: Assign rigid diaphragms to slabs to ensure the software correctly calculates Center of Mass and Center of Rigidity , which is critical for seismic behavior.
A well-structured ETABS tutorial moves from grid definition → modeling → loading → analysis → design → results interpretation. The key to mastering ETABS is consistent practice with small models (2–3 stories) before scaling to complex high-rises. Engineers should always validate ETABS results with hand calculations for critical members. etabs tutorial