I have a problem with showing single beam ends rotated (or cut) on plan.
In case where the plan is not orthogonal (90°) I cannot find any option for rotating the beam ends.
Although it is possible to achieve ends rotation in 3D by rotating the beam, on plan it is always orthogonal.
I have changed the beam to an object (timber purlin which is the only one that has the option to rotate ends but no inclination is available). Another problem with objects is that no structural analytical model is available.