The axial-flexural limit state is checked at every horizontal and vertical section cut within the wall design group, using the provisions of BS 8110-1:1997 Clause 3.9.3.

In determining the axial-flexural strength of a cross-section the material behavior defined in BS8110-1:1997 Clause 2.5.4 is assumed.

The combined effects of in-plane moments, transverse moments and axial loads are considered according to 3.9.3.6.4 (c), assuming that all three effects are distributed evenly throughout the cross section and that the assumptions of beam engineering theory applies.