When the lead height ratio is between 1/2 and 3/4, head guys should be:

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Multiple Choice

When the lead height ratio is between 1/2 and 3/4, head guys should be:

The important idea is how the geometry of the guy wires affects the forces at the top of the pole. When the lead height ratio sits between about half and three-quarters of the pole height, the angle between the lead wire and the suspension strand creates a larger resultant load on the head guy than if the lines were more vertically aligned. To carry this increased load with an appropriate safety margin, the head guy needs to be a step stronger than the suspension strand. That’s why selecting a head guy one size larger than the suspension strand is the correct approach in this mid-range ratio. Using the same size would under-ride the strength required under this geometry, while going two sizes larger would be unnecessarily conservative and costlier.

The important idea is how the geometry of the guy wires affects the forces at the top of the pole. When the lead height ratio sits between about half and three-quarters of the pole height, the angle between the lead wire and the suspension strand creates a larger resultant load on the head guy than if the lines were more vertically aligned. To carry this increased load with an appropriate safety margin, the head guy needs to be a step stronger than the suspension strand. That’s why selecting a head guy one size larger than the suspension strand is the correct approach in this mid-range ratio. Using the same size would under-ride the strength required under this geometry, while going two sizes larger would be unnecessarily conservative and costlier.

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