[SML] Ringling Brothers Accident

[Dale Farmer]

The thing looks like it splits in half for travel, so putting all six onto a single ring would not work.  
If they had put a pear ring that was then connected via individual shackles to the other pear rings, that would put the side loading onto a device designed for it.  Then the added pear ring connects to the vertical stuff via carabiner or whatever.  
I'm still a little dubious about suspending the entire apparatus plus 8 dancers dancing onto a single carabiner.  In my mind carabiners are for holding up a couple of people at most.   Dynamic loading of bodies in motion quickly adds up to really big numbers.  I'd want to run the math very carefully on those dynamic loads, and put in additional safety margins for the unexpected events that inevitably happen.  Like them changing the choreography to something that matches a resonant frequency in the system.    --Dale

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-------- Original message --------
From: Blackfaer via Stagecraft <stagecraft at theatrical.net> 
Date: 07/08/2016  14:30  (GMT-05:00) 
To: Stagecraft Mailing List <stagecraft at theatrical.net> 
Cc: Blackfaer <blackfaer at gmail.com> 
Subject: Re: [SML] Ringling Brothers Accident 

Great link, looks like the tri-axial loading of a caribeaner was the problem. Not being a rigger, my thought was that should have been a shackle at that point instead of a beaner, right?Sent from my iPhoneOn Jul 5, 2016, at 4:33 PM, Ray Gibson via Stagecraft <stagecraft at theatrical.net> wrote:I guess this has been around for some time now, but hadn't made its way to the SML. The OSHA report on this incident was published on their website and may be of interest to many of the SML readers:https://www.osha.gov/doc/engineering/2014_r_05.htmlIt's dated October 2014 but I think only made its way to the Internet in the last few months.RayOn Sun, May 4, 2014 at 11:16 AM, Ryan Mutton <ryan.mutton at gmail.com> wrote:For info, archives & UNSUBSCRIBE, see <http://stagecraft.theprices.net/> - Happened an hour or two ago. 8 girls women dropped during the "Human Chandelier" Brief article: http://www.nydailynews.com/news/national/ringling-brothers-performers-injured-aerial-act-report-article-1.1779060 Video from the above article: https://www.youtube.com/watch?v=j3CfEbvFpjM I've got a friend out with another unit, this one was the Blue Unit. rdm - Ryan Mutton ____________________________________________________________For list information see <http://stagecraft.theprices.net/>Stagecraft mailing listStagecraft at theatrical.nethttp://theatrical.net/mailman/listinfo/stagecraft_theatrical.net
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