No person shall install or maintain any wire, barbed wire, razor ribbon, fence, cable, aerial, antenna, or other obstruction on any building roof, parapet wall, or openings in an exterior wall required for Fire Department access, in such a manner as to obstruct access or egress, or cause a hazardous condition in the event of fire or other emergency.
EXCEPTIONS:
1. Guy wires, rods, aerial or antenna masts may be attached to a roof structure having a slope of less than 30 degrees provided there is full clearance of 7 feet or more between the roof and said obstruction.
2. Guy wires or rods required to support aerial or antenna masts may be attached to a roof structure a lateral distance from the mast not in excess of 1/6 the height of the mast.
3. Metal bars, grills, grates, or similar products manufactured to restrict entry through windows or exterior doors may be installed in accordance with Chapter 9 of the Los Angeles Municipal Code (Building Code).
4. Buildings located within 8 feet of utility poles or similar structures which could otherwise be used to gain access to the building’s roof, balcony or similar surfaces. Such obstruction may extend to where the surfaces are more than 8 feet from the pole or access structure but shall extend no farther.