The efficient design and assessment of concrete structures is of socio-political and economic interest to designers, property owners and developers. Structural design and assessment are based on the satisfaction of ultimate limit state and serviceability limit state requirements. Designing reinforced concrete structures involves dimensioning structural members and designing the reinforcement. For a safe, serviceable and economical design it is crucial to determine the dimensions of structural members and the amount of the reinforcing bars in the entire structure properly. A design procedure that finds the optimum structural dimensions and reinforcement amounts to satisfy the design serviceability and ultimate limit states can result in a minimised cost design solution.