I have been looking further in the mean time. Now I found the following "steel quiz".
The answer to question 10 states that section H2-1 should be used when the Iyc/Iy ratio is not met. Although section H2-1 refers to section F for flexural check and section F also has the same limitation...
I am performing a structural analysis for an existing structure. This structure contains elements that does not fullfill the requirements set in Equation F13-2 of AISC 360-5/10. The section (vertical column) is a HE140A profile reinforced using a big strip with a cross-section 40x400mm.
Now I...