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Thread: Gondola cable snaps
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08-22-2019, 12:07 PM #501
Just discovered the Twitter feed for Rigging Specialties
https://twitter.com/RIGGINGYYC
Lots of eye candy.
Those guys really get around.
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08-22-2019, 12:11 PM #502
Just in. A letter to the editor in The Squamish Chief newspaper.
https://www.squamishchief.com/opinio...ge-1.23922901?
From someone self identified as "a mechanical engineer with 40-plus years specifying, designing, maintaining, and inspecting lifting equipment, including occasional forensic investigations."
As a mechanical engineer with 40-plus years specifying, designing, maintaining, and inspecting lifting equipment, including occasional forensic investigations, it amazes me that anyone could come up with such a quick conclusion that the rope may have been cut.
In fact, none of the evidence presented thus far would lead me in that direction.
Statements like the large diameter, or the mass per metre do not in any way point to sabotage.So, let’s not jump to conclusions about sabotage. Yes, continue that investigation, but please also look for what else could have caused it, since there are many other potential causes; the most likely would be a hidden defect in the rope itself. (This is why ropes used for lifting equipment often have a factor of safety of five or more, and even higher for elevator duty). Fatigue, jammed counter-weight, quality assurance, quality control, temperature changes, and design all need to be considered before a definitive conclusion can be reached.
https://fi2engineering.com/dfrykberg.html
Is he for real or is he just trolling me!
Quick! Can the dirty hands here please set him straight!
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08-22-2019, 12:22 PM #503Registered User
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- Mar 2019
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notice said expert says nothing about WIND.
So, let’s not jump to conclusions about sabotage. Yes, continue that investigation, but please also look for what else could have caused it, since there are many other potential causes; the most likely would be a hidden defect in the rope itself. (This is why ropes used for lifting equipment often have a factor of safety of five or more, and even higher for elevator duty). Fatigue, jammed counter-weight, quality assurance, quality control, temperature changes, and design all need to be considered before a definitive conclusion can be reached.
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08-22-2019, 12:23 PM #504Banned
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- Oct 2003
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- In Your Wife
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The only question left in my mind is why did PureGravity sabotage the Squamish Gondola?
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08-22-2019, 12:36 PM #505Registered User
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- Oct 2017
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Given that the general public has not seen the evidence, there is no way to guess whether the appraisal of sabotage was premature or correct.
There could be some used disks and Makita batteries laying at the base of the tower where the occurance happened.
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08-22-2019, 12:42 PM #506Registered User
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- Oct 2017
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- 181
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08-22-2019, 01:55 PM #507
re. that letter to the editor...
Kirby Brown The Squamish Chief The Editor does not publish every letter and uses their judgement to filter what they see as relevant for publication. To fuel speculation and present this letter as an experts opinion is clearly the editors choice in this matter. The RCMP have both cut ends of the rope and other confirming evidence that your reporting staff are aware of. Our Millwrights, Doppelmayr and other ropeway experts have had those cut ends in their hands. You cannot wash your hands of causing concern and confusion with your blanket statement above. This is irresponsible on your part Editor. I won’t comment further but, Squamish, know that you can trust me completely when I repeat; the line was cut through intentionally. Kirby Brown, General Manager of Sea to Sky Gondola (and very proud to be so).
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08-22-2019, 02:00 PM #508
Fucking Facts!
Ruin a poor theory.
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08-22-2019, 02:02 PM #509
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08-22-2019, 03:06 PM #510
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08-22-2019, 03:47 PM #511
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08-22-2019, 03:50 PM #512
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08-22-2019, 03:51 PM #513
fine, i did it. i admit it.
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08-22-2019, 03:53 PM #514
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08-22-2019, 03:53 PM #515
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08-22-2019, 06:47 PM #516
The Kicking Horse gondola was built in 2000. As per Kicking Horse rope replacement - https://twitter.com/RIGGINGYYC/statu...50741253996544
A few questions:
So then, would that have been the first time the rope was replaced in 19 years? Or would it have been done before?
After how many years or hours of service is a typical gondola system haul rope replaced?
Is there a limit to the number of hours/cycles a rope can be used in ski lift operations, or is it done when a specific set of wear criteria has been reached?
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08-22-2019, 07:21 PM #517
Just Stop!
www.apriliaforum.com
"If the road You followed brought you to this,of what use was the road"?
"I have no idea what I am talking about but would be happy to share my biased opinions as fact on the matter. "
Ottime
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08-22-2019, 07:34 PM #518
prob a bot^
or a tool box.
same.
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08-22-2019, 07:35 PM #519
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08-22-2019, 07:38 PM #520
i'm just trying to get into canada, i admit it.
ted, just admit it.
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08-22-2019, 07:53 PM #521
Until then, more interesting news
October 2009 - Steamboat Gondola haul rope replaced for 2nd time in 2 years
for the second time in two years, contractors are hustling to install a new 60-ton gondola haul rope at the ski area.
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did not expect to supervise installation of a new gondola rope for another 15 years or more. Crews at the ski area went through the process in November and December 2007 when they replaced the original rope after 20 years of service.
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However, Allen said, problems with the new rope were apparent from the beginning.
“We’ve had vibration issues ever since it was replaced,” he said. “The passengers in the cabins would not notice these vibrations ...
After two years of consultation with independent experts and negotiations with the manufacturer, Allen said, it has been determined that a subtle variation in the shape of the 2007 braided steel rope contributed to the vibration problems.
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“We didn’t see rapid sheave liner wear, but long term, you could expect it would add to fatigue,”
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The rope was manufactured by the Fatzer ... concluded that the difference between the lay of the 2007 rope and the original rope accounted for the undesirable vibration.
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The variation in the lay of the 2007 rope didn’t allow the pairs of sheaves, or wheels, at each gondola tower to absorb the energy that can cause vibration.
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“The lay of the (2007) rope was such that it pushed the sheaves down simultaneously,” Allen said. “All that energy was going right into the axle.”
I find that really interesting, that the lay of the rope could actually create other problems on the lift towers, with the axles on the sheaves.
December 2007 - The original replacement is mentioned here, as a need to fix a grip-rope issue from the original splice causing alarms to sound:
Significantly, the need to replace Steamboat’s gondola haul rope arose this fall because of irregularities in the original rope resulting from the “loose ends” that were tucked back into the old rope during installation 21 years ago.
Steamboat Vice President of Mountain Operations Doug Allen said the irregularities in the old rope did not create a safety issue but did cause “operational hassles.”
The loose wire strands that had been tucked back into the old rope had shifted over time. When one of the gondola cars happened to clamp onto one of the irregularities, it set off a safety alert. That required the gondola to be backed into the gondola building so the car could be re-attached at a different point on the rope. During the 2006-07 ski season, those events happened as often as three times a day.
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08-22-2019, 08:07 PM #522Registered User
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I want some of that pure sweet cocaine that PG has. Otherwise I have nothing else to add.
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08-22-2019, 08:08 PM #523
now i'm really afraid. thank you so much for all this updated information. i will be following this and posting to all my social media accounts your fascinating work.
please pm me your direct information so i can continue to help in these matters
thank you so much for this insightful insight, very incredible work on you team's part.
again thank you and blessed to see this updated information.
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08-22-2019, 08:12 PM #524
Flamingo-pink powder, baby.
It it amusing to observe the effort going into his engineering dabble.
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08-22-2019, 08:35 PM #525
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