|
Re: Plumbing vent height
From the IRC (and other plumbing codes).
- P3103.1 Roof extension. Open vent pipes that extend through a roof shall be terminated at least 6 inches (152 mm) above the roof or 6 inches (152 mm) above the anticipated snow accumulation, whichever is greater, except that where a roof is to be used for any purpose other than weather protection, the vent extension shall be run at least 7 feet (2134 mm)above the roof.
That means that when there is mechanical equipment on the roof, sun decks, you name it, the plumbing vents need to extend up above the roof 7 feet. This is to get the terminal end above the peoples who will be using the roof for whatever reasons they are using the roof.
IF the roof is used for "weather protection" only (not counting when someone goes up to do repairs or cleaning on the roof - the roof's purpose in those cases is still "weather protection") then the vent terminal must be at least 6" high above the roof, plus whatever additional height is required by the AHJ for snowloading so the vent is never buried in snow.
|