In API-650 we can use ASCE 7 for determine the wind pressure. One of the factors is zg which uses a value of z. In ASCE 7-02 under "Other Structures" z was defined as the centroid of the area under consideration. In ASCE 7-05 it does not seem to say this. For a 40' high tank, should z be at the...
In 3.9.7.1 a. there is a formula for calculating the velocity pressure p to then be compared to 36 psf as noted in d. This is then to be used to determine H1. If the V is 115 mph, should the value of V used to calculate p be 115 or 120? In d it says that you do this when other factors are...
