Are smoke compartment walls required to be provided in ground level lobbies?
Smoke barriers for occupancies in Groups I-2 and I-2.1 shall be provided to subdivide every story used by patients for sleeping or treatment and to divide other stories with an occupant load of 50 or more persons, into at least two smoke compartments.
The 2016 California Building Code, Section 407.5, Exception 3 includes conditions that may permit the omission of smoke compartments in a story or portion of a story when the area is not classified as a Group I-2 or I.2.1.
2007 California Building Code (CBC) Section 407.4
2010 California Building Code (CBC) Section 407.4
2013 California Building Code (CBC) Section 407.5
2016 California Building Code (CBC) Section 407.5