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My thinking was that, from all the research I did, a barrier is supposed to act as a sort of big metal net and deform during an impact, absorbing the energy instead of transferring it to the vehicle body, hence the little not-very-strong-looking flat metal mounts many of them have, sometimes with ripples to straighten under load.
The other thing I forgot to mention was that a Rangie won't have nearly the amount of stuff in the back compared to something like a Troopie, so it would probably be a few hundred kilos compared to several hundred. So my barrier, which has six mounting points, is meant to be a rigid part of the body, acting as a barrier and also as a roof support. And the other thing was that I read somewhere on here about a rollover where the body flattened, the rear seats became unfastened and folded, and two children in the back were killed. Since I carry two children in the back of this ancient car, I wanted to make sure the roof was supported.
I'd love to have an engineer or three have a look at it all but they are as common as snowballs up here, unfortunately. I'm sure that having said this, several in the area will suddenly appear!
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It was the seats that stopped the roof coming completely down in my mates RRC rollover. I have just moved the wreck to store it in my shed so I might take some more pics.
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Yikes! That sounds pretty bad. Photos would be very much appreciated. It was really hard to find anything on the internet when I was designing my barrier a couple of years ago, trying to figure out what happened with these cars in a rollover.
