Detailed Construction Requirements for Trolley
and Electric Railway
Contact and Feeder Conductors and Their Supporting Messengers,
Span Wires, Etc. (Class T Circuits)
71.3 Material and Strength
The strength of poles shall be as prescribed in Section IV, except that in computing the strength of poles supporting Class T circuits, consideration shall be given the stresses set up by the dead weight of brackets, span wires, etc.