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Thread: Gondola cable snaps
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08-12-2019, 11:22 AM #126
It’s amazing how much spare time everyone has
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08-12-2019, 11:25 AM #127
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08-12-2019, 11:32 AM #128
The plastic core of the rope would also melt at a much lower temp than the metal braid. I have no idea how much losing the core would compromise the integrity of the rope and how much of the safety rating is based on an intact core.
Aim for the chopping block. If you aim for the wood, you will have nothing. Aim past the wood, aim through the wood.
http://tim-kirchoff.pixels.com/
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08-12-2019, 11:36 AM #129
Me too
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08-12-2019, 11:40 AM #130Registered User
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I actualy haven't been up there in 20 + yars when you had to hike up and it wasnt so busy in fact there was nobody else up there it was a warm bluebird day, some good exercise got the blood circulating
so speaking of explosive events the wife was feeling randy
I assume it would be so busy up there I doubt you could pull that ^^ off nowLee Lau - xxx-er is the laziest Asian canuck I know
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08-12-2019, 11:42 AM #131
That cable didn't stand a chance.
RCMP just posted a picture of the perp.
"timberridge is terminally vapid" -- a fortune cookie in Yueyang
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08-12-2019, 11:48 AM #132Registered User
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If you Google wire rope safety factors or wire rope inspections, you can really geek out on some of this stuff, including failure modes and how many strands of a wire rope need to be damaged in one area before it must be replaced.
Regardless, what I was able to find suggests that 8 is a normal minimum safety factor when hoisting people in industrial applications (c.f. Table D-3, https://www.usbr.gov/ssle/safety/RSHS/appD.pdf p. D-7)—that's a U.S. government doc that lists various wire rope safety factors, including "7-12" for "power passenger and freight elevators", 8.9 for the hoist rope on a "rope guided workman hoist", 8-11 for "personnel hoists".
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08-12-2019, 11:56 AM #133Registered User
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Normal crane hoisting wire rope has a safety factor of five. In fact, although it doesn't apply here, elevator ropes required safety factor decreases with length because of the gross weight of the rope. This is typically only an issue in places like mines where the drop could approach a mile.
Safety factor of cranes wire ropes. For example:
(E) The operating design factor for the boom hoist reeving system must be not less than five.
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08-12-2019, 12:06 PM #134Registered User
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08-12-2019, 12:14 PM #135Registered User
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08-12-2019, 12:24 PM #136
I’ll go out on a limb and say that’s nuts!
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08-12-2019, 12:40 PM #137
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08-12-2019, 01:08 PM #138Registered User
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08-12-2019, 01:14 PM #139
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08-12-2019, 01:43 PM #140
Cable and rope systems have high safety factors to account for unanticipated shock loads not usually encountered in buildings. If you build it to stand up to 8x the dynamic loading expected in the worst weather under a full load, then if you have something unpredicted, like the cable coming off the sheaves, the cable doesn't fail, thus you see crazy events where the cable literally holds up failed lift towers.
I don't engineer lifts. But the principles are similar for professional rope rescue systems.Originally Posted by blurred
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08-12-2019, 01:52 PM #141Registered User
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Your self hatred of your Americanism is showing thru, Kshama
https://www.telegraph.co.uk/women/li...en-in-speedos/Last edited by Rock Knocker; 08-12-2019 at 03:48 PM.
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08-12-2019, 02:12 PM #142Registered User
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08-12-2019, 02:38 PM #143Registered User
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so a squirrel is really just a rat with a good publicist
https://www.cbc.ca/news/canada/briti...date-1.5244316
the cops are saying it was defintely cut, the cable & 20 of 30 cars will have to be replacedLee Lau - xxx-er is the laziest Asian canuck I know
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08-12-2019, 02:56 PM #144
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08-12-2019, 03:22 PM #145Skiing powder worldwide
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that is pretty fucked up. You think it was an environmental group? And they must know how it was cut by the cable. I am sure they wont disclose that.
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08-12-2019, 03:45 PM #146Registered User
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The RCMP have said the cable was definitely cut. They haven’t given details about just how it was cut yet.
https://www.cbc.ca/news/canada/briti...alls-1.5242787
In that article, one of the RCMP inspectors is quoted as saying the perp put himself in extreme danger when cutting the rope, which could imply that they think the rope was cut by someone right there, in which case a cutting disk or torch could be the likely way to do it. Not sure how completely informed this “inspector” is, though. Might be a public relations hack who doesn’t know all the details, or perhaps they are deliberately muddying the waters. Guess we’ll find out eventually.
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08-12-2019, 03:47 PM #147
Battery power
“I have a responsibility to not be intimidated and bullied by low life losers who abuse what little power is granted to them as ski patrollers.”
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08-12-2019, 03:52 PM #148Registered User
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One of the witnesses said the first bang they heard sounded like a gunshot. Then a bunch more louder bangs.
What would happen if someone shot the cable?
... I saw it done once in a western movie when I was a kid.
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08-12-2019, 03:56 PM #149
The cable snapping probably made a bang like a gunshot... or a coulda been a cutting charge.
Gondola cabins hitting the ground make loud bangs.Originally Posted by blurred
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08-12-2019, 05:19 PM #150
rumour mill is saying angle grinder, a tower mid span where it trends back down so rope went either direction from tower, and allegedly some very useless video was taken from afar...security apparently heard something happening and then watched it collapse
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