Which knot forms a fixed loop that does not slip under load and is commonly used for anchor attachments?

Which knot forms a fixed loop that does not slip under load and is commonly used for anchor attachments?

• A. Figure Eight on a Bight
• B. Figure Eight Follow Through
• C. Prusik Loop
• D. Water Knot

Answer: (A)

A fixed loop that won’t slip under load is created by tying a figure-eight on a bight. Folding the rope to form a bight and then tying the figure-eight around that bight locks the loop in place, so the loop size stays constant even when tension is applied. This reliable, non-slipping loop is exactly what you want for anchor attachments, because you can clip into the loop or secure the anchor with it without the loop deforming or sliding along the rope. Other knots serve different purposes: a friction loop like a Prusik grips when loaded but isn’t a true fixed loop for anchors, the water knot is used to join webbing ends rather than form a rope loop, and a figure-eight follow-through creates a loop suited to tying into a rope end for climber attachment rather than an anchor point.

A fixed loop that won’t slip under load is created by tying a figure-eight on a bight. Folding the rope to form a bight and then tying the figure-eight around that bight locks the loop in place, so the loop size stays constant even when tension is applied. This reliable, non-slipping loop is exactly what you want for anchor attachments, because you can clip into the loop or secure the anchor with it without the loop deforming or sliding along the rope.

Other knots serve different purposes: a friction loop like a Prusik grips when loaded but isn’t a true fixed loop for anchors, the water knot is used to join webbing ends rather than form a rope loop, and a figure-eight follow-through creates a loop suited to tying into a rope end for climber attachment rather than an anchor point.