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Rock Crawl competition

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albsvx:
I guess my ignorant, non-farmboy ass isn't convinced that a chain will always fall, and will not have any recoil ... also not convinced that a broken chuck of link couldn't become a dangerous projectile.

somebody needs to send this in to mythbusters... :)

Gastank:
As far as the whole chain to recovery strap issue.... I carry a military 8' recovery and the "orange chain of freedom" I have seen a chain break... I have also seen a frame break from a chain, each instance the chain did recoil but not to the point that I would stop using it... you just have to be mindful that it can happen. The recoil of the chain was far less than that of a winch using steel line. and we all know what that's like.

reg:
got some info from pirate 4x4

Chain

Another piece of gear you see on the trail all the time.  It can be extremely useful and versatile, but is very often misused.  If chain is going to be used anywhere in a recovery operation (and personally, I think this should be avoided if possible, because of the hazards, and most importantly because often grade, strength, and condition are difficult to verify), it should only be Grade 80 Alloy Steel chain of a size suitable for the task.

Chain for alloy steel chain slings shall conform to the requirements of ASTM A391/A 391M, Standard Specification for Grade 80 Alloy Steel Chain. Rated
loads for alloy steel chain slings shall be based on a minimum design factor of 4

Requirements for attachments to alloy steel chain slings follow:
1. Hooks, rings, oblong links, pear-shaped links, mechanical coupling links, or other attachments shall have a rated load at least equal to that of the alloy steel chain with which they are used.

Inspection:
Chain and attachments should display no wear, nicks, cracks, breaks, gouges, stretch, bends, weld splatter, discoloration from excessive temperature, or excessive throat opening of hooks. Chain links and attachments shall hinge freely with adjacent links. Latches on hooks, if present, should hinge freely and seat properly without evidence of permanent distortion.

Operating Practices.
Operating practices and guidelines for the use of alloy steel chains are as follows:
1. Chain having suitable characteristics for the type of load, hitch, and environment shall be selected.
2. The weight of the load shall be within the rated load (working load limit) of the chain.
3. Chains shall not be shortened or lengthened by knotting, twisting, or other methods not approved by the chain manufacturer.
4. Chains that appear to be damaged shall not be used unless they are inspected and accepted as usable in accordance with the periodic inspection requirements stated above.
5. The chain shall be hitched or rigged in a manner providing control of the load.
6. Sharp corners in contact with the chain should be padded with material of sufficient strength to minimize damage to the chain.
7. Portions of the human body should be kept from between the chain and the load and from between the chain and the winch hook.
8. Personnel should stand clear of the recovery.

9. Shock loading is prohibited.
10. Chain should not be pulled from under a load when the load is resting on the chain.
11. Chains should be stored in an area where they will not be subjected to mechanical damage, corrosive action, moisture, extreme heat, or kinking.
12. The load applied to the hook should be centered in the bowl of hooks to prevent point loading on the hook, unless the hook is designed for point loading.
13. Chains should not be dragged on the floor or over an abrasive surface.
14. When used in a choker hitch arrangement, chains shall be selected to prevent the load developed on any portion of the chain from exceeding the rated load of the chain sling components.
 




from here
http://www.pirate4x4.com/tech/billavista/Recovery/index.html




after reading the article I agree that chains are almost impossible to verify their strength/ load cap.  therfore clubs would rather not allow them then be liable for breakage.  so it is safer by "idiot proofing"   

Kral4me:

--- Quote from: albsvx on January 09, 2008, 10:05:07 PM ---I guess my ignorant, non-farmboy ass isn't convinced that a chain will always fall, and will not have any recoil ... also not convinced that a broken chuck of link couldn't become a dangerous projectile.

somebody needs to send this in to mythbusters... :)

--- End quote ---

How sweet would that be?!

Announcer: "Our next myth to bust was sent in by JT4x4 of CT...."

LOL.

Reg I don't know what to tell you. I always seem to err on the side of caution. I have to agree, I don't think I would let someone tow me/tug me with a chain  :P Of course...there might be times where I don't have that luxury of option LOL!

Rebell Bull:
Hey ya'll this is another farm boy ass just putting in his two cents.  Well lets see, I have broken four recovery straps with the loops that I bought at TSC(Tractor Supply Company for all you city folk). Not sure of there rating, but were four inches wide, double ply nylon webbing. I have broken lots of shitty rope when I didn't have a good piece and needed to free something. I have broken zero chains and I have bent frame on my 1984 chevy 3/4 ton pick up. I personally love the chain, you don't get that pull a little then stretch the strap to point of snapping then finally hopefully move vehicle. With a chain you get take out slack, make it tight, give it gas and you just pulled it out. Love the chain. Not to discredit the straps or winch cables they work good too, when they don't break, but they don't last as long and I flat get scared when I see those things stretch(sp). I have seen chains break too, but usually someone didn't hook them right and instead of hooking over the chain, they went through the middle of an eye, or went cheap and bought shitty chain.

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