[TowerTalk] Tower collapses as its built.

[john at kk9a.com]

Most towers are bolted together by flanges so there is nothing to get jammed once the bolts are removed.  The top portion is clearly free from the remaining tower but I suppose a guy wire could still be attached.

John KK9A
 

Ken WA8JXM wrote:

Which seems to me that the sections did not separate as expected and the
crane tried to lift the entire tower, including the lower anchored and
guyed sections, and failed.  Whether  they missed removing a bolt or the
sections were jammed, either way, they did not separate until the crane
failed.

Ken WA8JXM

On Sun, Dec 1, 2024 at 4:12 PM <maflukey at gmail.com> wrote:

> If the video is advanced frame-by-frame at about 7 to 8 seconds the jib
> can be seen to deflect downwards continuously until failure occurs.   If
> the strap broke first, the jib reaction prior to failure would have been
> upwards in the opposite direction due to the instant release of bending
> tension.   The full counter-reaction of the boom goes off screen at about 9
> seconds as the camera follows the fall of the tower section, but reappears
> at 11 to 13 seconds when reverse curvature of the boom from the
> counter-reaction is visible through the first boom oscillation.
>
> Matt
> KM5VI
>
> -----Original Message-----
> From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of Fernando
> Semiao
> Sent: Sunday, December 1, 2024 4:55 AM
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] Tower collapses as its built.
>
>
> Sorry you are very wrong, was you there? It was the choke strap that give
> away., don,t ask me how i know....Its very sad you ham's keep inventing
> crap no wonder hams have a bad name. You and allot of hams folks see shit
> on this video.... thats what you seen  Oh sorry tomorrow its the hole crane
> fell sideways.
>
>
> On 11/30/2024 3:34 PM, Jim W7RY wrote:
> > Heck with the strap....
> > n
> > The entire TOP JIB broke in two.
> >
> > Jim W7RY
> >
> >
> > On 11/30/2024 1:08 PM, Steve Jones wrote:
> >> Looks like the cable was not attached to the tower properly.  I think
> >> I could see the strap around the upper section break.
> >> 73,
> >> Steve
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of
> >> john at kk9a.com
> >> Sent: Thursday, November 28, 2024 9:25 PM
> >> To: towertalk at contesting.com
> >> Subject: [TowerTalk] Tower collapses as its built.
> >>
> >> The video short linked below from HamRadioClubLuzerneCoPA happened to
> >> pop up on my computer today.  That installation became very
> >> dangerous. I wonder if anyone knows the details?  Hopefully there
> >> were no injuries.
> >>
> >> https://www.youtube.com/shorts/Gm-bq3ynSuU
> >>
> >> John KK9A
> >>
> >>
>
>
>
> _______________________________________________
>
>
>
> _______________________________________________