https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/249981/staad-warning***NOTE: Equivalent Static Analysis should preferably be performed for regular structures with approximate natural time period less than 0.4s and regular structures with height less than 15m in Seismic Zone II. Ref Cl.6.4.3 and 7.6 BASE SHEAR AND TIMEen-USTelligent Community 12https://communities.bentley.com/thread/781372?ContentTypeID=1Mon, 11 Sep 2023 18:32:50 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:a2b9fc79-bd05-4c8d-bb19-a0397cb32f3bAbhisek M<p>This is not a warning and just note to remind the conditions for which you should using equivalent static analysis method. If you found that the conditions are not met in your model, you should go for response spectrum load case.</p><div style="clear:both;"></div>