rana sir in this post http://www.sepakista...-in-etab-model/ u said that your base-shear is equal to about 5% of seismic weight which seems okay with R=5.5 and UBC 2B seismic zone how to check that base shear is equal to 5% of seismic weight? You dont have to worry about the magnitude as far as you satisify the seismic drift limits of UBC which are 0.025 and 0.020 times story height...based on time period of your building....remember to convert your elastic displacement values to inelastic displacement by mulitplying it to 0.7xR after analysis it gives us elastic displacemnt nd we hve to check for inelastic?? and what is R here?