Currently I've been doing seismic analysis for our cracking furnace. Let's just say I was advised to consider Primary Loads 1 to 6 as seismic weights for the seismic definition. (1 to 6 are basically dead loads) The code currently looks like this…

I know when I input seismic UBC/IBC seismic loads I should type Perform Analysis and Change after each load case. The problem is, I am using National Building Code of Canada to generate seismic loads in my model and STAAD Pro still gives me the warning…