Strength test of nylon sling girth hitched to cable

Strength test of 22 kN nylon climbing sling girth hitched to 1/8" steel cable on BD #5 stopper. Sling breaks at about 1200 lbs force (5.33 kN)

Category:

Science & Technology

Tags:

• girth
• hitch
• sling
• nut
• stopper

[BreakOTron]

RobNoone87, thanks for watching! The point of this test was to determine how climbing gear performs under unusual circumstances. Plenty of tests have shown how slings, chocks, and stoppers perform in "real situations;" it alomst invariably performs to its rated specification. The point of my tests were (and still are) to explore the sort of situations, no less real, that climbers occasionally must resort to under desperate circumstances. Thanks, Bob "BoKu" K.

[dove868]

@ dogdogee - it's not about whether or not you use a cable or a carabiner - it's the type of knot used - a girth hitch is very weak because of the extreme angles upon which the tape or rope is placed under - effectively you create a situation whereby only half of the surface area of the material is working effectively and so fails at much lower values than in so-called "normal" situations. :)

[BatmanProject777]

Kind of funny to see these tests performed with high tech machinery, gear made by extremely thorough and professional companies, etc...then the read out is placed on a humble cardboard box. I'm not saying i trust these results any less, just a little odd ;)

[dogdogee]

so it is just round 5,5 kN that is really low :(

nice to see one should use carabiners :)

[RobNoone87]

you should test them on a crab or around a rock, better to know how they act in real situations instead of direct to a wire??

[ja1484]

Boku, cool stuff. Nice to know how the gear reacts in non-ideal "emergency" type situations.