I'm trying to design a mat foundation. When I run the calcs I'm getting this warning as in the pic above. Does anyone know if this is concerning? The deflections are around 0.78" for D+L load case.
If you only provide vertical supports and have any lateral loads the entire mat can slide. This can result in instability or large lateral deformations. https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/3038/ram-instability-in-finite-element-analysis-tn#mat
Seth Thank you! But I don't have any lateral loads applied in the model. Is there a way to check the sliding of the mat ?
You can plot lateral deflection (plan X or Y directions) for any load case or combination.