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  1. gthomer

    Underground Facility Stair Pressurization

    Sorry for the ambiguity. Specifically, the pressure difference between the stair and the outside, at the bottom of the stair, (DPsob), is 8.7 in. of water. I was shooting for something in the neighborhood of 0.05 in. of water. This pressure difference is eventually used to calculate the flow...
  2. gthomer

    Underground Facility Stair Pressurization

    I'm designing a stair pressurization system for an existing facility that is largely underground. My design occupant load is not decided on yet, so I am performing calculations in advance of this decision for two situations/assumptions: 1) all stair doors closed, and 2) some stair doors open...

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