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This page is devoted to frequently asked questions (FAQ) related to meshing. |
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Why do I no longer receive errors when I change mesh to be only at visible gridlines?
Extended Question: When I mesh slabs and walls at 36”-48”, there are numerous warnings which include no stiffness, negative stiffness, lost accuracy, and ill-conditioned / unstable. However, when I change the meshing option to be only at visible gridlines, the model runs without error, and forces / reactions are significantly different. Why is this?
Answer: Columns In ETABS v9 and older columns are not automatically included as meshing locations. Therefore it is important to mesh at grid lines to avoid ill-conditioning and to ensure a stable model. For ETABS 2013 (v13) and beyond, floor default meshing recognizes columns as meshing points, hence this is rarely and issue anymore
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To connect meshes, what are the advantages of line constraints over mesh generators?
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Why do shells appear meshed though I have not assigned an auto-mesh?
Answer: CSI Software automatically uses general meshing to mesh any areas drawn using more than four joints. To avoid meshing when no auto-meshing has been assigned, subdivide the object such that each region has four joints or less.
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