A. Every mast and antenna installed on a roof is mounted on its own platform or plate, which shall be of such design as to adequately transfer the stresses to the roof system.

B. Outdoor antennas shall be of an approved type. A separate set of guy wires shall be required for each ten feet in height, with a maximum of one hundred twenty degrees horizontally between guy wires. The vertical angle between guy wires and mast shall be not less than thirty degrees. Guy wires shall be not less than three thirty-secondths of an inch, five-strand cable or equivalent, galvanized; shall be securely anchored, and the top set of guy wires shall be anchored separately.

The above guying requirements may be modified, provided adequate proof is filed with the inspector to ascertain that the antenna is self-supporting when subjected to a wind pressure of twenty-five pounds per square foot.

C. In no case shall an antenna be installed nearer to a street, sidewalk or power line than the height of the antenna plus eight feet, and no wires, cables or guy wires shall cross or extend over any part of any street or public sidewalk, unless approved by the inspector.

D. Whenever it is necessary to install antenna near power lines, or where damage would be caused by its failing, a separate safety wire must be attached to the top of the mast, and secured in a direction away from the hazard.

E. Masts shall not be secured to brick chimneys.

F. Turnbuckles, when used, shall be protected against turning by threading the guy wires through the turnbuckle.

G. Every antenna must be adequately grounded for protection against a direct stroke of lighting with a No. 8 aluminum or No. 8 copper ground wires, grounded to water piping continuing a minimum of ten feet outside the building or to a driven ground rod, six feet in length.

H. Transmission lines must be kept at least six inches clear of telephone or light wires.

I. Rawl plugs are approved only for supporting transmission lines.

J. Lightning arrestors shall be approved as safe by the Underwriter’s Laboratories, Inc., and both sides of the line must be adequately protected with proper arrestors or neon lamps to remove static charges accumulated on the line.

K. When lead-in conductors of polyethylene ribbon-type are used, lightning arrestors must be installed in each conductor.

L. When coaxial cable or shielded twin-lead is used for leading, suitable protection may be provided without lightning arrestors by grounding the exterior metal sheath.

M. Ground straps for grounding masts and attaching arrestors to water pipe shall be approved ground fittings.

N. The miscellaneous hardware, such as brackets, turnbuckles, thimbles, clips, and similar type equipment subject to rust or corrosion, shall be protected with a zinc or cadmium coating by either galvanizing or sherardizing process after forming.