I have a "process" that creates approx. 1.7" of water column throughout a large enclosed surface area, at temperatures ranging from 1500 to 2250 F. I am trying to show the actual force applied to the shell over a large surface area from the known measurment of pressure. For instance, I have 1.7" water column, at 1560 F, in a chamber approx. 15ft x 10ft x 65ft. how can I show the force applied to the entire shell?