Looks like way too much weight for the crane jib, the crane operator definitely
was at fault because the LMI wouldn't have allowed him to do the pick if
everything was set up correctly.
Load Moment Indicator - it's a computer that all newer cranes have. The
operator has to program the crane configuration into it - outriggers extended
or half way, number of parts of winch line, load block or headache ball - the
computer knows the weights, jib configuration, etc. The computer knows the boom
angle and boom length , and calculates the weight and the load radius - the
amount of leverage from the boom.
The LMI won't allow you to get into a situation where the boom will fail or the
crane will tip over if it's set up properly.
Looking at the video, the crane is probably way underrated for the pick they
did.
Karl
WD9BGA
----- Original Message -----
From: Jeff DePolo (jd0@broadsci.com)
Date: 11/30/24 10:01
To: john@kk9a.com, towertalk@contesting.com
Subject: Re: [TowerTalk] Tower collapses as its built.
> The video short linked below from HamRadioClubLuzerneCoPA happened to
> pop up
> on my computer today.
I happen to be in Luzerne County PA right now, Kingston to be precise, at
the in-laws. That video has made its rounds through various emails, mailing
lists, web sites, etc.. I don't think it actually happened here in Luzerne
County...I probably would have heard about it when it happened.
To me it looks like a tower being taken down, not being put up, but hard to
say for sure.
--- Jeff WN3A
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