Anchor Chain - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 12-23-2008
TxLnghrn's Avatar
Ignoring Trolls in 2009
 
Join Date: Apr 2008
Location: Houston, TX
Posts: 453
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
TxLnghrn is on a distinguished road
Anchor Chain

In looking at my proposed new anchor setup, the recommended chain is 5/16.

I won't mention the anchor to avoid the usual thread diversion.

We will not be utilizing a windlass in the near future (if ever on this boat).

ACCO 5/16 BBB has a SWL of 7600 lb, ACCO 5/16 G40 has 11600 SWL and the ACCO 1/4 G40 has a SWL of 7750.

Cost is a minor issue here but weight savings for the Admiral on the bow might be a larger issue. Acco G40 1/4 is .74 lb/ft, Acco 5/16 BBB is 1.2 lb/ft.

Does 0.5 lb/ft make a difference?
Would there be a problem with utilizing a 1/16 smaller than recommended chain on my new anchor?

Note to Rockter: Notice that I used lb/ft not lbs/ft?

Michael
__________________
S/V Anything Goes
1987 Pearson 31-2
Hull #15
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 12-23-2008
Senior Member
 
Join Date: Nov 2002
Location: New York
Posts: 5,780
Thanks: 0
Thanked 14 Times in 14 Posts
Rep Power: 15
bubb2 has a spectacular aura about bubb2 has a spectacular aura about bubb2 has a spectacular aura about
I would recommend using the G40 just because it is stronger. Probability does not matter but I would sleep better knowing it. Weight saving, how many "feets" (g) are we talking about?

The bigger question, The Admiral is handling the anchoring chores? You are a lucky man.

Last edited by bubb2; 12-23-2008 at 09:53 PM.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 12-24-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
I'd go with the 5/16" G40, rather than the BBB or the 1/4". Going undersized or understrength with ground tackle is just foolish.

Get a good chain pawl if you're not getting a windlass to start with. This will make hauling the sucker back on deck a lot simpler. Also, you probably don't need all chain, which would probably hurt your boat's performance. Get about 60' of chain and splice it to 250' of octo-plait nylon. Don't use a thimble between the nylon and the chain, or when you get a windlass, you'll be regretting it.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 12-24-2008
Senior Member
 
Join Date: Nov 2002
Location: New York
Posts: 5,780
Thanks: 0
Thanked 14 Times in 14 Posts
Rep Power: 15
bubb2 has a spectacular aura about bubb2 has a spectacular aura about bubb2 has a spectacular aura about
Michael, this is a chart from New England rope showing the breaking strength of 3 strand nylon line. If you are not going with a all chain rode, check to see the breaking strength of the size of line you are planing to use. I never have seen a good reason to use chain that has a 12,000lbs breaking strength with line that breaks at 7,500.
SizeWeightTensile
lbs/100'g/mlbskg
3/16"1.014.91,200545
1/4"1.522.32,000908
5/16"2.537.23,0001,362
3/8"3.552.14,4001,998
7/16"5.074.45,9002,679
1/2"6.596.77,5003,405
9/16"8.2122.09,4004,268
5/8"10.0148.812,2005,539
3/4"13.6202.416,7007,582
7/8"18.7278.323,50010,669
1"26.4392.829,40013,348
1-1/8"30.6455.334,00015,436

Last edited by bubb2; 12-24-2008 at 07:48 AM.
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 12-24-2008
Senior Member
 
Join Date: May 2004
Location: Long Is.
Posts: 329
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
gc1111 is on a distinguished road
Just a reminder that the effectiveness of chain in an anchor system is due to the weight of the chain. My advice if you need higher strength is to go with bigger chain. This is also why the mis-match of rope/chain strength might not be the main consideration.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 12-24-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Generally, most windlasses will require rope twice the diameter of the chain size. If you go with 1/4" chain, you'll be limited to 1/2" rope if you get a windlass, or plan on getting a windlass later on.

5/8" rope has about the same SWL as 5/16 G40 chain.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 12-24-2008
Senior Member
 
Join Date: Aug 2006
Location: Arlington, VA
Posts: 1,812
Thanks: 0
Thanked 4 Times in 4 Posts
Rep Power: 10
btrayfors will become famous soon enough btrayfors will become famous soon enough
Michael:

Those SWL (safe working load) figures you cite are WAY TOO HIGH! No way a 5/16" HT chain has a SWL in excess of 11,000 lbs. It should be more like 3,900 lbs.

I think you may have read the specs wrong...perhaps in the West Marine catalog listing where they don't know how to place commas correctly :-)

Bill
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 12-24-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Bill—

I believe he's accidentally written the breaking loads not the SWLs...
Quote:
Originally Posted by btrayfors View Post
Michael:

Those SWL (safe working load) figures you cite are WAY TOO HIGH! No way a 5/16" HT chain has a SWL in excess of 11,000 lbs. It should be more like 3,900 lbs.

I think you may have read the specs wrong...perhaps in the West Marine catalog listing where they don't know how to place commas correctly :-)

Bill
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 12-24-2008
TxLnghrn's Avatar
Ignoring Trolls in 2009
 
Join Date: Apr 2008
Location: Houston, TX
Posts: 453
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
TxLnghrn is on a distinguished road
Thanks all for the replies.

Bubb,
Haven't got her to the bow on anchor duty yet, but I can always hope. After all I'm a modern guy who believes in equal rights.

Dawg,
Your input as always is both helpful and appreciated.

Bill,
You are right, I misread on the WM website secondary to poor comma useage. We will have to send them to the grammer thread.

So the end result of all this. I would probably be safe with 1/4 inch G40 and 1/2 inch line, but will most likely go with 5/16 G40 and 5/8 line.

Merry Christmas to all.

Michael
__________________
S/V Anything Goes
1987 Pearson 31-2
Hull #15
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 12-24-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Merry Christmas Mike... good luck convincing the Admiral to man the anchor line...
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



All times are GMT -4. The time now is 10:40 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.