I wasn't 100%sure why they did the twist so I "cut and pasted" some theory. before I stuck my foot in my mouth.
5.27 Because Figure-8 cable has a non-symmetrical crosssection
it can exhibit airfoil characteristics during certain wind
loading and icing situations. To prevent this potentially damaging
situation, twist should be applied to the cable between poles.
Corning Cable Systems recommends twisting the cable so that it
makes one 360o revolution every 6-9 meters (20 - 30 ft).
5.28 Apply the twist to the cable as it is moved from its
temporary support hardware into the permanent fittings after
tensioning and dead-ending. For pole lines of equal spacing, the
twist can be applied in alternating directions at every other pole.
In this way, two pole spans are twisted simultaneously. Where
pole spans vary, the twist may need to be applied at each pole to
maintain the same pitch.
Re: self support / figure 8
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