allowable stress defined and except load when uc calculation

Hello,

I am using the STAAD pro advanced

I am writing for have a 2 questions.

1. Can I defined allowable stress?

In my project some of case just need to calculated uc by Yield stress or tensile strength (do not used allowable stress). but, in the program, automatically input the AISC when If I am undefined the code.

2. How can I except the load case for UC calculation?

because, I have 4 load case for each axis of wind load and combined them. but the severe case is not combined load case so, I could not check the UC ratio in the combined case.

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