In a message dated 97-12-17 01:28:39 EST, tjerk@iafrica.com writes:
> I have a 100 foot Rohn type triangular tower 20 inch across the face
> with three sets of guy wires.
> The 33 and 66 foot wires are anchored 66 foot away from the tower.
> The 100 foot wires are anchored 100 foot away from the tower.
>
> What should the guy wire tension be?
>
The working tension is typically 10% of the ultimate breaking strength.
For 1/4 inch EHS, the UBS is 6700 pounds so the tension should be 670 pounds.
For 3/16 inch EHS, the UBS is 4000 pounds and the tension should be 400
pounds. These figures are for EHS (Extra High Strength) cable only and 60
degrees F. There will be more measured tension for lower temperatures and less
for higher temps.
The easiest and cheapest way to measure guy wire tension is with a LOOS
guy wire tensioner. It's a simple device that will let you measure the tension
within about 3% accuracy in a matter of seconds. It's available from TOWER
TECH for $39.00.
73, Steve K7LXC
TOWER TECH -- professional tower supplies and services for amateurs
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