Strap and Chain Safety

   / Strap and Chain Safety #11  
Something like this can always happen. IMG_0474.JPGIMG_0473.JPG
 
   / Strap and Chain Safety
  • Thread Starter
#12  
I am surprised that a strap could whip back like that.

I have concerns that adding a shackle or other metal object to the end of a strap will just turn that object into a hard missile when something goes wrong.
 
   / Strap and Chain Safety #13  
I am surprised that a strap could whip back like that.

I have concerns that adding a shackle or other metal object to the end of a strap will just turn that object into a hard missile when something goes wrong.
The recovery straps are stretchy, like a rubber band, and if the connection on one end breaks, it snaps with great speed. Then you add the weight of a clevis and maybe a receiver hitch insert on the snapping end..........very deadly. I remember seeing a video of a clevis going completing through a SUV's rear window, just missing the passenger's head, and exiting the windshield.

Do NOT use a recovery strap to pull out a rusted-in hitch insert!!!!!!!!!!!
 
   / Strap and Chain Safety #14  
I think there is more to the story in that second photo. It appears that the strap went through the windshield and headrest.
Anyway, we used to drape turnout coats over winch cable to dampen the cable if it snapped. All things considered I prefer chain over cable or straps.
 
   / Strap and Chain Safety #15  
Yeah.... Most 4WD recovery instructions for winch use recommend heavy rug/mat/"apron" (winch line dampener) filled with rocks so if cable or if shackel or strap breaks cable does not fly like a whip and decapitate somebody...

Dale
Watch these people trying to come up with a solution of strap snapping. A 5 or 10 pound mid strap weight did not slow it up. In fact, those weights became deadly projectiles themselves.
Testing - Vehicle Recovery Strap Recoil Diffuser - YouTube
 
   / Strap and Chain Safety
  • Thread Starter
#16  
I just saw a video of a guy recommending chains for pulling things. He said they couldn't store energy and snap. Thing is, there are also videos of chains snapping and flying through the air, and this guy is in one.

It doesn't matter if the chain doesn't store energy. If it's hooked to something that stores energy, it can still be propelled through the air. If you were to connect a chain to a spring on the front of a car and then try to pull the car, and then the chain snapped on your end, the spring would hurl the chain. A lot of things can act like springs when they're under great tension.
 
   / Strap and Chain Safety #17  
Chains will store energy and fly if the pull stretches the links. I've done it with an overstressed 1/4 chain, and lost a windshield.

Bruce
 
   / Strap and Chain Safety #18  
I’ve seen first hand a attachment point break when using a 3” recovery strap, they were using a pin clevis like this one , when it came loose it shot the 3/4 pin about 40 ft through the tread on a newer mud tire on the truck pulling on the strap. IMG_0476.JPG
 
   / Strap and Chain Safety #19  
I just saw a video of a guy recommending chains for pulling things. He said they couldn't store energy and snap. Thing is, there are also videos of chains snapping and flying through the air, and this guy is in one.

It doesn't matter if the chain doesn't store energy. If it's hooked to something that stores energy, it can still be propelled through the air. If you were to connect a chain to a spring on the front of a car and then try to pull the car, and then the chain snapped on your end, the spring would hurl the chain. A lot of things can act like springs when they're under great tension.

The claim that chains don't store energy is BS... Have chain marks up tailgate of my Chevy PU that verifies stored energy in chain can whip around and cause severe damage....

Dale
 
   / Strap and Chain Safety #20  
Watch these people trying to come up with a solution of strap snapping. A 5 or 10 pound mid strap weight did not slow it up. In fact, those weights became deadly projectiles themselves.
Testing - Vehicle Recovery Strap Recoil Diffuser - YouTube

Ummm... Look at speed of green tractor with orange orange (20,000 pound) straps fail....look at speeds of green tractor when yellow (their product) fails... Inertia of pulling tractor figures in a lot in these tests....

But granted if you put enough energy into any strap it can fail.... Using some sort of dampener might help under less abusive "test" conditions...

Dale
 
 

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