If you have a complex profile applied to a beam and column to represent your trim, you may find it tricky to get them mitered properly. Notice the overlapping “square” boxes at the intersection in the image below.
A solution was recently developed by Boyce which quickly resolves the lack of interaction between beams and columns. Insert a morph object as a single plane at a 45º angle through the intersection point. Using this plane as an operator with upward extrusion on the column, and with downward extrusion on the beam you will have a cleanly mitered trim in elevation, section and model views.
Note the miter line shown in the image below due to different surfaces being applied to the beam and column. This is a bonus tip if you want to express the miter in your documents and model.
In most cases we will want to see the miter “disappear”. If you apply identical building materials and surfaces to both beam and column the intersections clean up. You will see a line where two curves intersect, but this is due to the handling of curves vs planes. For most instances this profile could be altered to use a plane rather than curve to represent the coved portion of the trim; this wold give a clean intersection across the full miter.