what roll cage tubing type

Old 03-23-2013, 01:25 PM
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Join Date: Apr 2003
Posts: 17
Default Re: what roll cage tubing type

Originally Posted by laxking012
Was looking at cages on S&W website for my 1991 s10, there's EWS and DOM mild steel. I've always heard DOM is stronger and better, but on website it says "Do not recommend DOM tubing for drag racing applications". Why is that and should I just get the EWS?
I built racecar chassis for several years & always used .120 DOM when I had a choice & never had a chassis fail certification. The DOM is much more consistent than the cheaper stuff. Actually the reason for using .134 is it is more inconsistent & is also much heavier. I would recommend talking with the NHRA Chassis inspector beforehand as there are variations from person to person in how they approach Certification.

There is undoubtedly a good reason for the disclaimer from S&W but unless something drastic has changed the DOM is better tubing. Your bender can also affect the thickness of the outside radius.
MoonshadowRacing is offline  
Old 09-02-2013, 04:11 PM
Join Date: Dec 2008
Location: jacksonville florida
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Default tubing

the issue is at bends the inner thickens and outer stretches hence reducing the wall thickness, get the SFI guide and build chassis to those specs, they are different to NHRA (thinner wall)
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Old 01-26-2014, 04:45 AM
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Yes, your posting is older, but we thought we would chime in just in case you haven't made your final decision.

This is ‘your’ life, so listen to those who know, and don't talk price, which is in this discussion, as that is not what this is all about.

We used DOM in this rollcage for our '99 Firebird, as it is recommended by most tech inspectors over Chrome Moly. Why? Most Chrome Moly cages will not pass an inspection without a pile of paperwork and certifications that most can't afford. Everyone here has heard of or seen cage failures because the welding process was Junk!

Our cage has 223' of DOM tubing. BUT, we went to the next safety item. Welding the main hoops to ¼” plates welded to the floor just doesn't cut it anymore, and you will see inspections that demand an Occupant Compartment Frame (OCF), which is what you see here.

For our design, we used a Nascar Spec. design, similar to our current Land Speed Race car.

Just our .02 cents, and hope this helps in your decisions.

The Maxx2Racing (M2) Team
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The Royal Purple Maxx2Racing ‘Bad Bird’ LSR Race Car
The Royal Purple ’99 Firebird Pro Touring-LSR Car
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Old 02-13-2014, 07:30 PM
Join Date: Dec 2008
Location: jacksonville florida
Posts: 34

my opinion, dom is better more consistent.
get an SFI 25.x to match your needs.
nhra requirements are thicker than SFI. .134 wall is used because of stretch on bends.
dartsteve is offline  
Old 03-22-2014, 04:39 PM
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I use .125 wall EW. never failed a 7.50 tag. can buy any steel supply
rhcustomwelding is offline  
Old 07-30-2014, 11:40 AM
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Join Date: Mar 2014
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Following your mail. If you have to keep your weight down, before I built the cage, I would sonic test the tubing ahead of time...
gasserted is offline  
Old 01-06-2023, 06:42 AM
Join Date: Feb 2022
Posts: 37

the EWS is made from flat plate and electrically butt welded 1010 mat'l, the DOM is 1020 mat'l and cld draw over a mandrel and seemless, the carbon content is in the same range on both.

Last edited by murrayjest; 01-09-2023 at 07:11 AM.
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