San Francisco Fire Code § 503.4 [For SF] Obstruction

Fire apparatus access roads shall not be obstructed in any manner, including the parking of vehicles. Subject to Health and Safety Code Sections 13104, 13108, 13114, 18941.5, and California Fire Code Sections 1.11.2, 104.1 and 503, the portion of the sidewalk or median, immediately adjoining and extending into a roadway that has no utility pole, street light, street furniture, fire hydrant, trees, shrubbery, or other structure or natural growth attached thereto and that has a height that does not exceed six inches above the roadway shall not constitute an obstruction of a fire apparatus access road. The minimum widths and clearances established in Section 503.2.1 shall be maintained at all times. All projects impacting the width of a fire apparatus access road shall be subject to review by the Fire Department.

Section 503.4.1 of the International Fire Code is deleted.

504.1.1 [For SF] Required Access to Divided-Lot Structures.

When an existing lot is subdivided:

(a) New residential buildings on all such subdivided lots shall have a minimum 5-foot (1524 mm) width clear access pathway, open to the sky, from the public-right-of-way to the new residential building, and any emergency escape or rescue opening. The minimum width pathway shall be maintained through all doors and gates, past gas and electrical meters, and shall not be impeded; except

(b) For lots with an existing building constructed across the entire width of the lot at the front of the lot, new residential buildings at the rear shall have an access corridor with a minimum 5-foot (1524 mm) width and 80-inch (2032 mm) height clear access pathway from the public-right-of-way to the new residential building, and any emergency escape or rescue opening. The minimum width access corridor shall be equipped with fire sprinkler protection complying with California Fire Code Section 903.3, shall be maintained through all doors and gates, past gas and electrical meters, and shall not be impeded.