[TowerTalk] Tower Base Technology

[Mike Foerster]

Dave (and others),

Thanks for the info.  I really like the idea of putting the rotor down near
the base!!  I've heard of guys that have had to replace rotors from time to
time.

What size black pipe did you use and where did you find it?

I have planned on putting the "big block" of concrete at the base, but one
of my jobs at work is to find a better way to do most everything that we do
(i.e. Continuous Improvement...).    I was hoping that someone had a better
idea.

Yes, I know that the TH11DX exceeds the 10 foot, so does most antennas.  But
this one was up for quite a while and considering that the tower is spec'ed
at 18 -20 sq. ft (at 3 ft above the tower) and this antenna is only 12 sq.
ft, and will be mounted just above the tower, it should hold out OK for
another few years.  It did fairly well for 6 years.  Would have been better
if the guy would have done the maintenance that he should have.

Anyway, thanks for your comments.

Mike


----- Original Message -----
From: wa3gin@pop.erols.com <wa3gin@pop.mail.rcn.net>
To: <mike.foerster@home.com>
Sent: Thursday, August 10, 2000 9:30 PM
Subject: Re: [TowerTalk] Tower Base Technology


HI,

I have had three of these towers.  Going to put up one next month.  The
secret to solving the twist problem is to run black pipe from the base all
the way up to the top and up for the mast.  You  mount the rotor on the
concrete base where it is easy to maintain. Easy to lock down in storms,
easy to remove and replace , etc. In this scenario there is no twist moment
on the tower. The pipe and rotor take all of it as they are designed to do.
All the tower does is stand up. By removing the twisting you make the
installation straight forward and the tower will be up longer than you will
be alive, HAHA
On the concrete base you have to remember the vendor has to prescribe
something that in general works in almost every condition, the worst case
scenario.  Contact your local PE or Civil Eng. for guidance on what would
work for you...also remember that the guys that built this tower factored in
for numb nuts that would over load the tower with  twice the windload.
Typically I've seen installations where 4x4x4ft and 4x4x3ft deeep have been
used successfully.

Good luck,
dave



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