I use partial tower sections because there is a ready free supply from hams
who have had towers collapse. I also would feel more comfortable at the top
of the first few sections before the first set of guys go on. Otherwise, I
like the idea.
Chuck W5PR
On Tue, Dec 16, 2014 at 6:17 PM, James Wolf <jbwolf@comcast.net> wrote:
>
> Gentlemen,
>
> I'm baffled that so many of us put part of a tower in the cement base when
> installing a guyed tower.
> I know I've said it here before, but on most guyed towers, why not use a
> simple roof mount? Put threaded rods in the cement that rise enough to
> bolt
> to the roof mount so it won't turn or twist.
>
> Reasons to consider this:
>
> - No drainage to worry about in the tower section below ground level.
> - Weep holes should be or can be made in the roof mount where they can be
> easily inspected and cleaned out.
> - You are not locked into changing to a different tower later in life -
> assuming the cement base will handle it.
> - You don't have to worry about getting the tower section in the cement
> exactly vertical.
> - For those who worry about lightning cracking the base, there would be a
> lot less chance of it. [maybe an old wives tale by now].
> - It's probably less expensive.
> - It's certainly simpler.
>
> I installed my 120 ft. of Rohn 45 with a roof mount 25 years ago and I've
> seen no issues.
>
> Can anyone provide a good reason not use a roof mount for these
> installations? I would be very interested.
>
> Jim - KR9U
>
>
>
> ___________________
>
> On Tue,12/16/2014 9:27 AM, Kent Olsen wrote:
> > What do you do in the bottom where the rebar sits on the dirt? Is this
> just a sacrificial bit?
>
> A layer of gravel at the bottom of the hole. If you put the bottom section
> of the tower into the concrete pour as many of us do, the layer of gravel
> is
> important for another reason -- it provides drainage for water that comes
> down the legs of the tower.
>
>
> _______________________________________________
>
>
>
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