Workgroup asks staff to refine IRC vs IBC comparisons for multiplex appendix
Staff introduced a multiplex housing appendix to allow certain vertical multiunit configurations under an IRC path; members questioned some single‑stair assumptions, emphasized engineering cost differences between IRC and IBC, and asked staff to revise Section 2A with clearer IRC/IBC comparisons.
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SBCC staff presented a draft multiplex housing appendix targeted for the International Residential Code (IRC), allowing more than two units to be placed vertically under a residential code pathway rather than the International Building Code (IBC). The staff member framed the appendix as a way to enable multiplex typologies under a more residential design approach and as part of the 2024 code package.
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