This chapter shows the calculation of the value of time‐dependent strains of concrete due to creep and shrinkage. These values influence the determination of the effects of actions. In the chapter, the effect of action is related to the calculation of the design bending moment at the internal support of the continuous composite beam. This moment is obtained by summing the bending moment due to the actions (permanent and variable) and the bending moment due to shrinkage. Primary and secondary effects due to creep and shrinkage of the concrete flange must be taken into account appropriately. For the continuous beam, the global analysis is performed with defined regions of cracking of concrete, clause 5.4.2.3(2), EN 1994‐1‐1. Shrinkage of the concrete flange causes sagging curvature and shortening of the composite beam.