When performing an analysis with RF‑CONCRETE Members, I get Error 2212: 'The rib is not supported'. How can I perform the calculation?


For the correct design of ribs, you should pay attention to the following points:

  • The local z-axis of the rib must be parallel to the local z-axis of the surface.
  • The local z-axis of the rib must be orthogonal to the xy surface plane.
  • The surface type of the connected surface must be a plane.
  • The cross section type of the rib member must be a rectangle.
  • In the case of continuous members, there must be a uniform rib type for the entire set of members.
  • The material of the rib must be the same as the material of the surface.


Rib not supported error 2212


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