What are some alternative uses for DOM, and how can it be identified?
I pulled some tubing off a renovation at a military base a few years ago, and I can't see anything that separates it from DOM.
What are some alternative uses for DOM, and how can it be identified?
I pulled some tubing off a renovation at a military base a few years ago, and I can't see anything that separates it from DOM.
You may need some bigger stuff. NHRA legal cage is at least 1 5/8" or 1 3/4" for a roll bar. The support stuff I use is smaller. See starting at section: 4:10 ROLL BAR
An idea is to stop by a race car or chassis shop. They often cut out old rollcages to update cars to new specs. They may give you the pieces you need. I made 1 fit in the old days. It was a pain and I would not do it again.
Another idea:
RACE CAR CHASSIS / ROLL CAGE - $350 (MONROE)
I am familiar with the NHRA regs, and understand the differences.
Yes, I may need bigger, but I have design considerations that may trump NHRA.
Primarily, I am focused on SCCA cages for this project.
Right now, size doesn't matter. Inexpensive sources, and identifying used materials matter.
You're going to have a HELL of a time identifying used materials if it matters to you. A tech inspector is going to as well, as they only check that it's X diameter, Y wall thickness, has or does not have a weld seam, and is or is not magnetic. So when it comes to used materials meeting the requirements, there are totally different focuses...passing tech, or being safe. When it comes to being safe, the only real way to do it is to buy new from reputable suppliers. If you wanted to be really safe, you can even get tested and certified stuff, but that's certainly not typical for race cars.
I suggest you just build a really small car, use DOM only where it is required, and buy new to keep cost/weight down for the cage. Worked for me. 
Bryce
In reply to Nashco:
OK, so I AM building a really small car.
What have you learned about where DOM is and is not required? (Last I recall, you were thinking all tubing and braces had to be DOM, but only the roll bar had to be a particular size/ thickness. Did you confirm this?)
Why does buying new keep down the cost and weight?? 
You'll need to log in to post.
