STAAD PRO CE

Hello Everyone.

I just want to know when we model water tank with top, bottom and conical dome.

after analysis we got result in terms of stresses for which we need to provide R/F.

Now can you please tell me if Sx*thickness give hope force and it  is divide by dome thickness give hoop stress than if we repeat same process for calculation with Sy than it give meridonal stress?

Or Meridional Stress or Radial Stress are same???

i m going to attaches ss of my model with plate orientation.