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Tool Talk Discussion Forum

Quality of Log Chain

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Glenn F.

03-13-2008 13:30:15

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I'm looking to buy more chain to be used in securing tractors, etc. on my trailer.

How is chain quality/strength indicated? There has to be a standard. Is all new chain marked?

Thank you,
Glenn F.

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Bret4207

03-15-2008 06:31:15

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Re: Quality of Log Chain in reply to Glenn F., 03-13-2008 13:30:15

FWIW- Grade 70 chain isn't required by Federal DOT load securement regs. The regs required the tie downs meet the working load limits needed for the particular load you're securing. Grade 70 is just the easiest or most common hi strength chain to find at most available outlets, kinda like Grade 8 bolts are the best available to most of us. There are higher grades out there, but they aren't common.

All this makes no difference to the issue at hand, I just hate seeing folks confused on this stuff. Oh, and your state laws may be more stringent than the Fed laws. Always a monkey wrench to throw in the gears!

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dlplost

03-15-2008 03:26:27

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Re: Quality of Log Chain in reply to Glenn F., 03-13-2008 13:30:15

all high grade new chain is required to have the grade number stamped on approximately 1 link per foot.
grade 70 (minimum allowed by DOT most anywhere) will have "7" or "P7" or something like that forged into a link every so far.

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rockyhawaii

03-14-2008 22:04:48

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Re: Quality of Log Chain in reply to Glenn F., 03-13-2008 13:30:15

In my towing catalogs the Chinese-made chains carry a warning "Not for use where human safety is a concern." Yet the chain is graded the same as the American stuff.

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Greygoat

03-14-2008 07:46:35

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Re: Quality of Log Chain in reply to Glenn F., 03-13-2008 13:30:15

I believe that there is a DOT standard, or if
you get stopped, and inspected, you can get
fined. Commercial Drivers License test book
should tell what it is!

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circus

03-13-2008 19:56:23

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Re: Quality of Log Chain in reply to Glenn F., 03-13-2008 13:30:15

I've found finished chains (with hooks) cheaper than equivalent chains by the foot. Who knows why.

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macco

03-13-2008 19:24:34

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Re: Quality of Log Chain in reply to Glenn F., 03-13-2008 13:30:15

Grade 70 is best bang for your dollar, plus D.O.T. approved. I buy a lot of grade 70 (construction business) for averrage use. I buy grade 80 for overhead lifting (pricey) and keep that chain well marked so it doesn't get beat up (dragged on concrete or wrapped around sharpe edges). My favorite chain in shop is 5/32 grade 100. Super strong, compact and lite. Everyone needs several of these in there tool box.

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Puddles

03-14-2008 05:02:00

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Re: Quality of Log Chain in reply to macco, 03-13-2008 19:24:34

According to the rigging chart that I posted the numbers off, Grade 3 is �proof coil� used for general purpose. Grade 4 is �high test� used for lashing or when you need extra strength. Grade 7 is �transport� for lashing loads to be hauled on the highway. Grade 8 is �alloy�. Alloy is the only chain approved for overhead lifting. :o)

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Glenn F.

03-14-2008 09:30:16

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Re: Quality of Log Chain in reply to Puddles, 03-14-2008 05:02:00

So then the 43 graded HF chain T-Bone refers to is probably actually 4.3...?

Glenn

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Puddles

03-14-2008 13:31:20

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Re: Quality of Log Chain in reply to Glenn F., 03-14-2008 09:30:16

I don�t know Glenn; chain is kind of confusing to me unless I see a tag with the rating on it. Which is required to be OSHA compliant. I�m not a big believer in using chains for rigging, but it does have its place like handling beams all day. The sharp edges of beams will kill wire-rope chokers in no time!

