Splicing and Finishing

Part of Rope Making

Joining ropes and finishing ends professionally for maximum strength and durability.

Why This Matters

A knot in a rope reduces its strength by 40-60%. Every knot creates a point where fibers are crushed, bent at sharp angles, and subjected to uneven loading. In critical applications — lifting, climbing, rigging, bridge building — these weak points can mean the difference between a structure that holds and one that fails catastrophically. Splicing eliminates this problem by weaving rope strands back into the body of the rope, creating a joint that retains 85-95% of the rope’s original strength.

Finishing rope ends is equally important. An unfinished end unravels within hours of use, progressively shortening the rope and weakening the final strands. In a rebuilding scenario where every meter of rope represents significant labor, losing length to unraveling is an unacceptable waste. Proper end finishing — whipping, seizing, or back-splicing — locks the end permanently.

These are not decorative skills. They are structural techniques that determine whether your rope functions as engineered or fails unpredictably. A settlement that knows how to splice and finish rope effectively doubles the useful life of its cordage supply and dramatically improves the safety of every rope-dependent structure.

Tools for Splicing

Splicing requires minimal tools, all of which can be improvised:

Tool	Purpose	Improvised From
Fid (marlinspike)	Opens the lay of the rope to insert strands	Smooth hardwood spike, antler point, sharpened bone, large nail
Knife	Cuts rope cleanly and trims ends	Any sharp blade
Whipping twine	Thin cord for binding ends	Finest available fiber, tightly twisted
Tape or binding	Temporarily secures strand ends during splicing	Thin strip of bark, dampened rawhide, or just tight twist

Making a Fid

Carve a smooth, tapered spike from hardwood (oak, ash, maple). It should be 15-25 cm long, tapering from about 2 cm diameter to a blunt point. Sand or scrape it completely smooth — any roughness will catch and damage fibers during splicing. A well-made fid lasts for years.

The Eye Splice

The eye splice creates a permanent loop at the end of a rope. This is the most commonly needed splice — used for attaching rope to posts, rings, hooks, and other ropes.

Step-by-Step Eye Splice (Three-Strand Rope)

1. Unlay the end: Untwist the last 15-20 cm of rope into its three individual strands. Temporarily bind or twist each strand end tightly so it doesn’t fray during work.

2. Form the eye: Bend the rope back on itself to create the desired loop size. The point where the unlaid strands meet the standing part of the rope is where the splice begins.

3. Tuck strand 1 (center strand): Select the middle unlaid strand. At the point where it meets the standing rope, use your fid to open the lay (separate two adjacent strands) and pass the middle unlaid strand through, going under one strand of the standing rope and over the next. Pull it through snugly.

4. Tuck strand 2: Take the strand to the left of the one you just tucked. Go over the strand of the standing rope that strand 1 went under, and tuck it under the next strand to the left. Pull through.

5. Turn the work over: Flip the splice. The remaining strand 3 should be on your working side now.

6. Tuck strand 3: Tuck it under the only remaining un-used strand of the standing rope. Pull through.

7. Complete the round: You’ve now done one full round of tucks. Each unlaid strand has gone under one strand and over one strand of the standing rope, spiraling around it.

8. Repeat: Do at least three full rounds of tucks (more for heavy-duty applications). Each subsequent round follows the same pattern — each working strand goes over one standing strand and under the next.

9. Taper (optional): For a neat finish, cut half the fibers from each working strand before the final tuck. This creates a gradual taper rather than an abrupt end.

10. Trim and finish: Cut the remaining strand ends close to the splice. Roll the splice firmly between your hands or under your foot to settle the strands into place.

Tuck Count and Strength

Three full tucks gives approximately 90% of full rope strength. Five tucks gives 95%. More than five provides negligible additional strength but makes the splice neater. For critical applications, always do five tucks.

The Short Splice

The short splice joins two rope ends together. It is the strongest splice (retaining 90-95% of rope strength) but increases the rope diameter at the joint, which means it won’t pass through pulleys or tight openings.

Step-by-Step Short Splice

1. Unlay both ends: Untwist 15-20 cm of each rope end into individual strands. Bind strand tips.

2. Marry the ropes: Bring the two ends together so the strands of one rope interleave with the strands of the other, like interlocking fingers. Push them together until the unlaid sections meet the laid sections of the opposite rope.

3. Temporarily seize: Tie a temporary binding around the marriage point to hold everything in place.

4. Tuck one side: Working with the three strands from rope A, tuck them into rope B exactly as you would for an eye splice — over one strand, under the next, working around the rope. Do three to five rounds of tucks.

5. Flip and tuck the other side: Turn the work around and tuck the three strands from rope B into rope A in the same manner.

6. Remove temporary seizing: Cut the binding at the marriage point.

7. Fair and trim: Roll the splice under your foot, trim strand ends, and work the splice to settle all strands evenly.

When to Use a Short Splice

• Joining two ropes that will be used for straight pulling (hauling, tying down)
• Repairing a rope that has been cut or damaged in the middle
• Joining ropes of the same diameter and construction
• Any application where the rope doesn’t need to pass through blocks or rings

The Long Splice

The long splice joins two ropes without increasing the diameter. The joint is nearly invisible and passes freely through pulleys and guides. It is weaker than the short splice (80-85% of rope strength) but essential for running rigging.

