503.2.10 Substandard width roads.
FC § 503.2.10
Buildings on fire apparatus access roads that have an unobstructed roadway width of less than 34 feet (10 363 mm) shall be protected throughout by a sprinkler system. Buildings served by a substandard width fire apparatus access road that is a lawfully existing condition pursuant to FC 102.3, 102.4 and 102.5 shall comply with this requirement when undergoing alteration or a change of occupancy in accordance with FC 501.4.3. This requirement shall not apply to any detached, unheated carport, garden shed, greenhouse, private parking garage for not more than three motor vehicles, tower or other accessory building, that is: 1. Classified by the Building Code as a Group U occupancy; 2. Not occupied or designed to be occupied for residential, commercial or office purposes; and 3. Accessory to a Group R-2 or Group R-3 occupancy.
