Basement bathroom exhaust duct loop
I need to install a bathroom exhaust fan in my basement. I’m near the steel support beam (5 feet away) that supports the middle of the I- joists. The I joists are continuous over the support beams.
I’m concerned about putting a 3.5 inch hole through the I joists. I’m equally concerned amount putting a p- trap in the exhaust duct. See the attached drawing.
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