Has anyone seen/used the term under/over sprinkler on a set plans? Someone in my office has a set of plans where the contractor called out the sprinklers as under/over sprinklers. At first I thought maybe it was describing pendant sprinklers below the ceiling and upright above, protecting a combustible concealed space. However, the construction noncombustible (concrete floors and gyp ceilings). The only details on the plans are for a concealed sprinkler on a return bend and a detail for an upright sprinkler. I'm sure they will be contacting the contractor about the term but I was just curious if anyone here had seen the term.
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