Today on our Knot of the Week, we’re going to continue our Fast Rope construction with a demonstration of a 4-Strand Eye Splice.

On a previous KOTW we’ve shown how to create a 3-Strand Eye Splice, and while this may appear similar these are two very different techniques.

The Eye Splice is the strongest and safest method of terminating a Fast Rope (4-Strand Round Braid). It develops approximately 85% of the breaking strength of the line, which as we’ve mentioned is right around 28,000+ lbf (pound force) or 129 Kn (kilonewtons) with the 4 pairs of 7/16″ Blue Water Assaultline Static Rope used in construction.

An Eye Splice also enables the rope to be girth hitched onto a beam to climb. Traditionally in Military Fast Ropes, the eye splice is used to attach to the davits found on some helicopters.

Eye Splice Guidelines

According to MIL-F-44422, Mil-Spec construction for fast ropes, “The main rope shall have an eye splice on one end with a minimum of 4 inches and a maximum of 6 inches inside length. The eye splice shall be made using a minimum of three full tucks and two half tucks.”

Let’s break this down and tie it into our discussion on how to create the Eye Splice on a Fast Rope. First off, what they mean by inside length is the distance spanned across the inside of the eye. Ours actually sits right at 4″ relaxed and 6″ pulled open.

Tucks refer to the amount of times each strand pair tucks under the pair to its right or left. We state in the video below that the optimal amount of tucks is 4 full tucks and 2 half tucks, but we actually ran out of room on our Fast Rope and did the 3/2 minimum that the Mil-Spec construction requires.

Construction

The first thing you’ll need to understand when creating a 4-Strand Eye Splice, is the difference between right-laid strands and left-laid strands. While we go into this in the video, a quick glance at the image to the right should clear up the difference for you. The strands coming from the right down to the left are right-laid strands and the strands coming from the left down to the right are left-laid strands.

Understanding this difference is important when you bend the rope around to create the eye. Your working end should be to the right of your standing part and the same-laid strands should match up before securing your created eye with a string or whatever method you choose.

Again we’ll defer to the video, because it’s a lot easier to comprehend the instruction while watching than it is reading about it. The video is one of our ones, but an important one, especially considering you could potentially be trusting this Eye Splice to support your weight many feet up in the air.

One tip that we didn’t enforce enough in the video is to securely wrap your paired working ends, all four of them, tightly with tape. The tape should also come to a point as much as possible so it can be worked into the tucks better. This can be a somewhat frustrating experience, but stick with because the end result gives you a great feeling of accomplishment.

Next KOTW

In our next KOTW we’ll be showing you how to terminate the free end of the Fast Rope by searing and whipping to properly secure it, be sure to check back for the completion of how to make your own Fast Rope for Climbing!

Remember that when hanging your Fast Rope for climbing to ensure you have a proper girth hitch around a secure object like in the photo to the right.

Building a Fast Rope for Climbing: Part 1, 4-Strand Round Braid

Building a Fast Rope for Climbing: Part 3, Whipping and Fusing

We’re going to deviate from our Fishing Knots this week to bring you one of our favorite knots, the Eye Splice.

Splicing a rope is a tremendous skill to learn, and will benefit you time and time again.

This technique creates a permanant modification to a rope. The difference between a splice and a knot is that no matter how strong your knot is, it can still come untied.

There are many different kinds of splices, but the concept is the same in each. You’re simply separating the strands of the rope and weaving them back into the standing part of the rope.

With an Eye Splice, you’re creating a fixed loop that can be any size that you determine. It can be used for anything from mooring lines to climbing ropes.

Splicing is stronger in natural fiber ropes like the three-strand Manilla Rope we’ve used for our demonstration.

Synthetic ropes are good to use too, but just ensure that there’s no slipping of the individual strands.

Eye Splice » Splices

(Strength: 5/Secure: 5/Stability: 5/Difficulty: 4)

Please refer to our Knot of the Week introduction post for a description of what these ratings mean.

Uses:

• Creating a fixed loop (or eye) in a rope for use in mooring lines or climbing ropes
• The possibilities are endless!

Preparation

A few extra steps are necessary to properly prepare your three-strand rope for splicing.

For starters, and at the very least, you’ll need to tape off the point where you’ll stop unravelling the end of your rope to ensure it doesn’t unravel past your chosen point.

It’s also a good idea to tape the area right above where you’ll splice into for the same reasons above.

What we’ve done is to also take different colored electrical tape and not only wrap each individual strand, but tape them in a way that creates a tip that will make weaving easier.

The colors are a great way to learn how to splice because you can actually see exactly how the different strands weave into each other.

Our YouTube video below goes into this in a lot more detail, and we’d highly recommend watching it for this Knot of the Week.

We’re going to try something new this week, instead of writing out step by step instructions we’re going to ask that you refer to the video and photo gallery below.

No matter how in-depth we attempt to try and describe splicing it’s no match for watching it done. Let us know how it works out for you!