How to Tie the Short Splice
Usage
The Short Splice permanently joins two ropes into one continuous length that never has to pass through a block, pulley, or sheave — the standard way to lengthen or repair rope without the strength loss a knot would cost. It's tied by unlaying the ends of both ropes and weaving the strands of one into the other.
Because the strands interlock rather than relying on a single nip point, the join carries load through friction and mechanical interlocking instead of a bend radius — Ashley (ABOK) and Mazzella both report it retains more of the rope's strength than a knot or bend, per Wikipedia's summary.
Why Learn the Short Splice?
Once it's made, there's no working knot to loosen or capsize — the join is set for good, the standard answer any time rope needs to be permanently lengthened or repaired rather than temporarily joined.
It also teaches the core over-and-under tuck the Eye Splice and other splicing work builds on.
Common Uses
Marine and Mooring
- Joining dock or mooring rope, provided it's tapered and fully tucked.
- Extending a tow rope or dinghy painter: a genuinely serviceable fix when tucked and set correctly.
- Anchor-rode chafe repair: cutting out a damaged section and splicing the rode back together — but only where no windlass must pass the rode.
Hoisting and Farm Use
- Wire-rope block straps and slings: static service, documented in Hasluck's 1907 period rigging manual.
- Farm rope repair: covered in Overholt's 1922 extension circular The Use of Rope on the Farm, workable once the splicer accepts the added bulk at the join.
The same base tuck also underlies the Back Splice, which finishes a single rope end rather than joining two.
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Other Names
Over and Under Splice · Sailor's Short Splice · Regular Short Splice · Round Splice
Category
Boating / Marine · Utility (Everyday Life) · Hoisting · Decorative and Crafting
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Notable Features
- No working knot: a woven mechanical structure with nothing to capsize or slip once it's made.
- High strength retention: Ashley and Mazzella report (per Wikipedia) it keeps more of the rope's rated strength than a knot or bend joining two ends, though no lab test specific to this splice was located.
- Doubled diameter at the join: thickens the rope to roughly twice normal diameter — the trade-off for that strength.
- Permanent by design: can't be undone without unpicking or cutting it.
Similar Knots
Long Splice vs. Short Splice
The Long Splice (Verrill's Knots, Splices and Rope Work, 1917) replaces two of each rope's strands with the other rope's, keeping the join near the rope's own diameter at the cost of some strength. It doesn't have its own page on this site yet.
- Advantage (Short Splice): stronger and faster to tie.
- Disadvantage (Short Splice): too bulky for a block, sheave, or windlass — where hardware passage matters, the Long Splice is the better choice.
Eye Splice vs. Short Splice
The Eye Splice uses the identical over-and-under tuck, but returns one rope's own end into its own body to form a loop instead of joining two ropes.
- Advantage (Short Splice): the right choice for joining two separate rope ends into one line.
- Disadvantage (Short Splice): no use for it if what you need is a fixed loop — that's the Eye Splice's job.
Security Level
A correctly tucked Short Splice is about as secure as a permanent join gets — no working knot to work loose, wet or dry, slack or loaded. The real caution is durability, not slippage; the FAQ below has tuck-count guidance by material.
Downsides
- Won't pass hardware: too bulky for blocks, sheaves, or pulleys.
- Requires matched rope: both ends need the same diameter and construction.
- Permanent once made: can't be adjusted or undone without unpicking or cutting it.
History
Sailors once called this join the Round Splice, before the name changed to Short Splice in the eighteenth century, distinguishing it from the thinner Long Splice it's most often compared against. The tuck technique itself predates the name.
How to Tie the Short Splice
Step 1
Unlay roughly 4-8 in (10-20 cm) of each rope end, then crotch (marry) the ends together so the three strands of one rope alternate with the three strands of the other, and stop them temporarily.
Step 2
Hold the splice across your lap while seated — it makes even tensioning across six strands much easier to manage.
Step 3
Take the first strand-end, turn it back counter-clockwise, and tuck it through the opposing strand it opens against, using your thumb to work it through.
Step 4
Turn the rope about a third of a turn toward yourself and tuck the next strand the same way, then repeat for the third strand on that side.
Step 5
Turn the splice end-for-end and tuck the other rope's three strands identically.
Step 6
Remove the temporary stop and draw all six strands snug and even.
Step 7
Tuck all six ends a second time, this time working them in the opposite twist direction so each strand lies fair against the next.
Step 8
Trim the ends to about the rope's own diameter, or keep tucking (see the FAQ below for tuck-count guidance by material).
Two named variants build on this same base tuck without replacing it: a tapered version for better wear resistance, and a modern synthetic-rope method with extra tucks for slippery fiber.
Practicing on a scrap length of three-strand rope beats reading steps alone. The Knot Tying Kit is a good companion for the rest of your rope skills, though this splice isn't one of its printed cards; the Knot IQ app is a good place to look up the next knot in the family.
FAQ
Is a Short Splice stronger than a Long Splice?
On a testing machine, yes. But real-world chafe on an untapered splice erodes that advantage, so taper it; Overholt's 1922 farm manual simply asserts the two are equal in strength, without describing any test.
Can a Short Splice go through a block or pulley?
No — it's too bulky for running rigging, blocks, sheaves, or pulleys.
How many tucks does a Short Splice need?
Three tucks per side is the historical natural-fiber convention. Modern synthetic rope needs a minimum of five, because synthetic fiber is slipperier and needs more wraps to grip.
Important Notes on Safety
- Never use a Short Splice in a crane or hoist's running or driving rope. The bulk makes it unsuitable for that service — it belongs in static slings and straps, not moving rope.
- Taper any splice that will see repeated dragging or rubbing. An untapered splice's abrupt shoulders can chafe against obstructions and weaken the rope at the entrance to the splice over time.
