Hey Chaos, thanks for visiting the site. I never designed a cooling tower before…is that just in Utah where the projects have been at? I have been designing since 1996, it looks like we got into the industry around the same time. It has done me well. When I started, we are using the old drafting boards and NFPA-13 was a 1/4″ thick. Boy times have changed…..geeze I sound like an old man!