The moment capacity by strain compatibility is based on the procedures outlined in the PCI Bridge Design Manual, Art. 8.2.2.5. In this case, all reinforcement (top and bottom) and all post-tensioning tendons are considered. By using an iterative approach the actual stress in each rebar row is calculated, and thus a much more accurate capacity is obtained. Note that this procedure is equally applicable to LFD and LRFD specifications, and equally applicable to reinforced and post-tensioned sections. The strength factor (phi) is not applied to this capacity, and the over-reinforcement condition is not checked either. Furthermore, the cracking moment (Mcr) is not checked in this case either.