A structure must satisfy two basic criteria: strength and serviceability. The ﬁrst relates to the ability of a structure to carry design loads for its speciﬁed service life. The second relates to its ability to satisfactorily operate or perform its intended function during its service life. Strength considerations for concrete beams internally reinforced with steel that are further strengthened with external FRP fabrics and beams internally reinforced with FRP reinforcement were presented, respectively, in Chapter 5 and Chapter 6. Whereas strength considerations are important to ensure the safety of a structure under design loads, its satisfactory performance under service loads is equally important because functional considerations are the reasons for creating a structure. Deﬂection, crack-width control, creep-rupture stress, and fatigue are related to performance of a concrete structure during its service life. This chapter presents a discussion along with design examples on the serviceability aspects of concrete members internally reinforced with FRP reinforcement.