https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/136721/differences-in-types-of-load-combinationsI am looking to inquire what the difference between the &quot;RC-Design&quot; type load combination and the &quot;Design&quot; type load combination is when designing reinforced concrete beams and columns. I have run both types and cannot figure out the difference betweenen-USTelligent Community 12https://communities.bentley.com/thread/413823?ContentTypeID=1Fri, 26 May 2017 12:41:34 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:132249ad-69a3-4d47-9fd8-7651b7be1aaaKarl G<p>More on the different load combination types can be found on the web page below:</p> <p style="margin:0in 0in 0pt;line-height:normal;"><a href="/products/structural/structural_analysis___design/w/structural_analysis_and_design__wiki/3157"><span style="color:#0000ff;">https://communities.bentley.com/products/structural/structural_analysis___design/w/structural_analysis_and_design__wiki/3157</span></a></p> <p><span style="font-family:Times New Roman;font-size:medium;"> </span></p> <p>&quot;RC-Design&quot; combinations are used only for the design of concrete beams, columns, walls, and foundations. If the model contained members with other any other material, the &quot;RC-Design&quot; combinations would not be used to design those members.</p> <p>&quot;Design&quot; combinations are used for the design of all members regardless of material type.</p> <p>If your model only contained concrete members, then you would only need to define &quot;RC-Design&quot; or &quot;Design&quot; combinations but not both.</p><div style="clear:both;"></div>