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## Re: [TowerTalk] man lift tips over

 To: sarnett@info-ed.com Re: [TowerTalk] man lift tips over "Roger (K8RI)" Wed, 14 Oct 2009 04:24:13 -0400 mailto:towertalk@contesting.com>
 ```It's a set of levers. If the wheel that fell through is 10' from the center of the lift and the boom is 100 feet that is a 10: ratio. If the tire dropped 6" then that's a movement of 60 (5') inches at the top of the mast. In a top heavy rig that is one whale of a lot of momentum. If it dropped 12" then that is a 10' swing. OTOH The center is raised several feet off the ground increasing the leverage so it'd be even more. 73 Roger (K8RI) Scottie Arnett wrote: > Not trying to be a butt! But it is all Pythagorean theorem > (http://en.wikipedia.org/wiki/Pythagorean_theorem) or a^2 + b^2 = C^2. Of > course A, B, and C should be considered in the lift equations. > > Scott > > ---------- Original Message ---------------------------------- > From: "Marlon K. Schafer" > Date: Tue, 13 Oct 2009 07:52:59 -0700 > > >> Yeah, I'd have to totally agree with this. Moving them, especially the big >> ones, is just too dangerous. >> >> I don't have the math on me right now, but even a little 6" drop on a wheel >> translate to a HUGE movement (probably in a bad direction) 80 or 100' out. >> marlon >> >> ----- Original Message ----- >> From: "Marc Willis" <7g7mburo@gmail.com> >> To: "Roger (K8RI)" >> Cc: "Eugene Jensen" ; >> Sent: Tuesday, October 13, 2009 7:43 AM >> Subject: Re: [TowerTalk] man lift tips over >> >> >> >>> Roger - That is right 'Move into place and then extend it.' I just put my >>> tower and antenna system up safely with an 80' man lift and it was >>> awesome. >>> This is the 3rd time I have used this method and it is wonderful. Rule of >>> thumb 'move it and then extend'. Cheers and 73 Marc NC7M >>> >>> On Mon, Oct 12, 2009 at 11:15 PM, Roger (K8RI) >>> wrote: >>> >>> >>>> Eugene Jensen wrote: >>>> >>>>> OSHA will have a field day with this and my thought to the man family. >>>>> I >>>>> >>>>> >>>> One of the first things we were taught was to never move the base with >>>> the boom extended up. That gives it a very high center of gravity. >>>> >>>> The story is a bit misleading as it is more of a case of the one wheel >>>> "falling through" an access cover than "running over" which gives the >>>> impression the other side was raised.. It may have dropped only a few >>>> inches, but with an arm that long raised that is one whale of a lot of >>>> leverage and momentum. And yes, I'm speaking from the experience of >>>> rolling one over on it's side. >>>> >>>> 73 >>>> >>>> Roger (K8RI) >>>> >>>>> just had my refresher class on these class machine's and interesting >>>>> one >>>>> point the instructor keep going over way walking the pass of the >>>>> machine. >>>>> Think about how these are used and they spend a lot of their time on >>>>> work >>>>> site with soft earth. So cave in is number 1 way for a collapse of >>>>> these >>>>> very heavy machines. 73 Gene K2QWD >>>>> >>>>> >>>> Roll over...yes, they are easily rolled, but collapse. I've never seen >>>> one collapse yet although I'm sure it's happened.. >>>> >>>> 73 >>>> >>>> Roger >>>> >>>> >>>>> -----Original Message----- >>>>> From: towertalk-bounces@contesting.com >>>>> [mailto:towertalk-bounces@contesting.com] On Behalf Of Gregg Seidl >>>>> Sent: Monday, October 12, 2009 11:05 PM >>>>> To: TowerTalk@contesting.com >>>>> Subject: Re: [TowerTalk] man lift tips over >>>>> >>>>> How weird is that. It does say in the instruction manual to be aware of >>>>> >>>> what >>>> >>>>> you are driving over. Yes I read it before I went up with it. It says >>>>> >>>> that >>>> >>>>> shallow buried pipes,water tanks, septic systems can all give way due >>>>> to >>>>> >>>> the >>>> >>>>> weight of the lift. Gotta pay attention when doing nearly anything >>>>> today,death is just around the next oversight. >>>>> >>>>> Gregg K9KL >>>>> >>>>> >>>>> _______________________________________________ >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> TowerTalk mailing list >>>>> TowerTalk@contesting.com >>>>> http://lists.contesting.com/mailman/listinfo/towertalk >>>>> >>>>> _______________________________________________ >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> TowerTalk mailing list >>>>> TowerTalk@contesting.com >>>>> http://lists.contesting.com/mailman/listinfo/towertalk >>>>> >>>>> >>>>> >>>> _______________________________________________ >>>> >>>> >>>> >>>> _______________________________________________ >>>> TowerTalk mailing list >>>> TowerTalk@contesting.com >>>> http://lists.contesting.com/mailman/listinfo/towertalk >>>> >>>> >>> _______________________________________________ >>> >>> >>> >>> _______________________________________________ >>> TowerTalk mailing list >>> TowerTalk@contesting.com >>> http://lists.contesting.com/mailman/listinfo/towertalk >>> >> _______________________________________________ >> >> >> >> _______________________________________________ >> TowerTalk mailing list >> TowerTalk@contesting.com >> http://lists.contesting.com/mailman/listinfo/towertalk >> --- >> [This E-mail scanned for viruses by Declude Virus] >> >> >> > > Wireless High Speed Broadband service from Info-Ed, Inc. as low as \$30.00/mth. > Check out www.info-ed.com/wireless.html for information. > _______________________________________________ > > > > _______________________________________________ > TowerTalk mailing list > TowerTalk@contesting.com > http://lists.contesting.com/mailman/listinfo/towertalk > > _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk ```
 Current Thread Re: [TowerTalk] man lift tips over, Gregg Seidl Re: [TowerTalk] man lift tips over, Eugene Jensen Re: [TowerTalk] man lift tips over, Roger (K8RI) Re: [TowerTalk] man lift tips over, Marc Willis Re: [TowerTalk] man lift tips over, Marlon K. Schafer Re: [TowerTalk] man lift tips over, jimlux Re: [TowerTalk] man lift tips over, Scottie Arnett Re: [TowerTalk] man lift tips over, Roger (K8RI) <=