I am trying to figure out my governing load cases for the roof (joists, etc.) of a warehouse I am designing and am getting hung up on the E factor. I just graduated and was never required to determine E in school (it was always a given). I am working my way through the code and am getting hung up on my QE factor. I am stuck here because all of the other factors that I am using in my basic load cases are in units of psf. If I use V or Fp as the code suggests to determine QE, my units are inconsistent (lb vs. psf). How do I translate these factors so I can use them to determine my governing basic load case for roof design?
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