General Order 95
Section VI
Detailed Construction Requirements for Tower Lines
 and Extra High Voltage Lines (Class E Circuits)
66.2    Use
    
Where mechanical loads imposed on towers or structures are greater than can
be supported with safety factors as specified in 
    Rule 44
 or the design of such towers and structures requires it, additional strength
shall be provided by the use of guys or other suitable construction.
 Where guys are used with structures capable of considerable deflection before 
failure, the guys shall be able to support the entire load, the structure
below the point of guy attachment acting merely as a strut.
 Guys shall be attached to structures, as nearly as practicable, at the center 
of load. They shall be maintained taut and of such strength as to meet safety 
factors of Rule 44
 .