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Just one adjustment i would make to my earlier post today - I don't know what "WWL" is?

Anyway, what it should have said is "WLL" (third line) = Working Load Limit,
and then "For that reason I...

Been away doing a few other things in life.

To further clarify what I say in the "long post" - every SAFE mechanical system must have a working limit (whether it is known as "SWL" or "WWL").

A...

This post is long, but I think all of it has to be said.

The way this thread has been progressing opens a window on why people get killed and injured recovering vehicles.

Mechanical Systems
...

This post is long, but I think all of it has to be said.

The way this thread has been progressing opens a window on why people get killed and injured recovering vehicles.

Mechanical Systems
...

Have to disagree with the idea that a cargo barrier will stop a 200kph shackle.
They are simply not designed for that.

The post by MudrunnerDT's post - Recovery - The Fundamentals gives a fair idea that 9000Kg may not be extraordinary in some circumstances.
I don't know how MudrunnerDT calculated his figures, but...

This might not be what you had in mind when starting the thread, but it might be a help.

Seems that “spot the dummy” is popular. But what is a safe standard recovery “system” ?

I’ll jump in the...