[TowerTalk] Which tower base?

[Stan or Patricia Griffiths]

Hi Dan,

I am not aware of any base you can bury in concrete that will be compatible with
more than one size of tower.  As you suggest, you could put some J bolts in the
concrete and drill just about any flat base to fit the J bolt pattern.  That may
be the best answer for you.

Having the guy points out farther than necessary is actually a good idea.  It
means you can always add tower sections later without redoing the guy points.
It also means you will have more guy clearance if you decide to sidemount some
antennas lower down on the tower in the future.

Stan
w7ni@teleport.com

Dan Levin wrote:

> I am planning, at some point later next year, to install a tower at my new
> vacation QTH.  This winter, there is going to be a construction crew on site
> with a backhoe and a concrete pumper.  So it seems like it would be a good
> idea to put in a tower base while they are there...
>
> I think that I will probably put in Rohn 55G, with 45G a backup possibility.
> I realize that most folks bury a short section in the concrete, but if I do
> that I will be bound to one type of tower, right?  I'd rather not decide
> yet.  Is there a base that I can put in that will support either tower type?
> I'm not worried about the amount of concrete, rebar, etc.  I can overkill
> that easily enough.  I am more worried about the metal part of the base -
> does Rohn make something that mounts on a set of J bolts the way most
> crank-ups do, or some other base mounting system that would allow me to put
> in a bolt or two or three and decide on my tower type later?
>
> Also, since I don't plan to put in more than 150' of tower, I am thinking
> about pouring guy anchors 120' feet away from the base.  If I later decide
> to put in a shorter tower (say 90'), is having the guy anchors at 120' going
> to be a problem (other than the extra cost of the EHS, which I can deal
> with)?
>
> Thanks much as usual,
>
>             ***dan, K6IF (ex. N6BZA)
>
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