Sec. 95.408  (CB Rule 8) How high may I put my antenna?

    (a) Antenna means the radiating system (for transmitting, receiving 
or both) and the structure holding it up (tower, pole or mast). It also 
means everything else attached to the radiating system and the 
structure.
    (b) If your antenna is mounted on a hand-held portable unit, none of 
the following limitations apply.
    (c) If your antenna is installed at a fixed location, it (whether 
receiving, transmitting or both) must comply with either one of the 
following:
    (1) The highest point must not be more than 6.10 meters (20 feet) 
higher than the highest point of the building or tree on which it is 
mounted; or
    (2) The highest point must not be more than 18.3 meters (60 feet) 
above the ground.
    (d) If your CB station is located near an airport, and if you 
antenna structure is more than 6.1 meters (20 feet) high, you may have 
to obey additional restrictions. The highest point of your antenna must 
not exceed one meter above the airport elevation for every hundred 
meters of distance from the nearest point of the nearest airport runway. 
Differences in ground elevation between your antenna and the airport 
runway may complicate this formula. If your CB station is near an 
airport, you may contact the nearest FCC field office for a worksheet to 
help you figure the maximum allowable height of your antenna. Consult 
part 17 of the FCC's Rules for more information.

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WARNING: Installation and removal of CB station antennas near powerlines 
is dangerous. For your safety, follow the installation directions 
included with your antenna.
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[ 48 FR 24894 , June 3, 1983, as amended at  48 FR 41416 , Sept. 15, 1983]