Concerning scissor stair regulations in the state building code.

HB 2228 requires Washington's state building code council to form a technical advisory group to recommend changes allowing "scissor stairs" (interlocking stairways with separate exits) in multi-unit residential buildings with more than two permanent dwelling units. The group must consider public safety, health, and construction costs in its recommendations, which must be ready for the 2027 building code update. This bill directly affects builders and developers of apartment-style housing, aiming to potentially simplify stairwell designs in such buildings. The advisory process expires on January 1, 2031, with no immediate code changes enacted.