Bolting may be an option, however I have never done it myself. Would the hexes and cams be unsafe for climbing after that kind of stress?

There's no data either way. However, a constant load of a couple hundred pounds, with peak load being great enough to occasionally break webbing and carabiners? Yeah, probably not good for your cams and hexes.

Someone actually made force messurements with slacklines:

http://www.lorenz-messtechnik.de/...surements/170243.pdf

In every article I have read about highlineing, its highly advised you don’t use cams due to their limited strength. A fall on a highline could easily generate over 12 kN on the anchors. From what I see its generally recommended to use 1/2" bolts. I plan on building a highline myself eventually and when I do I am going to use three or four glue in titanium staple bolts on each side and equalize them.

you are gov approved n00b

That means a lot coming from you, the most decorated idiot on the entire website... Yes I was wrong, highline falls don’t generate 12 kN. They generally generate more than that now that I am looking around... Just a jump on a slackline can easily generate 8 kN.

So tell me master Majid, do you believe it’s a good idea to use cams that are rated for 12 - 16 kN in a application where they can easily see more then 12 kN? Please provide me with multiple MS Paint diagrams on how it’s both safe and cost effective to use cams over bolts and be sure to include color coded pointers expressing small but important details in the diagram.

I'm aware of the force measurements. I mean UIAA style tests of carabiners after being used in a slackline for an extended period of time. Tests that measure the impact on a carabiner (let alone cams, hexes and nuts) from high loads for long periods of time has not yet been done.

yes you can use any active or passive protection to build a highline anchor but you need to remember that in real world situations, all non-fixed protections should be rated to no more than 5 kn therefore, you need to use several of them to construct your anchor. Highline itself and highline anchors are among the most dangerous of all in rope rigging and this is where the art of building simple and complex anchor build comes handy. Generally you want a good static line to construct your anchor with good master point to exceed 30kn .Other factors such as sag, distance between the anchors, load, number of highline etc plays big rule in building safe highline.

Next year I am headed to the middle east to do a highline over a dead volcano hole which is 400 feet across. we are going to use anchors made of steel rods on both side of the hole then build four separate anchors for two highline. once we get to the middle of the highline, we will rap another 300-600 feet in to the hole to see what is out there and then jug back up.

No one is ever done this over there so we look forward to be the first .

Thank you for making my point for me. Yes you can use trad gear but you can also use bolts and bolts are much safer and they cost less money then trad gear thus its a much more intelligent choice to use bolts over gear.

In every article I have read about highlineing, its highly advised you don’t use cams due to their limited strength.

Problem with the breaking biners is cyclic loading.
The given strength is breaking strength.
For cyclic loading aluminum alloys only have half the rated strength (in general)
So if you create a force of 10kN on a slackline that means that your biner rated to 24kN has next to no safety margin for cyclic loading.

That, and the fact that when they pull, they become high-speed projectiles.

Ummm....you realize you just resuscitated this thread that was over a year old to add good, but not terribly important information, right?