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Re: Autopower roll bar tests - Summary

To: jmwagner <jmwagner@greenheart.com>
Subject: Re: Autopower roll bar tests - Summary
From: Bob Lang <LANG@isis.mit.edu>
Date: Fri, 24 Mar 2000 15:22:15 -0400 (EDT)
On Fri, 24 Mar 2000, jmwagner wrote:

> A welder at a shop I used to work out...  who has done underwater welding on 
>oil
> derricks, etc.... (trained and licensed up the kazoo!) recommended minimum 1
> 3/4", "WELDABLE" Chrome Moly 41-30 steel.

I don't mean any disrespect to your welder friend...

Please pay attention to the rules bodies with respect to the material in 
the cage. Currently the GCR reccommends various size pipe depending on 
the weight of the car, but there's also cautions about the welding 
process. I'm most certainly not an expert welder, but I recall the 
wording to be something like "chrome moly tubing is not recommended as 
the welds must be stabilized" or something to that effect.

Bottom line - they suggest DOM tubing.

regards,
rml
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