Hi ajay damle

You might have overlook load case L15 as mention by Sam manik is the maximum value among all possible (only wind effect) load case that is suppose to add with sustain stress the get OCC stress. It should be OK.
You can add only wind effect coming from all each possible direction with sustain stress get get 4 different Occ stress or just pick the highest wind effect then add with sustain to get worse OCC stress.

Hi manu

load on support & nozzle can definitely be different from different direction wind load. so we can not avoid those cases.

Regarding stress since we may have non-linearity like single directional support, gap in support, support with friction so effect on wind direction also be different , Hence we need to follow those load cases.

Regards

Habib