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Double-line

Australian Plait

Doubled line · Jam

DiagramsHow to tie it

Does not pick a knot

This page does not pick a knot for you. DNA, molecules, quantum braids and vortices stay off Decide.

Finished structure

No drawing of this exact knot yet. The written steps are the reference.

HTH · Reference layout

Australian Plait — finished-state checks, on the shared reference layout

Australian Plait — finished-state checks, on the shared reference layout
Hook the Horizon reference plate
Failure modes

When this family fails, it fails as these. The recovered end still outranks the name.

Double-line family

A load-bearing loop of doubled line, locked so it cannot crawl back.

  • !Twists or wraps not packed before the lock
  • !Lock that crawls back into the double
  • !Uneven legs — one side takes the shock
Fails when
  • !Plait left loose, so the loop strands slide and the double pulls out under load
  • !Tag loop closed on nothing, so the plait unravels from its end
  • !Finish tightened fast and dry, so it sits loose and the end of the plait opens
Geometry

  • Loose plait that is not a double

    Unravels in the guides

    A plaited double is density plus a lock, not three loose strands · step 02

  • Too short a double to plait tightly

    Cannot be locked; walks on the first load

    The double has to be long enough to plait and lock · step 01

  • Incomplete lock at the plait end

    Unlocks on the first load

    An unlocked plait end is unfinished · step 03

If you saw this

  • Plait loosens under load

    Check

    • ?Plait density
    • ?End lock

    Then

    • →Rebuild tighter
    • →Use Bimini when conditions allow

  • Finished check failed — Loose plait with gaps

    Check

    • ?Plaited double-line section uniform
    • ?Locking finish secure
    • ?Legs share load

    Then

    • →Retie. A gappy plait concentrates load on one leg and fails early.

  • Loose plait that is not a double

    Check

    • ?Unravels in the guides
    • ?Inspect step 02

    Then

    • →Retie. Do not dress a defective structure and call it seated.

  • Too short a double to plait tightly

    Check

    • ?Cannot be locked; walks on the first load
    • ?Inspect step 01

    Then

    • →Retie. Do not dress a defective structure and call it seated.

  • Incomplete lock at the plait end

    Check

    • ?Unlocks on the first load
    • ?Inspect step 03

    Then

    • →Retie. Do not dress a defective structure and call it seated.
Same family

Same failure class, different geometry. Open the plates — Diagnose still starts from the symptom.

This failed — start Diagnose

What holds it

  • ·A double-line is a made pair: twist, hitch or plait, then an end lock. The lock is the knot; the pair is the product.
  • ·If the lock opens, you no longer have a double. That is a Diagnose story (double-line unravelled), not a change of mathematical type.

What topology does not predict

  • ·Bimini wrap count is a cited procedure, not a Jones degree.
  • ·Shock-load behaviour of the pair is material and construction. Unknown stays unknown here.
  • ·No IGFA or tournament rule is inferred.

Not for

  • ·A single-line terminal to a hook eye
  • ·Calling an unlocked plait a finished double
  • ·Quick bankside reties
  • ·Beginners without practice

Same pattern, different job

No sourced twin among these knots. Related knots stay on the Library card.

Sources