The yield check is performed at member ends and at 11 equally spaced intermediate sections along the member length.

At each section the following forces are applied:

• F_x max. axial force along member
• F_y actual shear in local y-direction at section
• F_z actual shear in local z-direction at section
• M_x max. torsional moment along member
• M_y actual bending about local y-axis at section
• M_z actual bending about local z-axis at section

For all profiles other than angle sections absolute values of the stresses are used. For

double symmetric profiles there will always be one stress point.

The stresses are calculated in several stress points at each member section. At each stress

point the von Mises stress is checked as follows:

Where:

σ_tot = | σ_x + σ_by + σ_bz |

• σ_p stress from hydrostatic pressure.