When designing spherical vessel with PV elite we shall fill the straight flange length.

We know what code do not require straight flange for spherical shell.

1- to meet the code and PV elite engineering practices requirements, what's the value we shall introduce for straight flange length?

Otherwise and for wind deflection calculation, PV elite use the straight flange length as structure height but zorrilla indicate that L is the structure height. If we introduce zero as straight flange all calculation and verification remain failed for wind and stress calculation.

2- What shall I do to perform wind calculation for sphere and it's legs?