The design of a member for combined actions is divided into four design checks. The user can select to check the capacity of the member for biaxial bending combined with axial tension and or axial compression.  The combined bending and axial compression check is split into three separate calculations, these determine the capacity of the member based upon in-plane bucking, out-of-plane buckling and section failure.

In addition to the four main combined action checks, 11 auxiliary design checks may be considered.  These checks determine the capacity of the member using various combinations of two combined actions.  These include checks for biaxial bending (no axial force), axial tension or compression combined with bending about the major or minor axis.

No design properties are required when checking or designing members for combined actions using BS5950.