Chapter 21.08
STRUCTURAL AND SAFETY REQUIREMENTS
Sections:
21.08.010 Standards listed.
For the purpose of this code, the following radio-television structural and safety requirements are hereby adopted by the city:
(a) Metal masts shall be effectively grounded. Ground wires used on lightning protection systems shall be No. 6 or No. 8 copper A.W.G., or aluminum wire with equivalent current carrying capacity (No. 4 or No. 6).
(b) Ground clamps shall be of the approved type.
(c) A safety wire shall be attached to the cross arm of the antenna so that the antenna will be held if it collapses.
(d) Antenna systems shall not interfere with fire department operation.
(e) An antenna system shall have a full clearance of eight feet from other antennas on flat roofs. An antenna system shall be eight feet above all points on a flat roof.
(f) An antenna system shall not cross a public way, or above or below light, power and communication lines.
(g) Lead-ins shall be separated by at least two feet from power lines with potentials up to 250 volts, 10 feet from lines with potentials higher than 250 volts, and six feet from lightning rod systems.
(h) Wherever possible, the location of the antenna system shall be such that sagging, swinging, or collapse of the antenna will not result in contact with light, power or communication lines which carry voltages of 240 or more volts.
(i) Anchor screws or lead expansion shields shall be used in masonry at anchor points of mast and guy wire supports.
(j) Guy wires shall be at least three-thirty-seconds-inch, four strand cable, galvanized steel, or No. 14 gauge solid galvanized steel wire.
(k) Antenna systems shall be adequately supported to withstand extreme wind conditions.
(l) Chimneys shall not be used as a mast support.
(m) Masts shall be set in an approved metal base if placed on a roof.
(n) All antennas, except those of the self-supporting type, with masts 10 feet or higher shall be guyed in sets of four guy wires at each 10-foot level of the mast.
(o) The angle of the guy wire with the mast shall not be less than 30 degrees.
(p) Antenna supports on frame structures shall be fastened to rafters or beams with adequate screw eyes or hooks.
(q) The maximum height of antennas mounted on frame structures shall not exceed 40 feet above the ridge of the roof.
(r) The materials entering into the construction of the antenna system shall be of a quality that meets the standards of recognized testing laboratories such as the Underwriters Laboratories, and shall bear the stamp of approval of these laboratories as well as the trade mark of the manufacturer.
(s) Mast and miscellaneous hardware shall be noncorrosive.
(t) Attachment of any part of the antenna system to light, power, or communication structures or poles shall be prohibited. [Ord. 210 N.S. § 5‑520(4), 1952].
21.08.020 Enforcement.
Any person, firm or corporation violating any of the provisions of this chapter shall be prosecuted pursuant to Chapter 1.16 PGMC. [Ord. 08-006 § 78, 2008; Ord. 210 N.S. § 5-520(5), 1952].