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"Snatch" rescue dangers

8.4K views 91 replies 28 participants last post by  LoneWombat  
#1 ·
Hi Guys,

Just thought I'd share this little nugget with you!
Recently working on a property where the station employee travelling in front of me got his Patrol (CRD Cab Chassis) bogged up to the axles.

We recovered the trailer with my winch (to get it out the way as I could only get to the rear of the bogged vehicle) before reversing back in and setting up for a snatch on the bogged ute.

I had an ARB snatch strap and he had a very HD looking extension strap - although not new. We hooked them together with a 12ton bow shackle and use the tow bar receivers on both vehicles as connection points - NOTE NOT THE TOW BALL!!!!

Away we went - BANG - and this is what we ended up with:

Image




That is a picture of the dent left in the TOW BAR FRAME by the Bow Shackle on the recoiling snatch strap after the extension strap snapped - bit scary when you think that is 5 or 6mm steel AND on the corner! Amazing how much it deformed the tube.

Now before I get flamed - both vehicles has canopy backs so there was NO danger of the shackle hitting an occupant AND we had a drizabone coat over the strap to TRY and slow any recoil.

Just thought it an interesting reminder as to WHY you take care when doing these recoveries!

Cheers

Stocky
 
#3 ·
Ha Ha, nice 1... Geez the dry as a bone should have slowed it down. Goes to show what those fluro ones would do "bugger all" try a wet towel next time. Ive had 3 snatch straps break on me, all in a row with the same guy I was trying to towing out. Its just happens.
 
#4 ·
Yes i would have thought the drziabone AND the 15m of extension strap still attached to the shackle would have taken more sting out of it. The extension strap broke less than a foot from the bogged vehicle!

Thanks for the other pic - handy idea I didnt think of!

Stocky
 
#8 ·
Yeah thats why I refuse to snatch with a shackle anywhere in the mix. Two good hooks and even 3 or 4 with a bridle if possible with a good damper and everyone that doesn't need to be in or around vehicles well, well, well clear.

Slow tug first, then a little snatch and work up slowly, don't go like a bull at a gate the first time around, it may not need it.

Also if the ute was bogged to the axles a couple of shovels and 15 minutes of hard work would have been good prep before yanking the ****tery out of it with the snatch. :p
 
#10 ·
Update guys - the snatch was AFTER 30 min of 2 blokes with 2 shovels digging - not a fun job up to our knees in mud. The trailer alone took another 20 minutes to dig our before we could winch it out.

There was no "macho" involved - just needed to get out and get our work done.

We did try nice little tugs first but had to go the whole hog as it was our only remaining option - but as pointed out we did take every precaution we possibly could as we where both aware of the *potential disaster*.

The ground had dried to a nice crust with soup underneath - we drove across over 200m of it an just hit this one patch that didnt look any different - if anything the bloke would have known the area better than me as he has lived there 10 years - I was just hanging back and letting him lead the way.

I've always been wary of using the snatch strap - ALWAYS use the receiver pin not the tow ball, ALWAYS drap a coat or tarp or something over the strap to slow it down if it recoils and NO ONE apart from drivers ANYWHERE near the operation.

We tried to do a "text book" recovery with all the safety precautions possible at the time ith both drivers aware of the dangers - the post was just a wake up to all about how much force can be inflicted by a recoiling snatch strap.

Stocky
 
#13 ·
Sounds like you did everything correct, and people use shackles all the time, I just don't if it is at all possible to avoid it and if I do I only tow, I will not snatch with a shackle.

I'm pretty sure most 4wd trainers would say a big no no to joining straps or extension straps with shackles in a snatch recovery, but personally I say no to them all together.

Ah well lesson learned for next time, and as said above with that kind of damage who can complain, we've all seen the pictures and videos of snatches when they have gone REALLY wrong. I bet your glad you had the damper on there otherwise god knows where it would have ended up! :confused:
 
#14 ·
You did a snatch recovery using a winch extension strap lol.
No wonder the bloody thing snapped!

THEY DONT STRETCH DO THEY? ;)

Snatch straps only joined together is the only way it should be done.

Mind you using an extension strap for towing a vehicle out of a bog is ok, they are'nt design for shock loads.
 
#17 ·
sudso said:
You did a snatch recovery using a winch extension strap lol.
No wonder the bloody thing snapped!

THEY DONT STRETCH DO THEY? ;)

Snatch straps only joined together is the only way it should be done.

Mind you using an extension strap for towing a vehicle out of a bog is ok, they are'nt design for shock loads.
ONE snatchy and ONE winch extention strap = OK

2X snatchys = too much give
2x winch extention strap = no give
 
#18 ·
Bad Juju said:
ONE snatchy and ONE winch extention strap = OK
Not ok. The incident shows why. The extension strap has no give once 3 or 4 times the load is applied to it by the snatch strap.
 
#19 ·
sudso said:
Not ok. The incident shows why. The extension strap has no give once 3 or 4 times the load is applied to it by the snatch strap.
Give is handled by the snatchy same as usual.

load would be equal, there is no mechanical advantage to bias the load either way.

Maybe strap was wet, old or damaged in some way.


It seems the only wrong thing here is the method used to join straps.
 
#20 ·
Seems there is some misunderstanding still about how snatch straps are rated, 9000lb snatch will pull a load of 9000lb when under full tension, this is a dynamic load meaning it will have a muliple of this number, an extension strap will not have a dynamic load factor as high as the snatch for the same loading 'figure'. I would have thought a 12000lb extension strap would be ok with a 4000lb snatch strap. Am I wrong?

If you can calculate kinetic energy you can figure out these multiples depending on how much your car weighs and its speed.
 
#21 ·
stocky6409 said:
We tried to do a "text book" recovery with all the safety precautions possible at the time ith both drivers aware of the dangers - the post was just a wake up to all about how much force can be inflicted by a recoiling snatch strap.

Stocky
Every text book ive read on snatching techniques & everything they teach you in training is NEVER put a shackle in the middle. Tie them properly together.
 
#23 ·
snatch strap recovery

So in my way of thinkng, and I do a lot of thinking, the recoil of the snatch strap was too great a load for the extension strap which has minimal give. you should NEVER mix them. It's all been a lucky lesson for every one;)
 
#24 ·
THE FERRET said:
So in my way of thinkng, and I do a lot of thinking, the recoil of the snatch strap was too great a load for the extension strap which has minimal give. you should NEVER mix them. It's all been a lucky lesson for every one;)
I Disagree, without the shackle in there there is no problem, there would have been no danger with people at a safe distance.

They can be mixed if tied together properly.
 
#26 ·
Goes to show the whole dampening idea is a hot load of poop. The only thing good about the so called dampener over the strap/cable is so that is clearly visable to people in the area. Have seen the aftermath of a daul cab work vehicle in simular situation. Only using one strap. It punched the shackle through the back of the tailgate then through the back of the cab just above the back windscreen. Luckily no one injured.