Show a snapshot(s) of your CII model. I have seen many ways to model Air Coolers and most are way off from reality. Better advice can be provided if you provide some more physical data.


As Michael eluded to, the flange support seems like a "paper" solution akin to grabbing at straws.
_________________________
Bob Zimmerman, P.E.
Vice President of The Piping Stress International Association (The PSI)