Q: Is fire-retardant-treated wood permitted in a healthcare occupancy for roof construction, including girders and trusses, in Type II (000) construction? Background: NFPA 101-2012
Section 18.1.6.2 and 18.1.6.3 allows FRTW for certain Type I and II construction but does not mention Type II (000). NFPA 220-2012 Section 4.3.2.9.2 indicates FRTW is allowed in Type II buildings.
A: I would have to say that the 2012 LSC (based on 18/19.1.6.2 and 18/19.1.6.3) would NOT permit fire retardant treated wood for roof construction. This section would over-ride anything NFPA 220 would say.
Fire-retardant treated wood is not considered non-combustible or limited combustible materials.
Brad Keyes, CHSP, is the owner of KEYES Life Safety Compliance, and his expertise is in the management of the Life Safety Program, including the Environment of Care and Emergency Management programs.
A Shift in Healthcare Facilities Management
Trauma-Informed Design Transforms Boston Homeless Shelter
Inside One of Healthcare's Most Ambitious Hospital Projects 
Disinfectant Contact Time: The Case for Biofilm Disruption
Texas HHSC Reaches Construction Milestone for Panhandle State Hospital in Amarillo