The axial-flexural limit state is checked at every horizontal and vertical section cut within the wall design group, using the provisions of clause 11.2.6

In determining the axial-flexural strength of a cross-section the concrete behavior defined in Clause 6.1.4 (a) is assumed, and an elasto-plastic stress-strain curve for steel is adopted.

The combined effects of in-plane moments, transverse moments and axial loads are considered assuming that all three effects are distributed evenly throughout the cross section and that the assumptions of beam engineering theory applies.

The stressed state of the section under consideration is determined, and checks are made to ensure that the material limits are not exceeded.