Max height in accordance with BS EN 12572 is 4.5m.
Quote from: GraemeA on July 22, 2019, 06:36:41 pmMax height in accordance with BS EN 12572 is 4.5m. Do you know if there is any rationale behind that height Graeme?
To that end - is there a standard "squidgy-ness" for bouldering walls (and in particular IFSC comp) mats?
height (m) 2 2.5 3 3.5 4 4.5 5speed (m/s) 6.26 7 7.67 8.28 8.85 9.39 9.9force (kJ) 1.372 1.715 2.058 2.401 2.744 3.087 3.343Calculated for an arbitrary mass of 70 kg.For comparison, the force of landing on the ground in a parachute landing is around 2-2.5 kJ, i.e. around 2.5-3m wall. But of course the ground is hard and you're not dropping straight down, so maybe not a useful comparison.
But you don’t fall that far, unless you fall whilst topping out; in which case the max height for a topout wall is 4mtrs.Your feet will be in the 2-3mtr above the mat range, unless you are under a meter tall (or heel hooking at the top, which would be pretty rare).
Being pedantic, but the force you state in your post is really the kinetic energy you need to dissipate on landing. The force your knees experience will vary massively depending on how much you bend you legs, how soft the mat is, if you are spotted etc.
8.2Design of boulders:A) each boulder shall be designed:1) so that the lowest part of the body should not be higher than three (3) meters above the safety matting;
I never been less surprised in my life. Female climbers who've been that skinny for that long should stick to roped climbing.Female athlete triad
From what I could see in the video, that mat could as well be made with concrete. She basically stops dead when landing.Usually the main concern with gym mats is not bottoming out, but firmness is a real issue, and I used to have a lot of problems with it.
Quote from: Nibile on July 23, 2019, 08:24:34 amFrom what I could see in the video, that mat could as well be made with concrete. She basically stops dead when landing.Usually the main concern with gym mats is not bottoming out, but firmness is a real issue, and I used to have a lot of problems with it.All the new bouldering walls in England have super firm mats. I assume there is a standard they are adhering to. I'm sure more could be done to improve mat technology, but I don't see much of a push for it - just the occasional grumble about knackered knees and ankles, which is offset by others saying "well I haven't hurt myself, what's the problem?"
Our mats are dual density as are all mats made by Holdz
Quote from: jwi on August 02, 2019, 09:54:38 amI never been less surprised in my life. Female climbers who've been that skinny for that long should stick to roped climbing.Female athlete triadThat might be a bit of a leap. A quick Google suggests that links between female athlete triad and ligament injuries are pretty minimal, and are more likely to be caused by overuse.https://www.researchgate.net/profile/Diane_Elliot/publication/43532358_Young_Womens_Anterior_Cruciate_Ligament_Injuries_An_Expanded_Model_and_Prevention_Paradigm/links/0f31752f687f636deb000000/Young-Womens-Anterior-Cruciate-Ligament-Injuries-An-Expanded-Model-and-Prevention-Paradigm.pdf
Max height in accordance with BS EN 12572 is 4.5m. I think our highest bit is 4.2m in main Works although I think we hit 4.5m in Unit E.
I'm always massively over cautious on last moves indoors and I generally down-climb to half height before jumping, if possible. My fear has always been that the mats are not soft enough to protect against soft tissue injury if joints hit at awkward angles from that height.
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