There IS a reduction in strength, at the point where the cordage bends around itself.
Therefore, whenever possible use a tensionless hitch around a cylindrical object with at least a 4” diameter. All knots reduce the breaking strength of rope. 26 comments. Was wondering if using the girth hitch is fine or if looping the sling around the anchor and tieing each loop end together with a figure 8 is materially stronger? Abstract .
Be sure to also check the value in actual kN.
First, the girth hitch can reduce sling strength up to 50%. Therefore any reduction in strength caused by a knot puts the strength below the 22kN standard. All girth hitch configurations failed at the point where the sling passed through itself. Slings have the largest Work Load Limit when used in a basket hitch. But that's why our gear is rated to lift a small truck. I usually clove hitch my rope in that situation. The strongest tie-in knot you can use is the figure-eight follow-through, which, when pull-tested, breaks at 75 to 80 percent of the rope’s full strength.
When making anchors my go to when possible is to girth hitch my anchor points and then build with a quad or equalette depending on how much extension I need. The vertical hitch Work Load Limit is 50% of the basket hitch.
706 Lakeview Dr., Sugar Land, Texas 77478 . Strength: The Girth Hitch weakens a sling, particularly if two straps are directly knotted to each other. Stated strength for a girth hitch varies from one report to another and with the specific connection (around a large object, sling on sling, on a carabiner), knot orientation (bend angle), and sling material. Girth hitch. Girth hitches showed a minimal strength reduction, with mean failure at 22kN, though the two-wrap girth gave more consistent failure results and a slightly higher breaking strength that approximately equaled the MBS. You can dress the knot appropriately to make it resemble a square knot. Be carful to never use a girth hitch to connect to slings together as it can cause a significant reduction in strength.
A simple hitch used in various situations, one being to attach a sling to a harness. Stronger anchor: Girth Hitch or Loop with a figure 8. Any bend tighter than 4” reduces the strength of rope because they stress the rope in flexure, the fibers’ weaker direction. Since most slings have strength ratings of 22kN, this isn’t a terribly big deal during normal use, but if you were to shock load the sling, this strength reduction could have disastrous consequences.
Or would the girth hitch/lark's foot result in an even greater strength reduction? Girth hitches showed a minimal strength reduction, with mean failure at 22kN, though the two- wrap girth gave more consistent failure results and a slightly higher breaking strength that approximately equaled the MBS. It is not recommended to girth hitch your slings to bolts, or your personal anchor systems (P.A.S) to the belay loop on your harness due to a significant reduction in strength and wear and tear to your equipment.
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