Anchor warp-how big and how long?

ffiill

Well-Known Member
Joined
5 Sep 2007
Messages
3,283
Visit site
Just setting up a second Bower anchor with about 10 metres of chain then nylon warp.
Planning on using 16mm onto 8mm chain-that has a breaking strain of about 5 tons with the chain not being much more than two tons.
The snatch load on a heavy displacement 34 footer is a little over one ton in hurricane with 10 foot swell.
Do I need it any thicker or could I do thinner say 14 mm-thats just less than dia. of standard copper pipe.
Length-50 m thats about 160 feet or 100 metres at about 320 feet?
3 strand or multiplait?
What do you all think?
Rationally the rode should have no greater breaking load than the chain? but thin rope begins to get difficult to handle although in my case it would be run around the capstain on the windlass?
 
Just setting up a second Bower anchor with about 10 metres of chain then nylon warp.
Planning on using 16mm onto 8mm chain-that has a breaking strain of about 5 tons with the chain not being much more than two tons.
The snatch load on a heavy displacement 34 footer is a little over one ton in hurricane with 10 foot swell.
Do I need it any thicker or could I do thinner say 14 mm-thats just less than dia. of standard copper pipe.
Length-50 m thats about 160 feet or 100 metres at about 320 feet?
3 strand or multiplait?
What do you all think?
Rationally the rode should have no greater breaking load than the chain? but thin rope begins to get difficult to handle although in my case it would be run around the capstain on the windlass?

Mine is same size of boat, but lighter at about 5 tonnes dry. I used 14mm octoplait, mainly coz it's dead easy to splice to 8 mm chain.
 
we used 100m of 20mm 3 strand onto 10mm chain for a 10t boat, mainly because there was a 100m reel on special at the chandlers
 
I would tend to go for thicker, rather than thinner if your cleats could reasonably take a thicker rope. I would also assign it to duel use: towing and anchor warp.

I would not be inclined to splice it to a section of chain for kedge use but rather have a hard eye at the end of the warp.

The reason for going thicker is that thinner rope will stretch more for the same load. In towing this can be a bit of a pain if the stretch is too much as one surges and bobs about due to waves. Stretch is good but too much stretch is not so good when dealing with large loads. I think multi plait stays softer longer than 3 strand nylon, so I would go for that, but if 3 strand was lower priced I would buy that.

I use 100m of 24 mm Nylon, 3 strand, for a 10 tonne (empty) Rival 41C. I have 2 hard eyes spliced each end and open fairleads (other wise the line can not be fed through). The double hard eyes are for convenience but I am not so sure its a good idea to have one on each end.
 
Last edited by a moderator:
Just setting up a second Bower anchor with about 10 metres of chain then nylon warp.
Planning on using 16mm onto 8mm chain-that has a breaking strain of about 5 tons with the chain not being much more than two tons.
The snatch load on a heavy displacement 34 footer is a little over one ton in hurricane with 10 foot swell.
Do I need it any thicker or could I do thinner say 14 mm-thats just less than dia. of standard copper pipe.
Length-50 m thats about 160 feet or 100 metres at about 320 feet?
3 strand or multiplait?
What do you all think?
Rationally the rode should have no greater breaking load than the chain? but thin rope begins to get difficult to handle although in my case it would be run around the capstain on the windlass?

3 strand nylon will harden over time & when it stretches also will not be easy to use / handle.
octoplait / anchorplait is the read deal
 
If you want it to go over your windlass check whether your gypsy will take it. They don't always take Octoplait. The correct size warp for that size chain is 14mm which you can splice if you are going to use it as a permanent warp. Hard eyes are OK if you want the warp to be used for other purposes as well. For details of recommended warp sizes and instructions on splicing see the Jimmy Green website.
 
Somewhere I do have about 50 m of old three strand nylon and its almost impossible to splice because its stiffened up and tightened down so much.
Thing is multiplait is a lot more expensive-a full 200 metre reel from ropes and twines is best deal but I do not need that much-still got half a reel of one inch polysteel I bought to put together a mooring stuck in my garage!
I agree that having hard eyes spliced in both ends reduces its flexibility.
The plan has always been to resite the main chain locker by slightly angling the chain pipe backwards allowing the main chain to occupy a deeper lower space under the forward end of the v berth.-then add additional deck pipe and set up a reel forward in the bow.
 
Top