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KNOTS & SPLICES

Short Splice

The permanent way to join two lines of the same size — nearly as strong as the rope itself.

INSPECT BEFORE LOAD · NEVER EXCEED WLL

Rope, splices and hardware are only as good as their condition. Inspect before every use and retire on evidence.

Short Splice — nautical chart line drawing

Specification

TypeSplice — joins two lines
Strength retention85–90%
Easily untiedNot reversible
Suitable diameter6–36 mm
Jam riskNot applicable
Common errorStrands not married in the correct order

Technical parameters

Retention85–90%
Tucks per strand3 minimum, 5 preferred
Time (3-strand)30–45 min
BulkNoticeably thicker
Runs through blocksNo
AlternativeLong splice
TieLoad

Overview

A short splice joins two ropes by interleaving their strands: each line is unlaid, the two ends are married together, and then each strand is tucked over one and under one into the opposite line. The result is a joint that is thicker than the rope but retains around eighty-five to ninety per cent of its strength.

It is the repair of choice for a three-strand line that has chafed through or been cut, and it is the standard way to join two lengths of the same rope permanently. Unlike a knot, it does not reduce strength by concentrating the load at a sharp turn; the load is distributed across the tucks.

The bulge is the limitation. A short splice is noticeably fatter than the rope and will not run through a block, a clutch or a fairlead. Where the line must run freely, a long splice — which is spliced over a much greater length and barely thickens the rope — is the alternative.

Safety notes

  • A short splice will not pass through a block or sheave. Never fit one where it must run.
  • Five tucks per strand for load-bearing work, and taper the final tucks.
  • Check that the strands are married correctly before tucking — a mis-married splice looks plausible and is weak.

Using it well

  • Marry the strands so that each one lies between two of the opposite line, alternating.
  • Tighten each tuck as you go rather than waiting until the end.
  • Whip or heat-seal the tapered tails to stop them fraying out of the splice.

Suited to

Three-strandRepair workPermanent joinsMooring

Typical applications

RepairRiggingJoining lines
Figures are typical catalogue values for new equipment, quoted for comparison and planning. They are not a guarantee for any specific product or any specific load. Always work to the manufacturer’s stated working load limit and to the regulations that apply where you sail.

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