Step-by-Step Long Splice

1. Unlay both ends: Untwist a much longer section — at least 60 cm per rope (longer for thick rope; a general rule is 15 times the rope diameter per side).

2. Marry the ropes: Interleave the strands as for a short splice.

3. Replace strands: This is the key difference. Take one strand from rope A and one adjacent strand from rope B. Unlay strand B further while simultaneously laying strand A into the groove left by strand B. Continue for at least 30 cm. This effectively replaces one strand of rope B with a strand from rope A.

4. Repeat in the opposite direction: Go back to the marriage point. Take another strand pair. Unlay the rope B strand the other direction, replacing it with the rope A strand. Continue for 30 cm.

5. The remaining pair: The third pair of strands stays at the original marriage point.

6. Join strand pairs: At each of the three points where strand pairs meet (one at the center, one 30 cm to the left, one 30 cm to the right), join the two strands by:

   • Halving each strand (splitting it into two roughly equal bundles of fiber)
   • Tucking each half-strand over and under as in a standard splice (2-3 tucks)
   • Trimming the ends close

7. Roll and settle: Work the entire spliced section firmly between your hands to embed the tucks into the rope body.

Skill Required

The long splice is the most difficult splice to execute well. Practice on scrap rope before attempting it on critical cordage. A poorly made long splice can slip under load.

Finishing Rope Ends

An unfinished rope end unravels. Period. Here are the methods to prevent it, from simplest to most durable.

Common Whipping

The most widely used end finish. Durable, neat, and quick once practiced.

1. Prepare whipping twine: Use thin, strong cord — about 1 mm diameter for average rope. The twine should be about 20 times the rope circumference in length.

2. Form a loop: Lay the twine along the rope near the end, with a loop pointing toward the rope end. Hold the loop in place.

3. Wind tightly: Starting from the standing part of the rope toward the end, wind the twine tightly around the rope, trapping the loop underneath. Each turn should sit snugly against the previous one. Make at least 8-10 turns (the whipping should be as long as the rope is wide).

4. Pass through the loop: Thread the working end of the twine through the small remaining loop.

5. Pull the buried end: Pull the buried end of the twine (the one you started with) to draw the loop and the working end under the wrapping, toward the middle of the whipping.

6. Trim both ends: Cut both twine ends flush with the whipping surface.

The result is a tight band of twine with no exposed ends — nothing to catch or pull loose.

Back Splice

A back splice uses the rope’s own strands to lock the end. It’s bulkier than whipping but requires no additional materials.

1. Unlay 8-10 cm: Untwist the end into three strands.
2. Form a crown knot: Take each strand over its neighbor and tuck it under the next, forming a flat cap on the rope end. Pull tight.
3. Tuck strands down: Now tuck each strand down into the body of the rope, exactly as in an eye splice — over one, under one, for three full rounds.
4. Trim: Cut the strand ends close.

The back splice makes the rope end slightly larger in diameter but is extremely durable and cannot come undone.

Simple Binding Methods

When you need a quick end treatment and don’t have time for proper whipping:

Method	How	Durability
Overhand knot	Tie a simple overhand knot at the rope end	Temporary — will loosen with use
Heat sealing	For bark or leaf fiber rope, briefly expose the end to flame	Moderate — chars and fuses outer fibers
Glue/pitch	Coat the last 2-3 cm in pine pitch or hide glue	Good — waterproof and durable
Rawhide wrap	Wrap wet rawhide strip tightly around the end; it shrinks as it dries	Excellent — extremely tight and long-lasting
Constrictor knot	Tie a constrictor knot with thin cord at the end	Good — very tight, nearly permanent

Seizing: Binding Ropes Together

Seizing binds two ropes (or two parts of the same rope) together without splicing. It’s used where ropes cross, where a rope wraps around a post, or where a temporary but strong connection is needed.

Flat Seizing

1. Pass the seizing twine around both ropes (or both parts of the rope)
2. Wind tightly for 8-12 turns
3. Pass the twine between the two ropes, make two cross-turns over the top of the seizing (perpendicular to the original turns)
4. Tie off with a square knot between the ropes
5. Trim ends

Racking Seizing

For connections under heavy load, racking seizing weaves the twine in a figure-eight pattern between the two ropes, preventing them from sliding. This is significantly stronger than flat seizing and is used for structural applications like bridge construction.

1. Start as with flat seizing
2. Instead of simple wraps, make figure-eight turns — the twine goes over one rope, between them, under the other rope, between them, and back over the first
3. Continue for 10-15 turns
4. Finish with 3-4 regular turns on top and tie off

Practice Progression

Master these skills in order:

1. Common whipping — practice on any scrap rope until you can do it in under 2 minutes
2. Back splice — learn to form the crown knot reliably
3. Eye splice — the most useful splice; practice until you can do it without thinking
4. Short splice — straightforward once you understand eye splice tucks
5. Long splice — the most advanced; requires patience and practice

Practice Material

Make practice rope from grass or rough fiber that’s quick to produce. Don’t waste good rope learning to splice. Once your technique is reliable, apply it to quality cordage.