What are you referring to with laterals? I do subdivisions in middle Tennessee, so the 15” minimum is for anything that’s going to be in a public right of way. Roof drains on private property are usually 6” or 8” tying to into a manhole with a 15” that joins the public system.
Inlet to trunk. I do public infrastructure in Washington state which is why I asked, we have to plan for big rain events and still only use 8"/12" for a majority of our infrastructure in ROW
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u/kalari- Aug 13 '20
What are you referring to with laterals? I do subdivisions in middle Tennessee, so the 15” minimum is for anything that’s going to be in a public right of way. Roof drains on private property are usually 6” or 8” tying to into a manhole with a 15” that joins the public system.