can u spot the safety issue ...

Mark Pilate wrote:Alex - that may be an over generalization. While I agree with you mostly, there is a large distribution in bolt strength in perpendicular tension (due to bolt type, installation expertise, age, etc etc) definitely much weaker in that direction. That said, Page failed to notice that only one of the upper bolts is in tension (the other appears to be in pure shear)....still not enough to worry about. And Bearbreeder's fear of a shock load on a biner due to the sling is unfounded because the entire chair is a spring steel shock absorber - the leg on the fall side will deform and absorb the energy, as will deformation of the chair frame.

So ur saying that its totally fine to jump off the chair as is?

I suspect that the body would see quite a bif of force on that sling regardless

These arent dynamic ropes were talking about, but metal frames and static nylon

If its really no worry then i invite people who think its safe to jump off on video ... Imagine the number of youtube hits youd get

Of course if it goes kaput, i take no responsiblity

;)

johnnyrig wrote:Did you people not see the curved legs?

Hell, yes! ummm, oh wait, you're talking about the chair . . .

20Kn - You sure those specs are for the installed bolt? Seem awfully high even for high psi concrete. You sure those are not the figures for the bolt itself?

She's carrying a Gri-Gri. She's gonna die.

I'm not sure why you photo-shopped me into a chair in that pic, but...

I for one, would NEVER think about pull-out strength. It's OBVIOUS that I would NEVER pull-out...in THAT situation. The safety issue is if my wife ever found out!!!

24kn carabiner connected to a 0kn lawn chair frame. You gotta learn how to equalize. In this case you should hacksaw 2/3 the way through the carabiner.

judging by the Beanie I am assuming she is a real good climber. The biggest problem I see is the bolts a tad more then a foot away from that nice horizontal crack.

Mark Pilate wrote:20Kn - You sure those specs are for the installed bolt? Seem awfully high even for high psi concrete. You sure those are not the figures for the bolt itself?

I pulled it straight from the data tables for 6,000 PSI concrete. You can view the specs on the respective companies' websites. Also, those are for 4.5" long bolts which is why the value is so high. I used that value because the rock we install these bolts in is normally stronger than 6,000 PSI and therefore will simulate a bolt of a greater depth (i.e. the bolt will fail before the rock).

I trust you. I guess I learned something new.

Angle between anchor components attached to bolts is not less than 90 and certainly not in the ideal range of 15-20 degrees. She's gonna' die.

Jonny d wrote:Angle between anchor components attached to bolts is not less than 90 and certainly not in the ideal range of 15-20 degrees. She's gonna' die.

Au contraire! Those side rails are parallel i.e. 0 degree included angle.

Are those curved side rails made of spring steel? I can see a bouncy dynamic response to any pull or fall. Very clever design, improves safety I'd say!

some additional observations and insight:

1. Not wearing climbing shoes
2. Where is the climbing rope?
3. the hangers on the chair are just plain stupid and a waste of money(for this setup)...just clip into the rock anchors and be done with it.
4. there's probably a gigantic grassy slope 4 feet below her(trick photography)
5. she's probably Mormon
6. If this is a permanent fixed chair why would you use locking pear beaners to attach it to the wall? why not chains? Oooor they hiked the stupid chair all the way up the hill to get this stupid contrived photo...it would be much cooler if she was belaying someone on lead. Alright it's kinda cool and the chair is kinda nifty....but

about the safety concern (in the event of a fall out of the chair)
As it applies to this photo: Bolting a hanger to a ROUND tubing surface as an anchor is not a good idea. In a fall it would only take a small amount of force to spin and roll the hanger over the tubing bending and potentially snapping the bolt, this would definitely be the case due to the way the chair is anchored to the wall as it would bind ...again if she were clipped into the rock no issues

And it looks like she forgot to lock her beaner

I would imagine the hangers on the chair being perfectly fine if you clipped them vertical for say belaying a multi-pitch in a cave and you were anchored into the rock not the chair

example:

bolt snap
^^I'm assuming the person engineered the chair so this wouldn't happen but ya never know.

Anywho, pretty girl and it looks like a nice spot to read a book.

She is gona die!! that chair is not UIAA and CE certified for climbing applications.

Holden Caulfield wrote: Bigot much?

I respect your right to believe in fairy tales.

People are so easily offended on here.
Between the people calling others chauvinistic/lewd for calling her "a cute girl" and calling people bigots because they made an observation that she might be Mormon (with no negative connotation other then just stating the assumption)

Everyone needs a hobby I guess, gotta complain about sumtin'

I am offended by Split161's bolt analysis.

Well, not really. It was a good idea in theory, but take a closer look at the actual hangers on the chair. The rotation and leverage you describe in your pic is not a likely factor. There will be little further rotation, and deformation of the hanger will actually absorb some of the energy. When added to the deformation of the chair, legs, and the girl's pelvis, its not likley to generate enough force to snap off the bolt heads.

I think someone should put their money where my mouth is and take a swan dive off the thing to put all this idle speculation to rest.....

Mark Pilate wrote: I think someone should put their money where my mouth is and take a swan dive off the thing to put all this idle speculation to rest.....

I'll do it. Done it before.
Grill

Woodchuck ATC wrote:Are those curved side rails made of spring steel? I can see a bouncy dynamic response to any pull or fall. Very clever design, improves safety I'd say!

assuming the first or third harmonic of the resonant frequency of the chair aren't an ignition point for nicelegs theory of vibration, i think we are ok. if the second harmonic is an issue, we need to investigate any sources of non-symmetric non-linear inputs.

"Bigot much?"

how was my 5th obs in any way bigotry?

^^Tim C is absolutely correct.