[AT] ROPS

[charliehill]

Thanks Larry,  yep that sounds like what Wayne told me.  I didn't know you 
could substitute the .118 DOM mild steel.

Charlie
----- Original Message ----- 
From: "Larry Dotson" <larrydotson at embarqmail.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Tuesday, April 06, 2010 8:04 AM
Subject: Re: [AT] ROPS


> 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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