Do chain hooks weaken 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 01-10-2014
pdqaltair's Avatar
Senior Member
 
Join Date: Nov 2008
Location: Deale, MD
Posts: 2,143
Thanks: 1
Thanked 30 Times in 30 Posts
Rep Power: 6
pdqaltair is on a distinguished road
Do chain hooks weaken chain?

Not "are chain hooks weaker than the chain they are attached to?" Some are, some are not.

Not "I've heard," "Ultra says," or "chain isn't designed for...."

Actual numbers from a chain manufacturer or scholarly source. The "designed for" argument just doesn't make sense to me, considering MOST binder chains are attached with hooks. Sailors are most certainly the minority.

I've seen lots of numbers on rope and cables re. what weakens them, but not chain (heat and corrosives, of course).
__________________
(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")

"Well, I just climb up to them."

by Joe Brown, English rock climber




To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #2  
Old 01-10-2014
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,559
Thanks: 2
Thanked 83 Times in 81 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: Do chain hooks weaken chain?

Anything that puts a point load on chain will weaken it IF there's enough load to stress the link. But given the variety of what are called "chain hooks" and the variety of loads...If the hook, of whatever kind, is properly sized and does not stress the link it is attached to, how could it possibly weaken the chain?

Given that some chain is more malleable and some link shapes more subject to distortion, I think there's lots of room for "properly sized" and proper tension/loading, so your bottom line answer will depend on the specifics. But within wide ranges, again, if you don't do something to overstress the chain link, how can a chain hook damage it?
Reply With Quote Share with Facebook
  #3  
Old 01-10-2014
pdqaltair's Avatar
Senior Member
 
Join Date: Nov 2008
Location: Deale, MD
Posts: 2,143
Thanks: 1
Thanked 30 Times in 30 Posts
Rep Power: 6
pdqaltair is on a distinguished road
Re: Do chain hooks weaken chain?

I can see this could have 2 answers: high tensile and not.

It simply does not strike me, with out data, that cross loading a link is anymore strenuous than its normal loading. It seems if it was a problem, the chain manufacturers would publish a de-rating table, since the practice is normal and fundamental to the product.
__________________
(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")

"Well, I just climb up to them."

by Joe Brown, English rock climber




To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #4  
Old 01-12-2014
capta's Avatar
Master Mariner
 
Join Date: Jun 2011
Location: somewhere in the Windward or Leeward Islands
Posts: 1,389
Thanks: 13
Thanked 66 Times in 61 Posts
Rep Power: 4
capta is on a distinguished road
Re: Do chain hooks weaken chain?

We use a galvanized chain hook on our 3/8bbb chain to attach the snub line. As the links on bbb are considerably shorter than ht, and the nylon snub acts as an elastic, I certainly can't see that the chain hook could damage the chain in any way. Chain hooks are used in very high load situations (cargo loading, pulling bulldozers, logging, etc) quite often and I have never seen any warnings that they reduce the working load factor at all.
__________________
"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.
Reply With Quote Share with Facebook
  #5  
Old 01-12-2014
jrd22's Avatar
Courtney the Dancer
 
Join Date: Nov 2000
Location: San Juan Islands., WA, USA
Posts: 3,816
Thanks: 3
Thanked 14 Times in 14 Posts
Rep Power: 14
jrd22 will become famous soon enough
Re: Do chain hooks weaken chain?

Since all chain binders use hooks I would think that there would be a lot of warnings if there was an inherent loss of working load when they are used due to liability issues(trucks, shipping, etc).
__________________
John
SV Laurie Anne

1988 Brewer 40 Pilothouse

Reply With Quote Share with Facebook
  #6  
Old 01-14-2014
newhaul's Avatar
islander bahama 24
 
Join Date: Feb 2010
Location: kingston WA
Posts: 803
Thanks: 6
Thanked 24 Times in 24 Posts
Rep Power: 5
newhaul is on a distinguished road
Re: Do chain hooks weaken chain?

Just look at the trucking industry a chain hook or binder hook places essentially the same load on a link as another link does so i rather doubt that it would cause any issues if properly sized for the chain used
__________________
Illegitimus Non Tatum Carborundum.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
Reply


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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Chain to chain connectors on anchor chain kwaltersmi Gear & Maintenance 12 10-16-2013 09:24 AM
Anchor Chain TxLnghrn Gear & Maintenance 9 12-24-2008 05:03 PM
Chain Stopper or Chain Tensioner? 1970Columbia34 Gear & Maintenance 14 03-19-2007 11:43 AM
Chain FritzN Boat Review and Purchase Forum 3 01-07-2007 08:33 PM


All times are GMT -4. The time now is 06:21 PM.

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.