AISC 360-16 Section E4 does not generally apply to I-shapes, except in the case where "the torsional unbraced length exceeds the lateral unbraced length". For beams and horizontal braces the program sets Lcz equal to Luy. This is based on the assumption that any type of connection to a beam that braces the beam laterally will also prevent rotation. This will be true for the vast majority of connections to beams. In the rare case where it is not the user can assign a longer unbraced length if desired, resulting in a reduction in the axial capacity of the member. For columns and braces the program sets Lcz equal to the larger of Lux and Luy. This is conservative, but the user can assign a shorter unbraced length if desired, resulting in an increase in the axial capacity of the member.

In the calculation of the allowable compression capacity of Tee sections, the limit state of flexural-torsional buckling is checked per the AISC 360 ASD and LRFD requirements but is not considered for ASD 9th or LRFD 3rd. In those Specifications the E3 Commentary says that this check is typically not required for most common Tee shapes.