General Order 64-A
Section V
Detailed Construction Requirements For Supply Lines
(Class H, L and T Circuits)
57.5 Fastenings.
Messengers attachments shall have
a strength at least equal tot hat of the strand to which they are
attached. Cedar and other soft-wood
poles to which any messenger having an ultimate strength of 5000 pounds or more
is attached, shall be protected by suitable shims and where necessary with
hooks, lag bolts or other equivalent means to prevent the messenger from
slipping along the pole.