I put up a 40' free standing aluminum tower last last year, with a
2-element quad on top. The tower was easy to walk up and seems to be
exactly what was advertised.
The problem is that, as the years have passed, I find I am no longer a
climber --- even for a little 40' tower. In retrospect, I should have gone
for a crankup (with the lifting/tilting device, as well). I am trying to
estimate how much hassle there would be in changing towers. My target
would be the U.S. Towers 55', three-section crank up.
I currently have about 2.75 yards of concrete in the ground, in an
irregular 3 x 4' pattern, about 4-5' deep. Could I use this as the base
for the crankup? I would cut off the current mounting leg connectors,
drill fairly deep holes in the concrete and use construction epoxy to hold
the new mounting bolts for the crank-up. Should I pour more concrete next
to the current mass (and maybe drill a few connecting rebar holes to link
the two "pours" together)?