to building design, calculation of demand, design methodologies and structural safety. Chapter 2 covers material properties of concrete and reinforcing steel. Chapters 3 to 10 covers design of reinforced concrete frame elements including beams, one-way slabs, columns, beam-column joints and spread footings. An introduction to the behavior and design of shear walls is also covered in Chapter 11. Seismic design considerations are briefly discussed at the end of Chapters 4, 8, 9 and 11 for beams, columns, beam-column joints and shear walls, respectively.