This puts us in a really strong position to continue to support anchor installations and replacements for the immediate future, which is really exciting. We'll be reporting more details in due course (including how you can help us) so keep an eye on our news page, here on UKCaving, or follow us on Facebook.
That's all sounding great, thank you Matt.
Simon Wilson said:
Do you mean the routine inspection that the user does?
Yes.
Using Spits on expeditions is a very different thing to using them in the Dales.
I recognise that, hence my careful phrasing! To spell out the argument I was making:
[list type=decimal]
[*]Resin anchors are much more reliable than spits
[*]Even spits have proven to be very reliable in the context of less high-traffic caves (e.g. expeditions)
[*]Therefore resin anchors are reliable enough that even the unofficial ones are safe, due to the enormous safety margin
[/list]
This argument is not bulletproof. It's main flaw is that it compares the reliability of
properly placed spits and resins, and then draws a conclusion about
improperly placed resins.
The implicit assumption is that a resin anchor can be determined to be "safe enough" by user inspection (again, assuming multiple anchors are used appropriately). Guidance for user inspection is given in the CNCC rigging guide. Is this assumption false?
You can?t be serious. Have you ever removed one? I have pulled a few out using very little force and some ?unofficial? resin anchors have been pulled out by hand.
Sorry, "looks okay" was bad phrasing. I meant "passes a user inspection, as detailed in the CNCC guide".
Have you (or anyone else) pulled out resins that passed such an inspection? If so, how much force did it take?
Then there?s all the Petzl P38s and other assorted dubious ironmongery about the place; what about that?
Let's get rid of them.
Certainly I would have no idea how to inspect such anchors. I'm more confident in spits.
I wonder how you are going to decide which are the healthier Spits and which are too sickly to be included on your topo.
The same way I've decided whether to trust my life to them in every other cave:
- Is it flush with the rock (not sunken or protruding)?
- Is it perpendicular to the surface (not angled)?
- Do the threads appear in good condition?
- Does a bolt screw in all the way, without excessive force? Does it tighten firmly at the end?
- Is the rock solid (not fractured)?
- Is the spit far enough from other anchors in use, ensuring independence of failure?
- Does the rigging protect against a progressive rip-out, where one anchor failure applies huge force to the previous anchor?
To be clear, I wouldn't be surprised if I couldn't find
any good spits in the Dales. So far, I've only looked at a few spits for backing up insufficient resins, and all of those spits have been obviously crap. I even tried one just for fun, where the bolt could not be tightened -- as expected, it popped.
In the UK, I've used spits in Wales and Mendip, which were in much better condition. I assume that's mainly because they haven't seen the same level of traffic.
So I feel I can judge spits all right -- otherwise I wouldn't have used them! But what about resins? My belief has always been that they are fundamentally safer than spits. An essential part of that is the assumption that they can be inspected by the user.
If resins
cannot be safely inspected by the user, it would change my attitude towards them. Rather like how
your attitude to P38s changed, in fact.
Back in the day when we used Spits all the time cavers would often carry a motley collection of bolts which mirrored the state of the Spits. It was quite common to hear cavers describing how they tried a bolt in a Spit which jumped the thread when they tried to tighten it so they would then choose a less worn bolt, screw it in and use it. Maybe that?s a way that you could test for the healthier Spits. You could carry a worn bolt and try it in the Spits to see if it?s possible to tighten it.
That sounds like a dreadful state of affairs, and I would absolutely not want to use spits in that condition or with that cavalier attitude of "the thread's crap, so let's try a different crappy bolt and see if they match". No thanks, I'd rather forget the cave and go have a nice cup of tea.
Generally what you seem you seem to be advocating is a return to the state of anarchy that existed before the CNCC anchor scheme. It was a state of anarchy in which some people had little regard for safety and no regard whatsoever for cave conservation.
Whut? Huh? No, of course I'm advocating nothing of the sort. I'm Mr Safety, guvnor, truly I am. :ang:
Maybe I should just never use the word "spit" again, as it seems to bring people out in an oddly specific kind of rash.
What we do about them is an open question - any suggestions? Should they be on topos? Should they be ripped and and thrown away?
Perhaps I'm naive, but I really thought you were asking a question there. An "open" question, even -- the sort of question that might lead to an open discussion. Possibly even one where people can learn from each other without reaching for the pitchforks.
Okay, I admit it, I really am very naive.