Good Day,
I have modeled a staircase in Staad using beam and plate elements, but I am unsure about the suitability of the model. My main issue I have relating to the model is whether or not the analysis results obtained for the columns are accurate enough to be used for design, as it is clear that the slabs/plates are playing a part in moment transfer for my loads?
NB: In modelling the Staircase I ensured to apply all my earthquake loads manually to only the columns in the frame as I noticed that the automatic seismic generator would break up the seismic load on the plate elements as well.
I have uploaded the model as a reference. (Please visit the site to view this file)