Mariog,

I really appreciate your time and help.

I did use Pi= 69.25 in of H2o (good catch).After finishing up the calculation for A, I am getting A = 4.396 in^2.

Now I am working with Tank software. Under general roof data,

1. Can I use A=4.396 in^2 value (Net area at Roof/Shell (A)in^2?
2. What is your suggestion regarding "Roof live load" for the tank software

regards,
Mayur