Rigid & Semi Rigid diaphragm Differences In ETABS

In this tutorial, we want to point out one of the differences between rigid and semi-rigid diaphragms in ETABS. When you assume that the diaphragm is semi-rigid, the software no longer reports the center of Rigidity in its reports. Therefore, the calculation of the center of Rigidity must be a rigid diaphragm. And to obtain the diaphragm forces, you must use a Save As file from main design file.
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Should have made comparisons of running time, load distribution to shear walls specifically, and diaphragm forces via horizontal section cut of the floor plan.