[Code of Federal Regulations]

[Title 47, Volume 1]

[Revised as of October 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 47CFR17.45]



[Page 936-937]

 

                       TITLE 47--TELECOMMUNICATION

 

              CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION

 

PART 17_CONSTRUCTION, MARKING, AND LIGHTING OF ANTENNA STRUCTURES--Table 

of Contents

 

Subpart C_Specifications for Obstruction Marking and Lighting of Antenna 

                               Structures

 

Sec.  17.45  Temporary warning lights.



    During construction of an antenna structure, for which red 

obstruction lighting is required, at least two 116- or 125-watt lamps 

(A21/TS) enclosed in aviation red obstruction light globes, shall be 

installed at the uppermost point of the structure. The intensity of each 

lamp shall not be less than 32.5 candelas. In addition, as the height of 

the structure exceeds each level at which permanent obstruction lights 

will be required, two similar lights shall be installed at each such 

level. These temporary warning lights shall be displayed nightly from 

sunset to sunrise until the permanent obstruction lights have been 

installed and placed in operation, and shall be positioned so as to 

insure unobstructed visibility of at least one of the lights at any 

normal angle of approach. If practical, the permanent obstruction lights 

may be installed and operated at each



[[Page 937]]



required level as construction progresses.



[32 FR 11273, Aug. 3, 1967, as amended at 39 FR 26157, July 17, 1974; 42 

FR 54826, Oct. 11, 1977]