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tube door tech (Safety)

rdn2blazer

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What do you think about this?

One thing I think should be considered with tube doors regarding a safety issue is whether they could possibly cave, or fold in and hurt the passengers in a hard roll of flop. A factory sheet metal door won't cave in past the seal area, It would only dent badly, that type of cave in. It has alot of surface area surounding the door. Where it meets the front fender, where it latches, and at the bottom of the door. The door has alot of "overhang" from the seal area and past. A tube door ONLY mounts at the hinges and the door pin.

The pinch weld where the door jamp and inner body panel meet is not strong enough at all to keep it a tube door from smashing past it and hitting the driver or passenger. On a hard enough flop onto a big rock or tree stump the hinghes would just bend if the door smashed thru the pinch weld. In my cage I added this tube (see pics) to just give a bit more protection. Didn't think much past that. When I started thinking about buying tube doors I though about how they mount and thought about a flop onto a big rock and what might happen.

This added tube on my cage would more then likely prevent a door from ripping the pin out of the sheet metal, (I highly doubt it would sheer the pin), and smash thru the pinch weld and into the pasenger compartment possibly causing injury or worse. I'm not saying tube doors are dangerous by any means. I just bought a set, but if this is a possibility it should be something to consider.

If your building a cage, possibly add some tube in the door area that would block the door from folding inboard. Sure the door would hit the seat aswell but still might make contact with the person.

What's your openion? A legitimate concern or not?

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that looks like a huge safety plus. Thats you cage? You build it? Looks very nice. I need one in mine at somepoint when funds allow.
 
that looks like a huge safety plus. Thats you cage? You build it? Looks very nice. I need one in mine at somepoint when funds allow.


Thanks. Yes thats my cage I built. There not cheap to build for damn sure. $2500 for a good cage from a shop is actually not unreasonable. Considering the equipment you have to buy, and tube cost and labor I have WAY more then that into mine I bet.
 
I used to work in a shop that built Porsche Cup cars. I use to do the mechanical, not the fab, but that cage of yours looks mighty impressive. I'm going to take some welding classes after work at the college. I figured I would buy one of those prefab kits from that chassis shop that makes them. Can't remember the name though.
 
Rob
That is one fine looking cage! Got more pics in another thread somewhere?

Disregard! I just found your other thread. keep at it!
 
To stay on topic...
You may never need that additional bar. But, if it wasn't there, by the time you wish it was, it would be too late.

Did that make sense? Bottom line is the safer you can make it, the better off you'll be in the end.

Nice cage BTW. Did you widen the rear wheel tubs too?
 
To stay on topic...
You may never need that additional bar. But, if it wasn't there, by the time you wish it was, it would be too late.

Did that make sense? Bottom line is the safer you can make it, the better off you'll be in the end.

Nice cage BTW. Did you widen the rear wheel tubs too?


I agree, and Yes I did.
 
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