[AT] ROPS

[Larry Dotson]

Charlie
They use 4130 Chromoly at .083 minimum wall thickness at 1 5/8 diameter for 
the main hoop or DOM mild steel at .118 minimum wall thickness and 2 inch 
diameter.
I used the Chromoly for mine.

Larry Dotson

----- Original Message ----- 
From: "charliehill" <charliehill at embarqmail.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Monday, April 05, 2010 10:24 PM
Subject: Re: [AT] ROPS


>A drag racing buddy of mine told me race cars are supposed to use seamless
> chrome molly tubing for their roll cages and there is a minimum wall
> thickness but I can't tell you off hand what it is.  I don't know if 
> NASCAR,
> NHRA and the others all use the same specs or not.
>
>
> ----- Original Message ----- 
> From: "Steve W." <falcon at telenet.net>
> To: "Antique tractor email discussion group" 
> <at at lists.antique-tractor.com>
> Sent: Monday, April 05, 2010 9:58 PM
> Subject: Re: [AT] ROPS
>
>
>> charliehill wrote:
>>> If you are going to build your own roll bar and plan to have any hired
>>> help
>>> you better NOT call it a ROPS.  Put a canopy on it and call it a strong
>>> sun
>>> shade or something but DON'T call it a ROPS if you want to still own 
>>> your
>>> land when the lawyers finish with you.  It might even be a good idea to
>>> put
>>> a sign on it that says this IS NOT  A ROPS.  You can't legally build a
>>> ROPS
>>> or even modify the one that came from the factory without submitting it
>>> to
>>> the testing labs for approval.
>>>
>>> I'm not saying don't build one.  Just be careful what you call it.
>>>
>>>
>>> Charlie
>>
>> True for tractor ROPS. Go visit your local dirt track if you want to see
>> some interesting "homemade" roll cages. One of the neighbor kids is
>> starting out this year and picked up a car that is supposed to be ready
>> to go.
>>
>> -- 
>> Steve W.
>> (\___/)
>> (='.'=)
>> (")_(")
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