Los Angeles County Municipal Code § 2007.9 Emergency Helicopter Landing Facility (EHLF)

An approved Emergency Helicopter Landing Facility (EHLF) shall be provided on the roof of any building hereinafter constructed, where the roof exceeds 12 stories or 120 feet above the lowest level of fire department access. It shall be designed and constructed in accordance with the Los Angeles County Building Code and Title 24 of the California Code of Regulations, and shall be capable of sufficiently accommodating the appropriate emergency helicopter as determined by the fire code official.

Where any roof at which a helistop; heliport; required low-hover, light-wheel landing site; or EHLF exists or is to be established, no parapet, guard or other structure that would extend any height above the horizontal plane of the landing surface, or that would extend more than 42 inches (1067 mm) above the adjacent roof deck, shall be installed without first obtaining written approval of the fire code official. No structures, including but not limited to tents or membrane structures, additions, or uses, shall be allowed to interfere with the necessary and safe operation of the helicopter landing facility.