When we used the HDBX we used to run black pipe all the way to the pad and mount
the rotor on a short pipe just above the pad...that way much of the
twist force is taken off the tower and all it has to do is hold up the pipe.
Never
had any problems with loose revits, etc. when we used that type installation
and we put some pretty big beams on them...
HAVE FUN,
dave
======
K7LXC@aol.com wrote:
> In a message dated 99-04-14 19:21:10 EDT, jfleming@shelbynet.net writes:
>
> > I was surprised to read that the Rohn self-supporting HDBX40 and 48 will
> > support 18 sq ft, but only a 10 ft boom. Am I missing something? Not
> > much with a 10 ft boom... ?? Seems like even a "little" beam would be
> > more than that.
>
> Well, and you'd be right. Rohn BX is basically TV tower and has very
> little torsional resistance (it's for TV antennas, remember?). Anyway, bigger
> antennas will eventually beat up the tower resulting in the rotator plate
> breaking as well as cross braces popping off.
>
> And they're real meat grinders when you have to work on them. Be real
> careful if you want to install one.
>
> Cheers, Steve K7LXC
>
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