Wires, cables, ropes, antennas, or other suspended obstructions installed on the roof of a building having a roof slope of less than 30 degrees (0.52 rad) shall not create an obstruction that is less than 7 feet (2133 mm) high above the surface of the roof.
- Such obstruction shall be permitted where the wire, cable, rope, antenna or suspended obstruction is encased in a white, 2-inch (51 mm) minimum diameter plastic pipe or an approved equivalent.
- Such obstruction shall be permitted where there is a solid obstruction below such that accidentally walking into the wire, cable, rope, antenna or suspended obstruction is not possible.
[California Code of Regulations, Title 19, Division 1, §3.05(b)] Fire Department Access and Egress. (Roofs).
- 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 (2134 mm) or more between the roof and said obstruction.
- 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 one-sixth the height of the mast.
- Metal bars, grilles, grates, or similar products manufactured to restrict entry through windows or exterior doors may be installed in accordance with Chapter 9 of the LAMC (Building Code).
- Buildings located within 8 feet (2438 mm) 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 (2438 mm) from the pole or access structure but shall extend no farther.