Re[2]: ERW vs DOM - was: Good Milano stuff on ebay

[Richard Welty <rwelty@domain.elided>]

On Mon, 3 Mar 2003 19:53:45 -0800 Jorge & Ani Mazlumian <jorge.ana@domain.elided> wrote:

> Richard asks Chip:
> "just as a service for the readership, could you please let the members
> of
> the digest know if the tubing is ERW or DOM, and what dimensions it is?"
> *********************************
> I bought my Autopower rollbar in a used/excellent condition.  How do I
> know
> if it's ERW or DOM?

as both russ and i pointed out, there's a very obvious seam in ERW tubing.
if the cage is not installed, you can look in the tubes and see it. if it
is installed, normally the SCCA requires 3/16" inspection holes at selected
places on a cage. normally you'd have one in the main hoop. for a roll bar
(as opposed to a cage), one in the main hoop would probably be sufficient.
inspection holes should be in the passenger side, in a straight section of
the cage, away from bends and from welds.

once you have an inspection hole, you can use a pick or a piece of wire
bent into a hook to sweep the inside feeling for the seam.

richard
--
Richard Welty                                         rwelty@domain.elided
Averill Park Networking                                         518-573-7592
              Unix, Linux, IP Network Engineering, Security
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