Its 0.33 pounds of pressure per square inch.
when I decided to replace the top braces on my 100g ply tank, I took them off, tank did not bow at all so I left it for maybe 2 hours, came back, mesured, no bow not even 1/6" sice then I have trust in plywood
Frankie, are you saying no beer while working on this? thats it, project canceled