Instability at a Joint in the MZ directionhttps://communities.bentley.com/products/ram-staad/f/ram-staad-forum/215439/instability-at-a-joint-in-the-mz-directionHello, I was carrying out an analysis for a frame and was informed of instability at a joint. Although i have two pinned joints in 3D model space , i have included releases to take care of out of plane moments and torsion on the top beam. However, theen-USTelligent Community 12RE: Instability at a Joint in the MZ directionhttps://communities.bentley.com/thread/657605?ContentTypeID=1Mon, 28 Jun 2021 07:28:16 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:4127bda4-81bd-4c09-8c5d-c6445a686d2dObiajulu Onyemeh<p>The structure is designed as a space structure not a planar structure. So&nbsp; shouldn&#39;t the joints behave as pinned in all axes?.&nbsp;</p><div style="clear:both;"></div>RE: Instability at a Joint in the MZ directionhttps://communities.bentley.com/thread/657601?ContentTypeID=1Mon, 28 Jun 2021 07:19:55 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:29f30ad7-bd87-48a5-91f5-bd8d4e449fd8Suvadeep Acharjee<p>The model has out of plane loading so pinned supports would be unable to handle the rotation. Thus instability warnings are reported</p><div style="clear:both;"></div>RE: Instability at a Joint in the MZ directionhttps://communities.bentley.com/thread/656493?ContentTypeID=1Mon, 21 Jun 2021 15:38:25 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:8ee7d8b8-7194-4054-9a24-5676e78b27feObiajulu Onyemeh<p>Hello, i applied releases in the MX and MY directions and still had the instability warning.</p><div style="clear:both;"></div>RE: Instability at a Joint in the MZ directionhttps://communities.bentley.com/thread/655824?ContentTypeID=1Thu, 17 Jun 2021 09:47:59 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:f4198665-4dea-4afc-bacd-5d359c322faeAbhisek M<p><a href="/products/ram-staad/w/structural_analysis_and_design__wiki/2046/staad-pro-instability-and-zero-stiffness-faq">https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/2046/staad-pro-instability-and-zero-stiffness-faq</a></p> <p>Please refer this link to understand the reason.</p><div style="clear:both;"></div>RE: Instability at a Joint in the MZ directionhttps://communities.bentley.com/thread/655813?ContentTypeID=1Thu, 17 Jun 2021 09:19:37 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:9d966df8-a1da-4e3b-a59b-a9ed3123360cObiajulu Onyemeh<p>Please note that when i change one or both footings to fixed connections, the warning is gone.&nbsp;</p><div style="clear:both;"></div>