<span class="highlight">Shackles</span> and straps
Submitted: Monday, Feb 28, 2011 at 12:15
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Member - Noldi (WA)
I've just been asked this question, and I did a quick search but could not find the answer to this particular question.
why does the rating on snatch straps always seem to be considerably higher (approx 8 tonne) than on the D
shackles?
I have seen 3 straps break but never a rated shackle fail?
The numbers don't seem to make sence
Rgds
Ian
Reply By: dereki - Monday, Feb 28, 2011 at 12:25
Monday, Feb 28, 2011 at 12:25
Lack of consistency with the standards being applied I believe, but please correct me if I am wrong.
The
shackles are from the rigging arena. So a 3.5T shackle is rated for a safe 3.5T vertical lift. They have regulations where there is some huge safety factor... like 10 times or something, so its breaking strength is maybe 35T.
The snatch strap has the breaking strength written on it... 8000kgs
D
AnswerID:
446856
Follow Up By: Muntoo - Monday, Feb 28, 2011 at 12:50
Monday, Feb 28, 2011 at 12:50
Yep, recovery gear has no safety factor. Whats written on it is its limit.
Rigging gear must pass a safety factor of 10x.
So an 8mm chain, which is rated to lift 2T on a straight leg, has to actually be able to lift 20T brand new.
FollowupID:
719215
Reply By: Member - Noldi (WA) - Monday, Feb 28, 2011 at 12:57
Monday, Feb 28, 2011 at 12:57
Thanks Guys, simple explanation
Excelent
Rgds
Ian
AnswerID:
446859
Reply By: Member - Josh- Monday, Feb 28, 2011 at 13:12
Monday, Feb 28, 2011 at 13:12
The other problem with straps breaking is most straps are use for multiple pulls. A small nick in the webbing often hard to see with the naked eye is all it needs to weaken a strap. Also snatching a fully loaded rig from deep mud could easily go over the rating on most straps. I think most companies say a strap is only good for one pull, after that it's integrity is compromised.
Josh
AnswerID:
446862
Follow Up By: Member - Noldi (WA) - Monday, Feb 28, 2011 at 13:15
Monday, Feb 28, 2011 at 13:15
I have heard that also Josh
I always make sure every one is
well out of the way.
Rgds
FollowupID:
719218
Reply By: AGNI4x4 - Monday, Feb 28, 2011 at 14:54
Monday, Feb 28, 2011 at 14:54
Yep you know when you have a good strap as it pulls the bar of before it breaks.
Only gaggin .................... but funny to see.
AnswerID:
446874
Reply By: ob - Monday, Feb 28, 2011 at 16:57
Monday, Feb 28, 2011 at 16:57
Site Link
may be of some interest
ob
AnswerID:
446894
Follow Up By: ob - Monday, Feb 28, 2011 at 17:01
Monday, Feb 28, 2011 at 17:01
Hmmmmm....that worked
well
Try www.activelifting.com.au/liftingEquipment/
shackles.htm
ob
FollowupID:
719244
Follow Up By: Member - Noldi (WA) - Monday, Feb 28, 2011 at 17:05
Monday, Feb 28, 2011 at 17:05
Thanks OB good site for tech info
Rgds
FollowupID:
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