All television receiving antenna installations shall be made in accordance with the following rules and regulations:
(a) Masts and antennas shall be of noncombustible and corrosion-resistant material.
(b) Every mast and antenna installed on a roof shall be mounted on its own platform or plate covering two or more rafters of the roof and shall be securely anchored with guy wires.
(c) Masts and antennas shall not be fastened directly to the roof or supported by combustible members or materials.
(d) Outdoor antennas shall be of an approved type and shall not exceed the maximum height of thirty feet above a roof support or seventy feet above a ground support. In areas where reception is affected by obstructions, special permission may be granted by the City Inspector to exceed the above specified height limitations.
(e) Every antenna must be adequately grounded for protection against a direct stroke of lightning with an adequate ground wire.
(f) In no case shall the antenna be installed nearer to the street, sidewalk or power lines than the height of the antenna plus ten feet, unless approved by the City Inspector.
(g) Whenever it is necessary to install an antenna near power lines, or where damage would be caused by its falling, separate safety wires must be attached to the crossarm of the antenna and secured in a direction away from the hazard.
(h) Anchor points for antennas, masts and guy wires must be lead anchor screws or lead expansion shields drilled into solid block, concrete or other noncombustible construction.
(i) Transmission lines must be kept at least six inches clear of telephone or light wires.
(j) Rawl plugs are approved only for supporting transmission lines.
(k) Standoff support insulators must be used at least every ten feet in running the transmission line. (Ord. 477. Passed 12-28-53.)
(l) Where television receiving antennas are installed on a private residence, the antenna may be installed on the roof of a frame structure, provided the support and anchor screws are securely fastened to the rafters or beams or other substantial members, and provided, further, that no antenna installed on a roof of a frame construction or in any way supported by material of combustible construction shall exceed a height of thirty feet above the roof of the building. Such antenna shall be guyed at each ten feet or fraction thereof, using three guys at each elevation on the mast. A one-fourth inch turnbuckle shall be used in each guy wire. The guy wire shall be composed of stranded wire containing no less than six strands of No. 20 steel wire, with eight and one-fourth inch screw eyes or screw hooks for anchors and no ratchet tighteners. No two guys shall be attached to one anchor. No. 12 copper or copper-coated, or, above ground only to the ground mast, one-half, inch by eight-foot copper or copper-coated ground rod using a proper ground clamp, shall be used. No other ground will be allowed.
Turnbuckles shall be locked by returning the end of the make up of the guy wire back through the turnbuckle and serving it back on the guy wire.
(Adopting Ordinance)
(Adopting Ordinance)
(m) Lightning arrestors shall be approved as safe by Underwriters' Laboratories, Incorporated, and both sides of the line must be adequately protected with proper arrestor or neon lamps to remove static charges accumulated on the line, except when a folded dipole or other type of antenna is used which is already grounded to the mast.
(n) When lead-in conductors of polyethylene ribbon-type are used, lightning arrestors must be installed in each conductor.
(o) When coaxial cable or shielded twin lead is used for lead-in, suitable protection may be provided without lightning arrestors by grounding the exterior metal sheath.
(Ord. 477. Passed 12-28-53.)
(p) Antennas shall be designed and installed to withstand a wind pressure of thirty pounds per square foot and in no case shall guy wires be less than three thirty-seconds, six strand cable or equivalent, galvanized. Rawl plugs shall not be used for guy wires or for mounting brackets.
(Adopting Ordinance)
(q) Ground wires shall be of a type approved by the National Electrical Code, as adopted in Section 1460.01, for grounding masts and lightning arrestors and shall be installed in a mechanical manner with as few bends as possible.
(r) Ground clamps for grounding masts and attaching arrestors to ground rod shall be approved ground fitting. No other ground shall be allowed.
(s) Miscellaneous hardware, such as brackets, turnbuckles, thimbles, clips and similar equipment subject to rust or corrosion, shall be protected with a zinc or cadmium coating by either a galvanizing or sherardizing process after forming. These finishes are selected to guard against corrosion due to stack gases and other deposits and to protect the elements against electrolytic action due to the use of adjoining dissimilar metals.
(t) Turnbuckles shall be protected against turning by threading the guy wires through the turnbuckle.
(Ord. 477. Passed 12-28-53.)
(u) Any mast on a roof exceeding twenty feet must have a ten-foot monitor T. K. Television tower or its equivalent using telescope seamless steel tubing only. Such mast shall be guyed at each ten feet or fraction thereof above the tower using three guys at each elevation on the mast. A one-fourth inch turnbuckle shall be placed on each guy wire. No two guy wires shall be placed in one turnbuckle. Guy wire shall be no smaller than six No. 20 steel stranded wire. One-fourth inch by four-inch screw eyes or hooks shall be used for. anchors. Where three sets of guys are used, the lower two sets of guys may be connected to one anchor. Top guys must be on separate anchors, and turnbuckles must be, in all guys.
(Adopting Ordinance)
(v) No guy wires shall be tied directly to the earth. All guy wires shall be tied to posts to clear seven and one-half feet or more above the ground. Such posts may be of pipe or wood set in the earth at least three feet deep. The base of the tower shall be set in concrete two feet square and three feet deep for a thirty-foot tower and an additional one foot in depth for each ten feet above thirty feet or an equivalent base to manufacturer's specifications. Each ten feet of the tower over thirty feet, or fraction thereof, shall be guyed.
(Ord. 477. Passed 12-28-53.)