This section details the ability to adjust wire tensions (up/down) with structure deflection. This is a required ability in order to consider the analysis of a pole within a system of poles.


To make this test suitable for any line design software, one span with the far end fixed is proposed in the following setup:



By varying the Point Load, the 45-4 WRC pole will be forced to deflect to either shorten or stretch the span of wire. The tension of the wire and the deflection amount will be recorded. If a particular software has the ability to estimate these values outside of a structural analysis, that is acceptable as well since we are only interested in wire response.


Test Conditions:

  • Wire will be exposed to 400 Pascals of wind pressure and 12.5mm of radial ice accretion perpendicular to the line, as the worst stretch load case the wire has seen. No adjustments to wind pressure due to height above ground.
  • Point Load will vary from 0% to 150% of the ruling span tension in 10% increments.
  • All the wire types from the Sags & Tensions section will be evaluated.
  • Span lengths suggested: 40m, 80m, 120m
  • Level spans
  • Final after load values and pole displacement to be recorded.


It is anticipated that some software will allow the 45-4 WRC pole to deflect by different amounts. That is not the focus of this test as we only want to test tension values against a measure of deflection.

For good comparisons, the results should form a smooth a curve of tensions versus deflection. The intention is for graphs of comparison to be possible between different vendor results.