For that you must read note 2 on drawing bb41300r6 "foundation material
specifications, installation notes and tolerances" that says "The purchaser
must verify that actual site soil parameters meet or exceed eia 'normal'
soil parameters and that the depth of standard foundations are adequate
based on the frost penetration and/or zone of seasonal moisture variation at
the site..."
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: Gary "Joe" Mayfield [mailto:gary_mayfield@hotmail.com]
> Sent: Sunday, January 17, 2010 03:41
> To: 'Tower and HF antenna construction topics.'
> Subject: Re: [TowerTalk] Guywires - changing to - Tower Base
>
> What do folks living where 4 feet down is marginal (due to freezing), do
> with these numbers?
>
> I would not put a water line in here at any depth less than 6 feet.
>
> Is 4 feet deep enough for my tower base if that is what the book on the
> tower says?
>
> 73,
> Joe kk0sd
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of K1TTT
> Sent: Saturday, January 16, 2010 2:34 PM
> To: 'Tower and HF antenna construction topics.'
> Subject: Re: [TowerTalk] Guywires
>
> If you really want facts, the rohn catalog calls for a 2'6"x2'6'x4' base
> for
> 180' of 55g. but a 64' bx series rohn tower calls for a 5'9"x5'9"x4'
> base.
>
>
> David Robbins K1TTT
> e-mail: mailto:k1ttt@arrl.net
> web: http://www.k1ttt.net
> AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
>
>
> > -----Original Message-----
> > From: Michael Ryan [mailto:mryan001@tampabay.rr.com]
> > Sent: Saturday, January 16, 2010 20:13
> > To: 'Tower and HF antenna construction topics.'
> > Subject: Re: [TowerTalk] Guywires
> >
> > This thread just keeps getting better and better...very
> entertaining...not
> > very factual....but entertaining...pass the popcorn. - Mike
> >
> > -----Original Message-----
> > From: towertalk-bounces@contesting.com
> > [mailto:towertalk-bounces@contesting.com] On Behalf Of K1TTT
> > Sent: Saturday, January 16, 2010 2:41 PM
> > To: 'Tower and HF antenna construction topics.'
> > Subject: Re: [TowerTalk] Guywires
> >
> > > Now maybe someone will address the massive concrete bases recommended
> in
> > > the
> > > catalogs? I maintain that if the tower is held vertical by the guys
> > there
> > > is near zero horizontal reaction at the base and all we need is enough
> > > base
> > > AREA to keep the thing from sinking, plus enough horizontal restraint
> to
> > > handle the windload on the tower between the ground and the first
> guys,
> > > which isn't much. There is no overturning moment at all.
> >
> > Guyed towers have relatively small bases, my 180' rohn 55 base is only
> > 4'x4'x5'. Self supporting towers have much bigger base requirements.
> >
> > David Robbins K1TTT
> > e-mail: mailto:k1ttt@arrl.net
> > web: http://www.k1ttt.net
> > AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> >
> >
> >
> >
> > _______________________________________________
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