Note:
The moment in the wall varies considerably for different locations in the wall. The reinforcing could differ at several locations for a highly efficient design. The thickness of the wall could also vary, either tapering the wall or stepping the wall. However, for the sake of time, the reinforcing will be kept consistent for the entire wall. One design for the vertical moments, and the other for the horizontal moments. This is a common practice in engineering. Time is not only saved for the design engineer, but also the detailers and construction crew saves time as compared to a more complicated design. This design philosophy is entitled to change if substantial material savings could be realized and if time permits.