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Re: [TowerTalk] My first tower section is not plumb...

To: Steve Maki <lists@oakcom.org>, "towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] My first tower section is not plumb...
From: Wayne Kline <w3ea@hotmail.com>
Date: Fri, 12 Feb 2016 14:50:02 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
 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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