D Shackle rules

[Steve M Addicted PP Member Find all posts View Profile Close Steve M]

Is this for every where ??

[stevep84 Find all posts View Profile Close stevep84]

I know NSW any new trailer or interstate rego transfer has to have rated safety chains. First I have heard about shackles.

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[Bushbasher Out of control poster! Find all posts View Profile Close Bushbasher]

I noticed that many late model cars with tow bars come with rated shackles. On a side note, during recent AUSTRANS operations here in Broome and Kununurra they found 1 in 4 caravans with break-away breaking systems didn't work. That would certainly put value in having proper rated shackles.

[mjrandom Out of control poster! Find all posts View Profile Close mjrandom]

Having a WLL on shackles has been law for quite some time. I haven't checked but presumably the ADRs or Codes of Practice specify a load rating required based on trailer capacity. First I have heard of anyone being fined though. Mine are HR branded so I need to check if they are stamped with a load rating.

[jonoxplor Member Find all posts View Profile Close jonoxplor]

Small difference, the shackles pictures are bow shackles, D shackles are well, D shaped!

When using straps for example, the strap should sit in the Bow of the shackle, and NOT against the pin!

[AJ120 Out of control poster! Find all posts View Profile Close AJ120]

Small difference, the shackles pictures are bow shackles, D shackles are well, D shaped!

When using straps for example, the strap should sit in the Bow of the shackle, and NOT against the pin!

ARB's vehicle specific rated recovery points are specifically designed so that the strap sits against the pin. I don't think it matters which way round you do it, you would base that decision on how the shackle is attached to the recovery point or whatever else you might be attaching it to.

Cheers Andrew

[BrettM Member Find all posts View Profile Close BrettM]

The strap should not be on the pin, any one that has a rigging ticket will tell you that. The pin should always be on the hook or the metal side and the strap on the curved part of the shackle

[AJ120 Out of control poster! Find all posts View Profile Close AJ120]

Obviously ARB has it all wrong, someone should let them know.

Cheers Andrew

[BrettM Member Find all posts View Profile Close BrettM]

Most of them do it that way AJ, all I'm saying is from a rigging point of view it's incorrect

[AJ120 Out of control poster! Find all posts View Profile Close AJ120]

Most of them do it that way AJ, all I'm saying is from a rigging point of view it's incorrect

Been a long time since I did a rigging course and then it was pretty basic, I wouldn't doubt that the way you guys describe is what a rigger would do. By the same token if a rigger went over even the best practice scenarios for snatch recoveries they would be shocked

The ARB points are probably the only recovery points on the market that would come within a bulls roar of the standards for rigging, and as I said they are designed to have the shackle the other way round.

Anyway that's all getting way off topic, I've had rated shackles on my towbar for years so new laws have no effect on me.

Cheers Andrew

[Ian Reid Advanced Member Find all posts View Profile Close Ian Reid]

May be simplistic but I would have thought the strap on the pin would be best. It would give even stresses right across the width of the straps eye where as the other way puts more stress on the outer edges of the strap. Also the shackle in the recovery point hangs naturally in its neutral position and shouldnt slide under stress which a flat surface will probably do.
Cheers
Ian

[stevep84 Find all posts View Profile Close stevep84]

I found some interesting info on shackles tonight. I had a look at the NTs rules as I'm moving up there next year. Turns out you must have rated shackles up there and it has been that for 4 years.

http://www.transport.nt.gov.au/__dat...s-Jan-2013.pdf

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[LargeInAPrado Member Find all posts View Profile Close LargeInAPrado]

May be simplistic but I would have thought the strap on the pin would be best. It would give even stresses right across the width of the straps eye where as the other way puts more stress on the outer edges of the strap. Also the shackle in the recovery point hangs naturally in its neutral position and shouldnt slide under stress which a flat surface will probably do.
Cheers
Ian

Its not simplistic its basic engineering principles and your right. A shackles load rating is determined in the centre axis

A point load should only ever be on the pin if it can be centred and kept there. It doesnt happen in recoveries.

If you had the strap in the bow it bunches and pulls on the edges first, edge loads reduce overall load rating of straps. If the pin is through the recovery point it then is almost certain to slip to the edge of the pin, therefor taking the overall load axis off centre reducing the load rating of not only the strap but the shackle itself.

ARB is right in application AJ120

[BrettM Member Find all posts View Profile Close BrettM]

Yes that's correct about the load being central on the pin. Another thing is that a shackle shouldn't really be use for snatching as they should never be shock loaded, the WLL on a shackle is rated for lifting. We could go on and on about it and in the end we will all still use shackles for recoveries

[Whitey1 Advanced Member Find all posts View Profile Close Whitey1]

According to Camper Trailer Touring Facebook page, QLD Transport "recommends" rated shackles. Not mandatory apparently. I remember when I got my camper changed over to WA rego from QLD I had to change the chains and shackles to rated ones. That was about 4 years ago.