https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/119737/applying-floor-loads-to-displace-the-location-of-the-cgHi, I am modelling a steel structure for which the weight and center of gravity are known. The objective is to check the reactions on the supports and to verify the overall structural integrity. I have finished the model now, I used a factor on theen-USTelligent Community 12https://communities.bentley.com/thread/369554?ContentTypeID=1Fri, 27 May 2016 18:58:58 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ea52fc03-2d7c-450e-b8bc-dde2ae6f8d69SyeTo calculate the CG correctly and also to find out the correct support reactions, you need to know the weight of the equipment and it’s location in the structure. If there is a single equipment and you know the location of that, your job is easy. You can find out its weight by subtracting the self weight of the structure from the total weight (including the equipment). You can subsequently follow the procedure described in the wiki below to include imposed loads as part of the CG calculation<br /> <br /> <a href="http://communities.bentley.com/products/structural/structural_analysis___design/w/structural_analysis_and_design__wiki/28648.how-can-i-find-out-the-cg-of-my-structure">communities.bentley.com/.../28648.how-can-i-find-out-the-cg-of-my-structure</a><br /> <br /> If you have multiple equipment, then you can do a trial and error but the calculation will only be approximate. Finding out the actual weight and location of EACH equipment would be the way to go to get an accurate estimate.<div style="clear:both;"></div>