WOW .... this is getting over thought IMO.. it's a 40 ft/ tower not a watch
with one level of guys.... PUT it up attach the guys and adjust there tension
to plumb the tower
install the top section ( I am assuming your attaching the guys @ the 30' level
)
install the last section antennas ect and HAVE FUN
Wayne W3EA
> To: towertalk@contesting.com
> From: lists@oakcom.org
> Date: Thu, 11 Feb 2016 23:43:06 -0500
> Subject: Re: [TowerTalk] My first tower section is not plumb...
>
> Douglas,
>
> Oh boy, at the risk of getting all the engineers and lawyers and
> would-be's in a dander, I'll suggest this - with the caveats that I
> don't really know what kind of tower sections you have other than your
> description that it's equivalent to Rohn 25. And I don't know whether
> you have an informed inherent feel for how much lateral stress your
> tower can handle.
>
> But if I had 30' of *guyed* Rohn 25 sticking out of 1/2 cu. yd of
> concrete at a slight angle and for some reason absolutely needed to make
> it plumb, I'd do this:
>
> 1) I'd rig up a ratchet binder (come-along) or 2 in the appropriate
> direction(s) attached to to the top of the bottom section (10' or 15'
> up) and anchored out to solid attachment point(s).
>
> 2) I'd dig out all the way around the foundation.
>
> 3) I'd loosen the guy(s) in the direction(s) the tower is leaning.
>
> 4) I'd tighten the ratchet binder(s) to plumb the tower.
>
> 5) The best back-fill would be additional concrete all around. A
> *little* soupy would be best so it under-fills any new gap under the base.
>
> 6) Of course leave the ratchet binders in place and the loosened guys
> loosened until the new concrete is well set.
>
> If your existing concrete is something like 2' x 2' x 3' deep, this
> should work. If it's a lot bigger or wider, it will be more of a problem.
>
> Note: Personally I wouldn't worry about a little lean, but everyone has
> their own priorities.
>
> Best,
>
> -Steve K8LX
>
> On 2/11/2016 6:51 PM, Douglas Ruz (CO8DM) wrote:
>
> > Hi,
> >
> > I have been thinking and I am really want my tower straight and plumb.
> >
> > I am considering digging out some side of the base to adjust the tower
> > level.
> >
> > Any tips or thoughts ???
> >
> > Can I just digging 2 sides or all 4 sides of tower bease???
> >
> > About backfilling...what is the best add concrete again for backfilling???
> >
> > what is the best method to move the base to adjust the level ??...it is
> > about 2000 pounds base.
> >
> > Thanks in advance,
> >
> > 73....Douglas, CO8DM
>
> >> If your tower is the equivalent of R25, and only 30', there's not much
> >> you can do to it to really overstress it, unless you try real hard.
> >>
> >> But if you really want it straight AND plumb, consider digging out the
> >> appropriate side of the foundation and letting the the concrete adjust
> >> itself, and then backfilling it back in.
> >>
> >> At that point it will become what you want it to be, merely an
> >> anti-sink device.
> >>
> >> -Steve K8LX
>
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>
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