In STAAD.Pro why can't the same load case / combination be used in different load envelopes? A warning in the output states that the same load cases are used in multiple load envelopes. If this does occur what is the impact on the results, if any? Isn't one of the uses of load envelopes used for viewing/filtering post-processing results? How would having the same load case in multiple load envelopes impact viewing/filtering post-processing results? This isn't clearly stated in the Help manual.
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