https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/230111/building-weight-for-seismic-calculation-in-ramI have a concrete building with roof at different level acting as a rigid diaphragm. I am getting less building weight (7000kips) in RAM frame compared (10000 kips) to vertical reaction summary for dead load in RAM concrete analysis. II have hand calculateden-USTelligent Community 12https://communities.bentley.com/thread/712608?ContentTypeID=1Thu, 19 May 2022 15:49:53 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:2c451b2f-e281-476e-9906-b0ed7fbd272bSankalpa Dharmadhikari<p>Thank you, this was really helpful.&nbsp;</p><div style="clear:both;"></div>https://communities.bentley.com/thread/712600?ContentTypeID=1Thu, 19 May 2022 15:22:12 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:c47107ba-259f-4b39-8f44-d85fef4ac5a0Seth Guthrie<p>In Ram Structural System the mass loads are defined independently from the dead loads, so they need not be the same. If they are all entered the same there are a few other factors like the splitting of the column and wall mass from adjacent stories (RAM Manager - Criteria - Self-Weight) and the ground level setting in Ram Frame. See also:&nbsp;<a href="/products/ram-staad/w/structural_analysis_and_design__wiki/17968/ram-frame---masses">https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/17968/ram-frame---masses</a>&nbsp;and&nbsp;<a href="/products/ram-staad/w/structural_analysis_and_design__wiki/18422/ram-frame---criteria---ground-level">https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/18422/ram-frame---criteria---ground-level</a>&nbsp;</p><div style="clear:both;"></div>