Is it possible to return the nodal displacements for a portion of the diaphragm that is not attached to a "frame" element? I'm wanting to look at diaphragm corner displacements for a torsional irregularity check, but my frames (walls in this case) do not necessarily correspond. I have one corner where my frames don't continue all the way to the roof (so i can't pull nodal displacements at the roof), and another corner where I don't actually have an element.
It would be great if I could assign a node (at each floor) at each corner of the diaphragm to view the drifts as that location.