Requirements when in SDC D - F (beams seismic: ACI 318)
When designing members for earthquake effects, beams not part of the SFRS when in Seismic Design Categories D through F are required to be designed with seismic provisions all the same.
Note: With the exception of seismic cantilevers,
the design of these members for seismic provisions is beyond scope in the current
release of Tekla Structural Designer.