Figure Eight on a Bight
Also known as:Double Figure Eight
Description
The figure eight on a bight creates a secure, fixed loop in the middle of a rope by folding a bight and tying a figure eight knot with it. The result is a loop that is stronger and more reliable than a simple overhand loop. It is a fundamental knot in climbing.
Common Uses
Used by climbers to create a secure loop for attaching a carabiner to an anchor or for creating a central attachment point on a rope.
When to Choose This Knot
Choose this knot when you need a loop that can connect to a post, ring, hook, carabiner, handle, or another rope part. Loop knots differ in whether they stay fixed, cinch down, or remain easy to untie after loading.
Safety Notes
- Confirm whether the loop is intended to be fixed or sliding before applying load.
- For climbing or rescue, use only knots and rope systems approved by your training program or local standard.
- Check that the standing part, tail, and loop are oriented correctly before loading.
How to Tie
- 1Fold a bight of rope at the desired location for the loop.
- 2Treat the bight as a single strand and tie a figure eight knot.
- 3Pass the bight through the first loop as you would for a standard figure eight.
- 4Pull the bight and the standing ends to tighten.
- 5Dress the knot so the strands lie parallel and the loop is clean.
Common Mistakes
- Confusing a fixed loop with a noose or running loop.
- Loading the loop from an unintended angle.
- Skipping a backup knot where the application requires one.