FW: [TowerTalk] Rohn tower base with pier pin question

[David Robbins K1TTT]

> -----Original Message-----
> From: towertalk-bounces at contesting.com [mailto:towertalk-
> bounces at contesting.com] On Behalf Of K7LXC at aol.com
> Sent: Saturday, May 22, 2004 16:43
> To: sentek at sprintmail.com; Towertalk at contesting.com
> Subject: Re: [TowerTalk] Rohn tower base with pier pin question
> 
> In a message dated 5/21/04 7:54:02 AM Pacific Daylight Time,
> sentek at sprintmail.com writes:
> 
> > In the past, I've erected Rohn 25 towers with a section embedded in
the
> >  concrete.  This time, I'm looking at the pier pin approach.  So
far,
> I've
> >  found references to descriptions of drilling the base concrete and
> >  installing a pin using stainless steel expanding anchors or epoxy.
> Seems
> to
> >  me the easy way would have been to put the pin in when the concrete
is
> being
> >  poured.  You ought to be able to simply push it down where you want
it,
> with
> >  a few taps from a hammer.  Is that what's commonly done?
> 
>     Yep. The pin is just there to keep the bottom of the tower from
> kicking
> out so it doesn't have to be real plumb or anything.
> 
>     If the concrete is already dried, it's about a 5-minute job to
drill a
> hole and then epoxy the pin in. Either way is pretty simple.
> 
>     The big hassle with a pier pin is that you have to temporarily guy
the
> first section.
> 

I hate working on rope guyed tower like that... it seems easier to me to
assemble the first 3 sections with guy wires attached and stand them up
field day style then set them on the pin.  30' of rohn 25 can be stood
up by 3 or 4 people fairly easily and can be easily lifted to set on the
pin.  Tighten the guys and you are set to begin regular construction
with the gin pole from there up on a solid base.



David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net