If T_Bone recommends something you can bet the farm it will work! I�ve known him for years; have yet to see any bad advice! :o)

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Puddles

03-14-2008 13:46:55

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Re: Quality of Log Chain in reply to Puddles, 03-14-2008 13:31:20

Glenn this is what I�d much rather rig with! :o)

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T_Bone

03-14-2008 23:57:44

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Re: Quality of Log Chain in reply to Puddles, 03-14-2008 13:46:55

Hi Puddles,

WOW, what a impressive rigging pic! How would you have liked to been the weldor on the "T" joint? I can hear it now from the boss "Ya, that should only take a couple hours to weld"...LMAO

I was not recomending the grade 43 for DOT load binding but just stating what HF had on sale.

All the DOT grade 70 that I've seen lately has "70" stamped on each link and the hooks.

******************************************

Hi Glenn,

I did a quick google search for "DOT approved chain" and returned two cable/chain mfg hits and reading thru that, the grade43 chain is grade4 classed and grade70 is also grade7 classed.

As the others have stated, to be DOT approved the chain must be grade70.

T_Bone

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Puddles

03-13-2008 17:15:33

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Re: Quality of Log Chain in reply to Glenn F., 03-13-2008 13:30:15

Hi Glenn here are some numbers for you: Grade 3 Grade 4 Grade 7 Grade 8
1/4 1,300# 2,600# 3,150# 3,500#
5/16 1,900# 3,900# 4,700# 5,400#
3/8 2,600# 5,400# 6,600# 7,100#
1/2 4,500# 9,200# 11,300# 12,000#
5/8 6,900# 11,500# 18,100#
3/4 10,600# 16,200# 28,300#

Hope this helps ya!

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Puddles

03-13-2008 17:17:55

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Re: Quality of Log Chain in reply to Puddles, 03-13-2008 17:15:33

That didn�t show up like it was typed. :o(
For 5/8-inch, and �-inch there is no weight rating for grade 7 chain!

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NBAllen

03-13-2008 13:59:54

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Re: Quality of Log Chain in reply to Glenn F., 03-13-2008 13:30:15

You will want Grade 70 (P7) chain. Each link should have a raised mark of "P7" on a small flat area, opposite the weld joint.

Minimum size is 5/16", 3/8" is better, but weighs more when packing it around.

Even chain made in China does (well, should) meet the standard, if so marked.

Buy from a reputable supplier.

Nathaniel

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Not Is My Real Name

03-14-2008 08:15:11

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Re: Quality of Log Chain in reply to NBAllen, 03-13-2008 13:59:54

Why would the junk chain from China, be any different from all the rest of the junk they send over here?
Just because they can stamp the numbers into the link, doesn't mean that it meets any of the required quality standards.

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T_Bone

03-13-2008 16:21:26

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Re: Quality of Log Chain in reply to NBAllen, 03-13-2008 13:59:54

Hi Glen,

HF has 3/8" x 14ft grade43 chain on sale for $12.99eh. Grade70 5/16x20ft, $20

Grade70 chain has approx 1/3 more WLL rating than grade43 for a given size.

T_Bone

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flashback

03-13-2008 18:38:48

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Re: Quality of Log Chain in reply to T_Bone, 03-13-2008 16:21:26

Asa I recall from my days at sea, there are lots of grades of chain, however in marine use their are 4 basic chains, standard, hi test, BBB and transport.
each hi test link must be marked (as stated above )HT on the weld. it is much stronger then standard at the same size. BBB has more links per foot and has a dinite use in some winches. Here is a comparison----- My boat weighed upward of 28000 lbs and by rule would need 3/8 inch chain. However, I used 5/16 hi test that was just as strong and weighed a lot less when pulling. If you are concerned and have extra heavy equipment woould go for transport grade Which I believe is grade 8 Jack

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T_Bone

03-15-2008 00:05:06

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Re: Quality of Log Chain in reply to flashback, 03-13-2008 18:38:48

Hi guys,

I have to quit using the "moderen view" to reply to any thread as it sure makes it appear that I was disagreeing with Allen when in fact all I was doing is replying to the thread topic.

I have no idea why of why it linked my post under NBAllen post.

Sorry Allen!

T_Bone

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