Helistops may be erected on the roofs of buildings, subject to the following conditions:
A. On all touch-down or landing areas, whether elevated or flush with the roof, provision shall be made for collecting volatile substances which may be spilled in event of any emergency. Separator or clarifier tanks for collecting spilled volatile substances shall be installed under approval and supervision of the Fire Department.
B. The roof-top shall have at least two (2) conforming exits and they shall be located in such a manner as to permit safe exit from the roof area in the event one of the exits is blocked.
C. A wind indicating device shall be installed. A flag, banner, or similar device is acceptable.
D. Two or more wet standpipes shall be provided and equipped with one and one-half (1½) inch rubber lined fire hose not over one hundred (100) feet in length. Hose shall be equipped with combination fog nozzles. Sufficient pressure shall be available to afford a good fog pattern. Hose cabinets or racks shall be located near the separate exits. Standpipe outlets shall be so located that all portions of the roof area shall be within one hundred twenty (120) feet of the outlet.
E. Two fire extinguishers of at least sixteen (16) BC rating shall be provided, and be located remotely from each other.
F. No roof-top obstructions which may be difficult to see from the air shall be permitted within the required glide slope.
G. Such lights as are installed to illuminate the touch-down pad shall be directed on to the touch-down pad only, and in such a manner that the light rays cannot interfere with the helicopter pilot's vision, or other aircraft flying within the area of the landing facility.
H. No persons shall be permitted in the general landing area in any location where any portion of their bodies will be higher than the touch-down area surface while landing or take-off operations are underway.
I. Approved means of communication such as telephone, radio, fire alarm box, or signaling device shall be provided adjacent to the landing area.
J. If the roof has no parapet wall, a substantial fence shall be provided around the perimeter of the roof to insure the safety of all persons.
K. Roof-top markings. The bull's eye type marker shall be used for roof-top helistops. The painted border line marking the take-off and landing area may be a solid or broken line. The outer circle of the “bull's eye” should be inscribed within the touch-down area whose sides should be tangent to the circle. The dimensions of the bull's eye marker are thus determined by the size of the touch-down area. Each roof-top heliport should have painted with the bull's eye, in numerals not less than two feet in height, the maximum gross weight in thousands of pounds of the equipment which the roof is stressed to accept.
L. The helicopter landing facility should be located in such an area as would permit a glide slope angle determined by a ratio of eight feet horizontal distance for every one foot of vertical clearance required. Two such approaches shall be available, at least 90 degrees removed from each other.
M. The touch-down area shall be surrounded on all sides by a clear roof area averaging 15 feet in width, but with no side less than 5 feet wide. For helicopters of less than 3,500 pounds gross weight, the touch-down area shall be a minimum of 20 feet x 20 feet in size.
N. The touch-down area, if less than 3 feet above roof surface, should be available normally by only one path of approach which shall be within view of the pilot. If elevated more than 3 feet, two approaches opposite from each other shall be provided. However, one approach, which is not in view of the pilot, should be restricted and used only for emergencies.
O. The roof-top shall have two conforming exits and they shall be remote from each other.
P. No light standards, roof vents, guy lines, TV aerials, or other similar roof-top obstructions which may be difficult to see from the air, shall be permitted within the required glide slope on three sides, or within a 270 degree arc.
Q. No refueling or repairing is to be accomplished at the helistop except in extreme emergency and then only as approved by the Fire Department.
R. The roof-top shall be marked as prescribed by the Federal Aviation Agency.
S. The City Engineer's approval of a building for use as a roof-top facility shall be required as to structural adequacy.
('65 Code, § 17A-6) (Ord. No. CS-570 § 1 (part))