[ledfoot2]

I talked to them and they have a 10 point DOM cage that would be NASA legal for 499 plus 160 for shipping. It is not complete. IT does not have petty bars for the door or some smaller bracing that I would add, but everything is notched and ready to go.

Any thoughts?

[GlennCMC70]

they are called inspection holes for a reason. they insert a length of stiff wire or rod and look/feel for the seam on the inside.

[StanIROCZ]

they are called inspection holes for a reason. they insert a length of stiff wire or rod and look/feel for the seam on the inside.

But like I was saying, some of the ERW that I've seen doesn't have a visible seam from the inside or outside. The weld gets scuffed off and you can't see or feel anything but a black line. If thats the case no one would ever know.

This post has been edited by StanIROCZ: May 2 2008, 08:51 PM

[Blainefab]

they are called inspection holes for a reason. they insert a length of stiff wire or rod and look/feel for the seam on the inside.

But like I was saying, some of the ERW that I've seen doesn't have a visible seam from the inside or outside. The weld gets scuffed off and you can't see or feel anything but a black line. If thats the case no one would ever know.

Ya, you could try to get your supplier to select tubing that doesn't have a ridge on the inside, and buff it smooth on the outside, and still get nailed by an ultrasonic thickness tester that exposes the inconsistent wall thickness that is characteristic of ERW.

So maybe you get by the tech inspector, race the car for a while and then sell it. Buyer wrecks, gets hurt, and the cage is cut to get him out. Cage is revealed as illegal material, what is your liability exposure?

Or, just build it with DOM like the rules require.