[TowerTalk] Tower Collapse - New Kensington, PA @ K3MJW

[Pete Smith]

I wasn't suggesting that the old tower wasn't less strong than Rohn 25.  My 
point was that with a guy gone, or alternatively with it having been pulled 
on by a falling tree, in 70 mph+ gusts I'd expect my tower to fail 
similarly.  There are some things nobody can reasonably design for.

73, Pete N4ZR

At 02:37 PM 2/19/2009, Roger (K8RI) wrote:


>Pete Smith wrote:
> > I don't agree - my Rohn 25 would almost certainly fold just like that,
> > above the second guy station, if the wrong top guy failed in a high wind,
> > and it is well within ratings.
> >
>
>If you've ever seen the ROHN add showing the weights applied to two
>towers demonstrating the lateral strength, your 25G is also considerably
>stronger than the old American Steel towers in the lateral direction.
>
>But as others have said, something landing on a guy and a guy breaking
>is something few towers can handle. The old AS towers used a single
>horizontal brace every two feet.  The 25G uses horizontal braces about
>16 apart plus diagonal graces.  The AS is "springy" and really needs
>additional guys more closely spaced the way they are generally used.
>
>73
>
>Roger (K8RI)
> > 73, Pete N4ZR
> >
> > At 10:10 PM 2/18/2009, WA3GIN wrote:
> >
> >> Hmmm,
> >>
> >> Doesn't look like that tower was spec'd to go 100ft, esp. with the 
> number of
> >> antennas attached.
> >>
> >> Better Luck Next Time,
> >> wa3gin
> >>
> >> ----- Original Message -----
> >> From: "Charles Mills" <w3yni1 at gmail.com>
> >> To: "Towertalk" <towertalk at contesting.com>
> >> Sent: Wednesday, February 18, 2009 9:09 PM
> >> Subject: [TowerTalk] Tower Collapse - New Kensington, PA @ K3MJW
> >>
> >>
> >>
> >>> http://www.flickr.com/photos/11829197@N06/3291969262/
> >>>
> >>>
> >> _______________________________________________
> >>
> >>
> >>
> >> _______________________________________________
> >> TowerTalk mailing list
> >> TowerTalk at contesting.com
> >> http://lists.contesting.com/mailman/listinfo/towertalk
> >>
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk at contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
> >
>_______________________________________________
>
>
>
>_______________________________________________
>TowerTalk mailing list
>TowerTalk at contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk