503.3.2 Substandard Width

Buildings on public streets that have an unobstructed width of less than 34 feet (10 363 mm) shall be protected throughout by a sprinkler system. Buildings on substandard width public streets that were not required prior to the effective date of this section to be protected throughout by a sprinkler system shall comply with this requirement when undergoing alteration or a change of occupancy subject to FC501.4.3. This requirement shall not apply to any Group U occupancy complying with the requirements of FC503.2.10.