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[Riley Casey]

Also reminds me how much I'd like to learn to weld.

https://www.youtube.com/watch?v=ifyJjQXOttE

[Brian Adams]

Also reminds me how much I'd like to learn to weld.

https://www.youtube.com/watch?v=ifyJjQXOttE

I saw this yesterday, and it was super interesting. Crazy that no one had done it before! It convinced me to start putting a twist in my straps. I'm surprised that his cylinder survived the abuse he put it through.

Also, normal welding isn't that difficult to learn. It's kind of like playing guitar: the first step is buying one, or borrowing one from a good friend. Then play around until you get the hang of it.

The first welder I bought was a Hobart 140, and I still use it occasionally. It's a good machine, and I've gotten a lot of mileage out of it. I use it with flux core wire, and I use gas with my larger Lincoln MIG. My next step is finally learning to use the TIG welder I've owned for a few years. One of these days!

[Brian Jojade]

What this test did is pointed out that the weak point in the strap system is the ratchet mechanism, especially when adding a load as fast as he did.  Yes, that's going to create significant friction at that point in the strap, and the excessive heat he indicated. The heat caused the strap to weaken and fail.

He also noted that the crease from the twist was also warm, indicating that it was weakening the strap.

Now, my wondering would be, if pressure was not applied as quickly, creating less sudden heat build up at the point of the ratchet, would the results be any different?

[Tim McCulloch]

What this test did is pointed out that the weak point in the strap system is the ratchet mechanism, especially when adding a load as fast as he did.  Yes, that's going to create significant friction at that point in the strap, and the excessive heat he indicated. The heat caused the strap to weaken and fail.

He also noted that the crease from the twist was also warm, indicating that it was weakening the strap.

Now, my wondering would be, if pressure was not applied as quickly, creating less sudden heat build up at the point of the ratchet, would the results be any different?

The ratchet mechanisms seemed to be largely intact - the strap failed at the point it begins to wrap around the outer layer of take-up.  I expected the steel bits to come apart before the strap failed...

[Mac Kerr]

Also reminds me how much I'd like to learn to weld.

https://www.youtube.com/watch?v=ifyJjQXOttE

Yeah, Jason makes a lot of cool heavy duty stuff. Great welding accessories. I've been watching his channel for about a year I think.

Mac

[John L Nobile]

That was very well done. And I found it very interesting.

[Dave Garoutte]

+1 on the poor cylinder flopping around.
It's interesting that the ratings were pretty correct.
Also that they all failed at the ratchet (except the knot), maybe a slight stress riser from touching the side of the ratchet.
I think the heat was a result of the failure, not the failure from the heat.
Otherwise the wet one would have lasted longer(water cooled).

[Chris Hindle]

+1 on the poor cylinder flopping around.
It's interesting that the ratings were pretty correct.
Also that they all failed at the ratchet (except the knot), maybe a slight stress riser from touching the side of the ratchet.
I think the heat was a result of the failure, not the failure from the heat.
Otherwise the wet one would have lasted longer(water cooled).

I see the failure being at the point where the strap is most not-flat.
The knot for sure, and also where the strap transitions from flat to wound.
A sharp edge would also be suspect.
When I use them, I always want 5 or 6 turns on the spool.
I would expect the wet strap to stretch more, but fail in the same way as dry.
I expected the similar breaking on the twisted tests.
He stated he was testing for extreme conditions, as in an accident induced shock load.
He done good.
Chris.

[Erik Jerde]

Coming from a climbing background where lots of stuff gets broken by pull testing in the name of science none of it was particularly surprising.  I’d like to see it compared to a traditional pull test rig and done with a statistically significant sample size.  N=1 is pretty useless since you can’t begin to detect outliers.

[Jeff Bankston]

For 2" and wider I use Vulcan ratchet straps.

http://www.truckntow.com/ratchet-straps.html

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