seat mounting rules

[mtownneon]

Seat and belt mounting should never ber attached directly to the tub of a prduction based car. It should always be attached to the cage structure.

The problem of the "third" mounting point discussed is it creates a place where the seat mount can bind an not allow the seat mount to move with the cage, especially the main hoop and the door bars. In the current SCCA cage rules you are allowed as many "touches" as you like so if you want you could put a foot on the seat mount at the right front corner but I'd only tack it to the mount and just let it rest on the floor pan.

Here's a couple of pics of how I do the seat mounts in production based road race and circle track cars. The pics don't include the belt mounting tabs, I don't add those on the seat mount tubes until I have the seat mounted and the driver in place to insure belt angle to avoid dumping.

[Andy Bettencourt]

Excellent examples IMHO of how to do this without additional mounting points or a change in the rules.

[quadzjr]

those are nice setups..

for an effective seat bars, yo uwould have to build something similiar to the brackets above, then weld them to teh chassis. Jsut adding bars goign from teh lower door bars to the tunnel would do very little to nothing, if the assumption is that the floor pan is weak, the bars would be loaded in single shear.

I am not against the idea.. just if this does. please do it right.

but then again you can also argue seam welding for saftey, and cage bars to chassis welding.. for saftey..

[spnkzss]

And there is nothing stopping you from bending another tube that runs tight against the floor and attaches under the dash to a knee bar.

[Andy Bettencourt]

You could also give that structure 'feet'. So long as they are not welded to the floor, you wouldn't have the extra attachment points and your seat would move with the cage as the safety contingent desires.

[seckerich]

Seat and belt mounting should never ber attached directly to the tub of a prduction based car. It should always be attached to the cage structure.

The problem of the "third" mounting point discussed is it creates a place where the seat mount can bind an not allow the seat mount to move with the cage, especially the main hoop and the door bars. In the current SCCA cage rules you are allowed as many "touches" as you like so if you want you could put a foot on the seat mount at the right front corner but I'd only tack it to the mount and just let it rest on the floor pan.

Here's a couple of pics of how I do the seat mounts in production based road race and circle track cars. The pics don't include the belt mounting tabs, I don't add those on the seat mount tubes until I have the seat mounted and the driver in place to insure belt angle to avoid dumping.

Very nice fabrication of a very dangerous cage design. The car will be in the drivers lap in an A pillar hit. Going a little to far to help driver exit. Unless there is something higher not shown in the pictures that is no better than one door bar.

[dickita15]

Guys, as usual you do not disappoint, this has been a good discussion. I am going to send the letter into the CRB but I am going to reference this thread because I think you guys vetted it very well.

[lateapex911]

I think there are a number of methods of buildign a seat mount that attaches to the cage, and doesn't attach to the car, meeting the rules as written, AND providing the safety desired.