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SBCC committee issues interpretation: ADU/duplex cannot egress through another unit; protected shared egress allowed under specified conditions
Summary
The BFRW approved a committee interpretation finding that an ADU or duplex unit may not legally egress through another dwelling unit, but a shared protected egress area is permissible for two‑family dwellings if it meets Washington amendments (R302.3/302.35) and opening‑protective requirements.
The BFRW voted Feb. 13 to approve a draft opinion answering whether an accessory dwelling unit (ADU) or duplex may egress through another unit and whether attached dwelling units may use a shared egress area.
Dustin reviewed the code language and the committee's reading of the 2021 IRC: "Based on these sections, R311.1 and R311.2, it…
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