Why do you guys use carabiners instead of quick links, which can be wrench tightened.

Jay

Quicklines are usually too narrow to allow clean loading of 1" webbing unless you get the very large ones. This especially becomes problematic if you are making a primitive tensioning system trying to use it as a makeshift pulley. In addition you still have the issue of having to manually thread everything instead of clipping or carrying a wrench every time you setup. If you were to make that trade off 50kn rap rings would be a better option.

That said, steel carabiners are an excellent compromise as they offer higher strength as well as the convenience of clipping and they are even lower friction than aluminum (according to the SAR reports I've read). Most people however aren't willing to dedicate such spendy equipment.

Tri-loading and not checking gates are the most common reason for slackline biner failure - and those are really caused by inattention or insufficent knowledge on the rigger's part making more of a human error issue.

I agree with Jim, this looks like an open gate failure. Most likely it was an old biner with a stickey gate, it wasn't fully closed when loaded and thus it failed, probably even at it's rated open strength.

my $20 says that even due biner failed due to an open gate, what really caused the gate to fail was side loading the biner which caused the elbow to open up allowing gate to miss the locking notch.

Why do you guys use carabiners instead of quick links, which can be wrench tightened.

Jay

The question I usually pose is "why do you guys slackline, because it's not climbing and therefore I couldn't give a crap about it?"

But then, I guess some people out there have fun slacklining. If they want, I guess.

I should have prefaced my question with, "The lameness of the activity notwithstanding...."

Jay

If it is so lame then why are you spending your time perusing the slackline forums? Do you two look for ways to put other people's interests down? To me that is worse than spending time on a "lame" activity.

At what point did we all decide not to play nice?

By just looking at the way you guys rig, there are so many problems with your systems and looks like most of you follow each other on wrong rigging tips.

Well going by their instructions I set it up and first walk the cam fails and i hit the ground.

The reason I feel that all these precautions are a bit over the top is the scenario here, a 250+ lbs person on a line tightened with a 5:1 pulley is just begging to fail. Majid as silly as he sometimes is is right about looking at the degree of the angle formed, but he's looking in the wrong spot, he ought to be looking at the angle in the center of the line, where with a big fella and a tight line the breaking strength of our gear can be exceeded pretty fast.

On a highline this would of course be a bit different, but for my everyday slackline I'm only worried about failure involving over-tensioning.

When some hypersensitive idiot couldn't recognize a joke.

Jay

I apologize for not recognizing some joke that my sense of humor/knowledge base didn't pick up on, but there was no need to call me a hypersensitive idiot. I have seen far too many posts by you and jt512, where you slam someone for not much reason at all or for something that you two could have very easily ignored.

Are you sure there's no reason to call you a hypersensitive idiot?

Jay

Steel biners: a few extra bucks
Hospital bills: thousands

Not a hard choice....

wrong steel can break as well my freind
more like
setting up a line with hevel mettle = death
setting up a line with soft points slack hitches and nothing that is not webbing = some one who know how to set up a slack line = do your homework

Back to OP:
I think Majid has a good point about wrapping towels or t-shirts around any hardware being used to help prevent projectiles.