Timeline for Is clipping onto the rungs of a via ferrata bad practice?
Current License: CC BY-SA 4.0
10 events
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| Jul 23, 2018 at 19:05 | comment | added | Michael Borgwardt | @Adonalsium: it probably would be, although those those shock absorbers behave decidedly non-proportional and the danger results from deceleration rather than force, which is not the same. The certification is actually only for climbers with a weight between 40 and 120kg, and they are dangerous for climbers lighter than that as well as heavier, since a lower force from a very light climber may not rip open the stiching and result in higher deceleration. | |
| Jul 23, 2018 at 17:18 | comment | added | Monica Apologists Get Out | @imsodin A double length fall would be more than 2x force, I think, given that gravity is a force of acceleration? I'm not physicist so please, anyone is free to point out why I'm wrong. | |
| Jul 19, 2018 at 11:02 | comment | added | Michael Borgwardt | @imsodin: hm, looks like I overestimated what those absorbers can do. I changed the wording. | |
| Jul 19, 2018 at 11:00 | history | edited | Michael Borgwardt | CC BY-SA 4.0 |
added 114 characters in body
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| Jul 19, 2018 at 9:36 | comment | added | imsodin | I'd like to see some kind of reference (norm, manufacturer advice, tests, ...) for the statement that a 10m fall into a via ferrata set should not result in serious injury. The norm tests for 5m fall and requires <6kN max force for 120kg - 6kN is crazy already, 12kN would be really bad (obviously a huge leap to assume double energy means double peak force, but I don't think its unreasonable). And that's all assuming you are falling in "empty space" - conceptually that means either diagonal and slightly overhanging or steeply overhanging. I doubt those conditions are the "norm" on via ferratas. | |
| Jul 18, 2018 at 14:17 | history | edited | Toby Speight | CC BY-SA 4.0 |
Fixed some typos
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| Jul 18, 2018 at 12:22 | comment | added | fgysin | You are right of course. I merely wanted to point out that it might not be easy to find such well-designed Via Ferrata. | |
| Jul 18, 2018 at 10:37 | comment | added | Michael Borgwardt | @fgysin: famous and beautiful is not the same thing as well-designed from a security standpoint. And in most cases it wouldn't be a problem to add cable anchors to catch a fall sooner above a ledge. | |
| Jul 18, 2018 at 9:28 | comment | added | fgysin |
I agree, except for a well-designed via ferrata should not have[...] I have been on some of the most famous and beautiful Via Ferrata in Switzerland - and many still have passages where a fall would almost certainly lead to grave injuries. Falling on a Via Ferrata is just not an option, not as it is in rock climbing.
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| Jul 18, 2018 at 8:11 | history | answered | Michael Borgwardt | CC BY-SA 4.0 |