Cave Anchors Made Out Of Dyneema??? 

Glad someone calls out his weird pronunciation of kilonewtons

@@jdecicco91 um I think you mean “kilanewtints”

The overhand loop on top would be interesting to see tested...

Je comprends pas "we don't keep the loop close" Si tu peux m'expliquer 😅

​@@truc2fou915 la boucle de l'AS n'est pas continuellement fermé comme dans la video. Noeud différents et plus versatile

I got into caving a year ago, going from a 15 year background of rock, ice and alpine climbing, so these spit bolts and the hangers for them a completely new thing for me which I didn't notice for the first time untill I went caving in Belgium again last weekend, where I saw a cluster of 4 spit bolts in multiple caves. It made me wonder why they didn't just use a set of 2 regular bolts with eyes on them, the cost can't be that different, so any idea why spit bolts are used in caving at all over the more regular type of bolts you find in rock climbing?

@@pieterveenders9793 Hi, The history made that we used autodrill (maybe wrong translation) spit bold because we were able to put them we used a hammer and a "STROKER". I was when drillhammer with battery didn't exit. So today we keep using similar spit bold but in inox steel. The reason it's that you use the same equipment has before and you are bringing your own plate-anchor. So it cannot be destroy by a flood and you now exactly how it's behind the srew. Sometimes you will found many spit bold because : -first explorer put them really close to the floor (they were using ladder) - it'sreascue equipment - the spit bold tapping is too old and you need to put a new one - or just people try to say i am the best one and my bold is at a better place Today when we can we prefer to put drill anchor, like an abalakov in ice climbing. And for rescue we use Petzl Pulse in 8mm. link to the spit bold : www.raumerclimbing.com/en/products/classic/tap-and-rainox/ Some link in french about the equipment of cavities : www.csr-bfc.fr/rc_images/EFS11.pdf and about the use of light technique : efs.ffspeleo.fr/images/les_cahiers_de_l_efs_n_14_utilisation_des_techniques_l_g_res_en_sp_l_ologie.pdf

tu penses que la dyneema en manille textile de la vidéo fait combien de mm de diamètre ?

i would probably machine those nuts to have a nice radia, and not just 2 sharp through holes...

@@joergengeerds360 Yea like nuts, I wonder if they could be cast with a nice smooth geometry but I wonder if there's enough demand vs just machining them. thinking of the cheapest ways to machine it, maybe just a big fillet on the holes.

A sheeve from a pulley inside a bit of square tubing to prevent the rope from coming off the sheeve could be done without any custom machining.

Now the troll bollards, they had a really small footprint and they shifted the rope away from the wall, its a pity no one has manufactured one for 40 years. I suspect they were discontinued because the 'rules' required hangers that could be clipped into (I have never needed to, or felt it necessary to do this) but i realise it is a requirement in the standards.

Hi Stephen, this is John from the video. The manufacturer of the 5mm cord, Beal, recommends a triple fisherman's. Their recommendation is specific to the double braided cord.

@@jfioroni Thank you very much John.

This is John from the video. Its a triple fisherman's knot.

triple fisherman, manufacturer recommended.

Thanks

@@jfioroni Hey John, you seem cool AF. Glad you're doing what you're doing

Most of the things we broke that came out of caves broke lower than new even though they are not exposed to UV. Dirty grinding in the fibers is my guess or just age itself. I've also lead climbed in a cave during an exploration project so there are rare instances one could take a whipper, but that is irrelevant for the uses of these anchors.

@@HowNOT2 Aid climbs and traverses are where falls most likely happen. Very rarely we have a bolt blow out, like happened to us in Lost Creek Siphon, where you end up popping a bolt and shock loading the rebelay above.