This run of vent goes up and over a beam in the attic. I'm thinking this cannot be right as the vent would no longer slope towards drain per 2000 IRC 3104.2 and maybe other sections as well (IRC 2000 is the year we use in my neck of the woods). Am I correct? There were some really long vent runs in this attic before they went vertical to the roof but this was the goofiest one.

Thanks,

Eric

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