Scott Dillow
Registered User
Curious what others opinions are on this. Code is 2018 IEBC & IBC. I have a two-story wood-frame dormitory style youth detention facility with a basement (Type VB construction). We are adding a single-user toilet room off a dayroom on the first floor (So Level 2 alteration). To get air into the room we are tapping off a supply duct in the basement and running a 4x6 duct up into the new toilet room wall cavity and then above a suspended ceiling to a diffuser. The existing floor/ceiling assembly does not appear to be rated, and under VB does not have a rating requirement, but I assume we'd need a minimum 1-hour duct damper? Section 717.6.1 does not seem to permit a fire damper because we are an I-3 occupancy. As this duct would only be connecting 2 floors, I would think a fire damper should cover it. Building is not sprinklered. What am I missing?