Mohamad3010,

Are you talking about allowable stresses?

As far as local load analysis calculation is considered, we always need to do calculations for

- Pure membrane stress (Allowables: S)
- Pure membrane + local membrane stress at discontinuity and due local loading like nozzles (Generally Allowables: 1.2S to 1.5S)
- Membrane + Bending stresses (Generally Allowables: 2.25S to 3S)

Regarding whether you should check the box for "Print membrane stress at nozzle Edge" will not affect your results. It will just print the calculated results in report.

Thanks.