https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/172870/steel-roof-truss-on-concrete-beams-and-columnsDear all, I am relatively new to STAAD Pro. I have been able to model my building frame in reinforced concrete as well as some roof trusses in steel sections including Zed purlins. I have 3 issues: 1) how to model roof loading to transfer roof loadsen-USTelligent Community 12https://communities.bentley.com/thread/498312?ContentTypeID=1Thu, 27 Dec 2018 20:41:20 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:98ab8a29-e9a0-48fd-9287-266bef85e4f2Sye<p>1. If you have modeled the purlins, you may apply member loads on the purlins. The loads are going to transfer from the purlins to the roof truss at all node locations where the purlins are connected to the roof truss.</p> <p>2. Ensure that the steel roof structure shares common nodes with the concrete supporting structure below. This would automatically ensure connectivity and ensure proper load transfer</p> <p>3. Take a look at the analysis and design results. Nodal displacements and utilization ratios of the members would give you an idea as to whether you need extra bracings.</p><div style="clear:both;"></div>