How are roll-bars typically made/purchased?

[haygood at aemail4u.com (Haygood)]

I'm a mech. engr. (unemployed) with some experience designing tube frames for race cars, analyzing them, etc.  Give me a call after 8:00 central, or on weekends and we'll talk.  412-606-2535.  That's open to anyone who wants to discuss any of this stuff.

BH

--- Jeff Toomasson <jtoomasson@yahoo.com> wrote:
>I guess maybe I shouldn't call it "simple", but I was looking for something that would cinch the four strut towers in such a way to keep chassis flexion to a minimum. Any suggestions on a pattern?  :)
> 
>Going custom is not an obstacle - I'll need my rag to tackle the twisties 5-10 times a year. And I don't want have the roof cracking if I'm going to drop $$$$ on a paint job...  :)
>
>L F <rocco16v@netzero.net> wrote:
>Jeff,
>A simple four-point roll bar will not stiffen the chassis to any significant degree. 
>As far as minimum gage, this would apply only if you are building to a particular race sanctioning body's rule book. if you aren't racing, don't worry about it. I wouldn't go under .062" wall thickness, .080" would be better/heavier/more costly. 
>I'd have one custom built, if it were me.
>And I'd have a good welder install it. (although with a hardtop, you could get away with bolting and bolting WOULD let you remove it more easily)
>Mostly personal opinions here, but I've built race cages before. 
>----- Original Message ----- 
>From: Jeff Toomasson 
>To: scirocco-l@scirocco.org 
>Sent: Friday, July 11, 2003 1:08 PM
>Subject: How are roll-bars typically made/purchased?
>
>
>Most likely I'm going to have to have a simple roll-bar setup when I do my ragtop to prevent undue stress to the roof from chassis flexion.
>
>Honnold mentioned that he got a "Autopower" setup, but I don't get anything when search for that in Yahoo. Went to the .org for various links to racing sites and got nothing (BSI, Shine...). I don't see any at some of the tuners' sites I've checked either...
>
>Are they typically custom-made? Is there a minimum tubing gauge that must be observed? I'm assuming it's better to have them bolted in as opposed to welded...
>
>Also, should I have it installed when I have the car painted? Or do it after?
>
>Thanks in advance! Jeff
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