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Mooring Strops

Mooring Strops are ideal for permanent mooring configurations

The Jimmy Green Rigging Team are very experienced in splicing up Strops and Bridles for permanent mooring applications.

Anchorplait® is the optimum rope solution for a swinging mooring:

  • The rope construction precludes the possibility of cockling (unravelling)
  • The splice design is very secure and will not unravel

LIROS Anchorplait® White Nylon Article 01058JG - 100% Nylon (Polyamide) - Facts, Features and Plus Factors

Anchorplait® is a Jimmy Green Marine UK Registered Trademark.

Anchorplait® is manufactured exclusively by LIROS Ropes for Jimmy Green Marine.

Anchorplait® features Easy Splice Markers designed by the Jimmy Green Rigging Team.

The eight-strand construction (two pairs left hand, two pairs right hand) delivers a balanced performance with no twist under tension.

In fact, Anchorplait falls and flakes like a chain.

Anchorplait is the rope that will not cockle - the interlocking opposing pairs resist rotation.

LIROS Anchorplait is the optimum rope for a swinging mooring strop because Anchorplait is the rope that will not cockle.

There is more information on cockling and its damaging effects further down the page.

LIROS Anchorplait:

  • LIROS manufacturing excellence and consistency
  • 100% Nylon (Polyamide)
  • UV stabilised
  • Square braid construction
  • Non-kinking
  • Balanced braiding
  • The eight-strand construction (two pairs left hand, two pairs right hand) ensures a balanced performance and no twist under tension
  • Zero possibility of cockling - the interlocking opposing pairs resist rotation
  • Falls and flakes like a chain
  • Dependable, robust strength
  • Reliable durability
  • Excellent weathering and wear resistance
  • Remains flexible for the duration of its working life
  • Supreme Shock Absorbing Elongation, >20% working load stretch
  • Spliceable for robust, secure attachment

LIROS Anchorplait and Octoplait Nylon Break Load in daN:

10mm 2400daN - 12mm 3300daN - 14mm 4400daN - 16mm 5600daN - 18mm 7000daN - 20mm 8140 daN - 24mm 11800daN

LIROS specify their minimum break loads in Dekanewtons (DaN)

Kg force is a more recognisable illustration of strength, so you can convert the LIROS DaN values as follows:

1 Dekanewton = approximately 1.02 kg force

Therefore, the strength for any given diameter will be higher in kg than in daN, e.g. 11800daN = approximately 12036kg

Plain white LIROS Octoplait Nylon article 01058 with only LIROS tracer yarns is also available.

3 Strand Nylon will suffice if the mooring setup will not allow the boat to swing through 360 degrees in the tide.

The selection process for a mooring strop on a swinging mooring:

  1. Find the column in the table below that best represents your Boat Length Overall.
  2. Compare your displacement with the tonnage listed.
  3. If the displacement is greater than displayed in your column in the table, or your yacht is a multihull, consider moving across to the next column to increase the diameter.
  4. Take advice on local conditions and check the benchmark size from the table below against other similar-sized boats moored in your area.
  5. Look at the mooring configurations on neighbouring yachts with a critical eye and judge whether your setup should be the same.
  6. Consider whether you can make any improvements in terms of mooring convenience and anti-chafe measures.

Permanent Mooring Warps, Strops and Bridles:

  • Single Point generally means a Swinging Mooring
  • Double Point could be, e.g. Fore and Aft between piles
Benchmark Guide for Single (or Double) Point Mooring Strops
Yacht Length Overall < 5 metres 5 - 6 metres 6 - 8 metres 8 -10 metres 10 - 12 metres 12- 14 metres 14 - 16 metres
Approximate length in feet < 16 feet 16 - 20 feet 20 - 26 feet 26 - 33 feet 33 - 40 feet 40 - 46 feet 46 - 53 feet
Displacement in tonnes 0.6 tonnes 1 tonne 2.5 tonnes 5 tonnes 9 tonnes 13 tonnes 16 tonnes
Strop Diameter 14mm 16mm 18mm 20mm 24mm 28mm 32mm

N.B. Use only Anchorplait for swinging moorings - 3 strand lines may 'cockle' when the 'swing' turns against the lay of the rope.

Cockling (unravelling against the lay of the rope)

Cockling occurs when a fixed three strand construction warp is forced to rotate against the direction of the twisted lay, opening up the strands until they distort into 'ears' This will eventually be the case if a yacht continually swings around its mooring 'the wrong way'.

You can sample this with a soft piece of small diameter three strand rope - Twist it tighter, and the rope construction tightens - Twist it the other way, and the strands will soon de. Then the rope will go entirely out of shape, compromising the performance of the warp, with the distinct possibility of failure through rupture.

Video Demonstration of Rope Cockling

This may not look like it can happen in a large diameter strop. However, when a large diameter nylon warp dries out after contact with seawater, the fibres shrink, and the lay of the rope tightens. The result is a stiff rope akin to an iron bar that doesn't look like it could unravel. Still, it certainly can in conditions where the force of the rotational twist in the unlaying direction is both strenuous and persistent.

Cockling cannot happen with Anchorplait, no matter which way the rope is twisted.

Look after our splicing as well as your rope: The three strand splice will be in danger of unravelling if the strop isn't used correctly because once the rope has distorted as far as physically possible without rupture, the rotational force can be transferred to the splice with disastrous consequences.

When you have chosen the rope construction and the diameter, you can get an instant quote online, including all the splicing and finishing, anti-chafe and compensator options.

If you need help with the Custom Build process, try reading our step by step instructions. Custom Build Instructions

Jimmy Green Advisory on Twin Strops for Multihulls:

For wide-span catamarans and trimarans, it will be prudent to use two separate strops shackled together to make a V shape. Another short strop could also be deployed at the apex of the V to make a Y shape.

Read More
LIROS 14mm Anchorplait Nylon Mooring and Anchoring Warps
LIROS 16mm Anchorplait Nylon Mooring Strops
LIROS 18mm Anchorplait Nylon Mooring Strops
LIROS 20mm Anchorplait Nylon Mooring Strops
LIROS 24mm Anchorplait Nylon Mooring Strops
Marlow 28mm 8 strand Multiplait Nylon Mooring Strops
Gleistein-Geo-Square-Polyester Mooring Warps
LIROS 14mm 3 Strand Nylon Mooring Strop
LIROS 16mm 3 Strand Nylon Mooring Strop
LIROS 18mm 3 Strand Nylon Mooring and Anchoring Warps
LIROS 20mm 3 Strand Nylon Mooring and Anchoring Warps
LIROS 24mm 3 Strand Nylon Mooring and Anchoring Warps