I have a Type V-A Group R-2 apartment building whose code summary indicates as having four stories atop two levels of basement, all of the same construction and occupancy, and requiring a 13R system type.
I’m no expert in the building code, but it's my understanding that in order to have a building taller than four stories and still use 13R, a 3-hour horizontal assembly would be required having Type I construction below such assembly and up to four stories above; this building looks to be Type V throughout six levels with no horizontal assembly.
The large building is vertically separated into four individual buildings by 2-hour fire walls but I see no horizontal separation.
Is there a way this proposed 13R sprinkler system can be code compliant (IBC 2015)?
Thanks in advance.
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