The answer is No according to Code Interpretation 17-005 issued by the California State Fire Marshal.
What is Fire-Retardant-Treated Wood (FRTW)? Benefits, Codes, and Applications
Building and fire safety codes continue to evolve across commercial, multifamily, and residential construction. Fire-Retardant-Treated Wood (FRTW) plays a major role in meeting code and improving building performance. Understanding what FRTW is, how it works, and when it is required helps builders, architects, and
