dave makes good points as always....i have used steel tubing for
guy supports myself. the turning moment that dave mentions is an
important consideration. i put a couple of pieces of re-bar in each
tube and then filled them with concrete....i also tilted the tubes
away from the tower 2-3 degrees.
steel tubing can be very expensive if purchased new.....look for a
scrap steel house and save a bundle!
i also had a local welder weld guy wire ears on the free end and a
cross bar on the buried portion. the installation never showed any
signs of tipping or twisting in the ground although the installation
was not up very long.
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