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-   -   anchor rode (http://www.sailnet.com/forums/gear-maintenance/11217-anchor-rode.html)

maestro 02-03-2005 10:10 AM

anchor rode
 
what size line should my anchor rode be?? my boat 28 ft. displacement 7300lbs. needs a new anchor rode. I have a dansforth attached to 20 ft. of 3/8 chain.now for the nylon???

GordMay 02-03-2005 09:47 PM

anchor rode
 
A 28 Ft moderate displacement (7300#) boat is likely to require about 700 pound working load capacity, 1400 Lbs for a Storm Anchor, or 2100# for a Permanent Mooring.

Various Working Load Limits in Pounds:
½" Three-Strand Nylon Rope = 709# WLL (Stretches to 150%, Good Shock Absorption)
½" Double-Braid = 816 # (Stretches to 130%, Fair Shock absorption)
3/4" Three-Strand = 1598#
3/4" Double-Braid = 1813#
1/4" Hi-Test Chain = 2600#WLL
5/16" Proof Coil Galv. Chain = 1900#
3/8" Proof Coil Galv. Chain = 2650#

Unless it’s very large (you didn’t specify), your Danforth anchor is very likely to be the limiting factor (weak link).

I’d probably use ½" (or 5/8" @ 1114# WLL) Three-Strand Nylon.

FWIW,
Gord

maestro 02-04-2005 02:28 AM

anchor rode
 
thank you Gord...just what I was looking for and exactly what I was going to get. 200 ft. of 1/2in 3 strand nylon , shackled to 20 ft. of 3/8in. chain.....and

you''re right, the anchor is probably the weakest link. I have a 15 lb. and 25 lb. dansforth.(and a small fisherman''s) I''m looking into getting a CQR at some point this year as well ( I sail on Hudson river/Long Island sound where I usually meet mud/sandy mud when anchoring)

GordMay 02-07-2005 12:24 AM

anchor rode
 
I’d look at the “Delta”, as an alternate to the “CQR” - cheaper, and some (including me) say better.

maestro 02-07-2005 02:25 AM

anchor rode
 
thank you, I will

sailnaway 02-27-2005 07:28 PM

anchor rode
 
maestro the specs I am posting are for Sampson three strand rope hope this helps
Product Code Size Dia. - Inches Put-Up Strength Avg. Lbs. Pack Lbs.
603024007583 3/8 75 4,000 2.8
603024010083 3/8 100 4,000 3.7
603024015083 3/8 150 4,000 5.4
603024020083 3/8 200 4,000 7.2
603032010083 1/2 100 7,000 6.7
603032015083 1/2 150 7,000 10.0
603032020083 1/2 200 7,000 13.2
603032025033 1/2 250 7,000 16.5
603032030333 1/2 300 7,000 19.7
603040015093 5/8 150 11,100 16.0
603040020093 5/8 200 11,100 21.3
603040025093 5/8 250 11,100 26.6
603040030093 5/8 300 11,100 31.8
603048015033 3/4 150 15,000 22.1
603048020033 3/4 200 15,000 29.4
603048025033 3/4 250 15,000 36.7
603048030033 3/4 300 15,000 43.9
http://www.samsonrope.com/home/newindex.cfm

This is New England ropes which i use both companies make good rope I just like New England rope better I also use the Sta Set line great stuff
7050-06 3/16" 5 1.0 1,200
7050-08 1/4 " 6 1.5 2,000
7050-10 5/16" 8 2.5 3,000
7050-12 3/8 " 9 3.5 4,400
7050-14 7/16" 11 5.0 5,900
7050-16 1/2 " 12 6.5 7,500
7050-18 9/16" 14 8.2 9,400
7050-20 5/8 " 16 10.5 12,200
7050-24 3/4 " 18 14.5 16,700
7050-28 7/8 " 22 20.0 23,500
7050-32 1 " 24 26.4 29,400
http://www.neropes.com/

Bigger is better but if you are going to be in the bay and inland the 1/2" will do the job. You might think about 5/8 that would be a little overkill but you would have an anchor line that would do the job no problem.

GordMay 02-28-2005 01:03 AM

anchor rode
 
Bigger is stronger, but also less elastic (under comparable loadings), which is an important characteristic in a rope (rope/chain) anchor rode. There’s no point in wildly exceeding the holding power of the anchor (or whatever the ‘weak link’ in the assembly is), at the expense of stretch.

GordMay 02-28-2005 01:08 AM

anchor rode
 
See also Sampson''s not on "Strength" and "Working Load Limits".
http://www.samsonrope.com/home/newrecmarine/standardsstrength.cfm

Billpjr 03-03-2005 12:11 PM

anchor rode
 
1/2" three strand nylon is perfect for that boat...continous strand, hard lay gives highest ratings.

I wouldn''t use braided on anchors because you can''t see core damage if it happens...like from too much stretch.

AlainPOIRAUD 06-19-2005 11:38 AM

anchor rode
 
Everything you wanted to know about your mooring line:

Tuning an anchor rode:

http://alain.fraysse.free.fr/sail/rode/rode_b.htm

and how to splice your rope on your chain:

http://www.bluemoment.com/warpchainsplice.html


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