This bill introduces a new section to chapter 19.27 of the Revised Code of Washington (RCW) concerning scissor stair regulations within the state building code. It mandates the state building code council to form a technical advisory group tasked with recommending amendments to the international building code. These amendments will specifically address scissor stairs for buildings with more than two dwelling units primarily occupied by permanent residents, ensuring that public health, safety, welfare, and construction costs are taken into account.

The advisory group is required to submit its recommendations to the council in time for the first substantive update to the state building code after January 1, 2027. The bill defines "scissor stairs" as two interlocking stairways with separate exits, enclosed by fire-resistance rated walls. Additionally, the new section will expire on January 1, 2031, establishing a clear timeline for the implementation and review of these regulations.