https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/224858/seismic-load-generatorI am using the seismic load generator for the first time. Can you please verify that I have applied it correctly? This is a viaduct with a long through-truss span.en-USTelligent Community 12https://communities.bentley.com/thread/693122?ContentTypeID=1Mon, 24 Jan 2022 12:52:35 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:604d5488-d216-4794-912b-8e971701d0b9Modestas<p>In your model your have a REPEAT LOAD commands, so each static seismic load case has to have a PERFORMA ANALYSIS and CHANGE commands after it. A more detailed explanation can be found here:&nbsp;<a href="/products/ram-staad/w/structural_analysis_and_design__wiki/57823/warning-if-this-ubc-ibc-analysis-has-tension-compression">WARNING IF THIS UBC/IBC ANALYSIS HAS TENSION/COMPRESSION - RAM | STAAD Wiki - RAM | STAAD - Bentley Communities</a><br /><br />Everything else seems to be modeled correctly.</p><div style="clear:both;"></div>