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For the backup knot, Weidner ties the end in a simple overhand knot below the double bowline.
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I happened to look down at my double bowline, and … tap-dancing Jesus, it was half untied!
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The double bowline knot with a backup.
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He tied one end of the rope to a standpipe near the southeast side of the roof, a double bowline.
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Tied correctly, the double bowline is a safe, versatile climbing knot and will hold the weight of a fall without fusing.
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There are two basic tie-in knots climbers should be familiar with: The figure-8 follow-through and the double bowline with a back-up.
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Double bowlines have been known to unravel with stiff, skinny cords.
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Visit Website Double Bowline With Backup Pros For big falls, this knot, which is easier to undo, solves the fused-figure-8 problem.