I am wondering who came up with the seat back brace idea and why?

after re- installing a brace back into my car due to an older FIA seat , I noticed that the main support for my seat is infact not in the center of the seat back, but rather on the sides.

This now brings up a great question of a support bracket Ramming through my seat and into my spine in an accident.

only way to prevert this is a HUGE , heavy plate which may spread the blow to the sides of the seat.
The bracket would have to reach to the outer edges of the seat which would be about 16" across.

I think I would rather have the seat break !!! then be pounded in the spine.

To TECH : Yes I have installed the required seat back brace but NO! I am not happy about it.

:-X

Try a different design; you can use a simple strip of steel (1.5X.125) attached to the seat and run vertically to the roll bar.
I did this a couple of years ago and it was accepted by tech.
The rule doesn't specify how you attach the seat they just don't want it shearing off the mounts and rolling around inside the car! :)

The vertical piece of steel also prevents the top of the seat bending backwards like JP Skinners did a few years ago ;).

I've got an "expired" FIA seat that will need a back brace this year as well. I like the vertical strap to the roll bar idea MUCH better than the "stick to the spine" setup that Dood has described.

Anyone from Tech able to speak to this? I'm sure others may be interested in this interpretation.

Richard

It's not that anyone is attempting to avoid answering your questions, in case you are thinking that. It's more that it's difficult to fomulate an intelligent response when we have to consider the number of avriables that might be involved.

First I would suggest that you read the pertinent regulations in all three sanctioning bodies rulebooks. That's CACC, SCCA and Conference. That will give you a (hopefully) clear understanding of what the requirements are.

Then I would suggest that you consider carefully ALL the other little variables that might be involved. For instance, do you want to be able to move the seat to accomodate different sized drivers. This might be important if you are renting your car to someone. We have some suggestions on that front, if you're interested.

I'd also point out that mounting may be different for different cars.  

I realise that this is a bit of a non-answer, but I'd say there are lots of possible solutions to the question.

Mike

The CACC and SCCA rules seem to have the same requirement. If the seat does not meet the FIA requirements, then the seat back must be attached to the roll bar or its braces. I suggest that everybody consider having a FIA seat. Failing that, the idea that the brace could punch into the spine says that one needs to be a little more creative in the design of the brace. A mounting plate as large as possible attached to the seat back and then an attachment to the roll bar would meet the rules, probably remove the spine punching problem and could be designed to be adjustable for different drivers.

I find that this rule has left the door open to make anything we see fit,  No direction on material, mounting hardware , or size of the plate  

So i guess my cardboard seat back brace can be duct taped to the roll cage  ;D


JUST KIDDING!

I will make it from wood  ::)

If you read the whole rule you will find that the word firmly is in it.

Hey 'Ego Boy' try seeking advice from some more experienced drivers, I'm sure there must be one or two that would be willing to help you ;).
'The Old Man' ;D

Keith Robinson wrote on Feb 6^th, 2013 at 11:19am:

Hey 'Ego Boy' try seeking advice from some more experienced drivers, I'm sure there must be one or two that would be willing to help you ;). 'The Old Man' ;D

"OLD MAN"  When you say Experienced? do you mean a slow senior such as yourself? once again I am confused with your poor ENGLISH.  ::)

I had a seat back brace come through my seat
in a rear hit collision back in my karting days. I got lucky with only broken ribs. I came out of the seat as well cause no belts. If I was strapped in could've been much worse.  :(
The strip across the back would help with that for sure.

Since Ryan has talked me out of replacing the current seat in my car (at least for now) with a new FIA seat I am going to remount the current seat a bit differently, but want to be sure it will still be acceptable next year. I also do not like the idea of putting something in the back of the seat that could potentially injure a driver, Keith's idea appeals to me.

Mike Kaerne had mentioned a couple of meetings ago about the rules stipulating more clearly how the seat brace be done, but I can't remember if the change was for this year or next. This is the current wording:
In cars where the seat is upright (most common in GT and IP/IT cars) the back of the seat shall be firmly attached to the main roll hoop, or its cross bracing, so as to provide aft and lateral support. Bulkheads, firewalls, rear decks, or similar structures of suitable strength may be used as a substitute for the main roll hoop or cross bracing to provide the required seat back support.

If there will be new wording, where would I find that?

Wow.. thanks for bringing this to light. My car came with one.

I am getting a new drivers seat and tossing the back brace ASAP