This regulation specifies construction material requirements for interior nonbearing walls in Type I or II building construction, requiring noncombustible or limited-combustible materials. Walls requiring a minimum 2-hour fire resistance rating may use fire-retardant-treated wood enclosed within noncombustible or limited-combustible materials, except for shaft enclosures. This is a physical plant/life safety standard applicable to the facility type governed by the broader licensing chapter.
View official sourceK163 Interior Nonbearing Wall Construction Interior nonbearing walls in Type I or II construction are constructed of noncombustible or limited-combustible materials. Interior nonbearing walls required to have a minimum 2 hour fire resistance rating are permitted to be fire-retardant-treated wood enclosed within noncombustible or limited-combustible materials, provided they are not used as shaft enclosures. 18.1.6.4, 18.1.6.5, 19.1.6.4, 19.1.6.5 SECTION 2 – MEANS OF EGRESS REQUIREMENTS