Chapter 11 Design Approaches
11.1 General. The requirements of Section 11.1 shall apply to
all sprinkler systems unless modified by a specific section of
Chapter 11 or Chapter 12.
11.1.1 A building or portion thereof shall be permitted to be
protected in accordance with any applicable design approach
at the discretion of the designer.
11.1.2* Adjacent Hazards or Design Methods. For buildings
with two or more adjacent hazards or design methods, the
following shall apply:
(1) Where areas are not physically separated by a barrier or
partition capable of delaying heat from a fire in one area
from fusing sprinklers in the adjacent area, the required
sprinkler protection for the more demanding design basis
shall extend 15 ft (4.6 m) beyond its perimeter.