Go Back  RX7Club.com - Mazda RX7 Forum > Tech and Performance > Race Car Tech
Reload this Page >

Do most sanctioning bodies allow square steel tubing?

Race Car Tech Discuss anything related to road racing and auto X.

Do most sanctioning bodies allow square steel tubing?

Old 12-19-07, 08:28 AM
  #1  
Resurrecting Gus
10 Year Member
Thread Starter
iTrader: (4)
 
Glazedham42's Avatar
 
Join Date: Jul 2003
Location: Indiana
Posts: 2,790
Likes: 0
Received 2 Likes on 2 Posts
Do most sanctioning bodies allow square steel tubing?

I'm not extremely familiar with the rules from the different racing sanctioning bodies, so please forgive me. Can some of you more knowledgeable guys tell me if there are any rules/requirements towards square steel tubing? I am thinking of using some 3/4"x3/4" or 1"x1" to make a strut bar for my 83 GS, as I can't find ANYONE near me who stocks round steel tubing. I have plans in the future to possibly get into some local SCCA events, and wondered if I would be wasting my time making it out of square? Is it allowed under the rules?
Glazedham42 is offline  
Old 12-19-07, 08:59 AM
  #2  
Rotary Enthusiast
iTrader: (3)
 
mustanghammer's Avatar
 
Join Date: Nov 2006
Location: Parkville, Mo
Posts: 1,102
Likes: 0
Received 21 Likes on 17 Posts
Originally Posted by Glazedham42 View Post
I'm not extremely familiar with the rules from the different racing sanctioning bodies, so please forgive me. Can some of you more knowledgeable guys tell me if there are any rules/requirements towards square steel tubing? I am thinking of using some 3/4"x3/4" or 1"x1" to make a strut bar for my 83 GS, as I can't find ANYONE near me who stocks round steel tubing. I have plans in the future to possibly get into some local SCCA events, and wondered if I would be wasting my time making it out of square? Is it allowed under the rules?
There should be no issue with this. I have seen many Solo II and GT road race cars that incorporate square tubing in their structure. It is stiffer than round tubing and easy to fabricate with.

The best way to answer questions like these is to go to www.scca.com and go to the Solo section and down load the latest rule book. It is FREE.
mustanghammer is offline  
Old 12-19-07, 09:04 AM
  #3  
Old Rotary Dog
10 Year Member
 
wrankin's Avatar
 
Join Date: Feb 2003
Location: Durham, NC
Posts: 1,461
Likes: 0
Received 2 Likes on 2 Posts
Check the GCR. I assume that when you say "SCCA Events" then you are referring to Auto-X types of events? As far as I know, the design and materials for things like strut-bars are fairly open. When you start building cages and roll-bars is when you begin to see restrictions on materials and sizes (DOM tubing only, minimum diameter and thickness, etc.).

-bill
wrankin is offline  
Old 12-19-07, 09:07 AM
  #4  
Resurrecting Gus
10 Year Member
Thread Starter
iTrader: (4)
 
Glazedham42's Avatar
 
Join Date: Jul 2003
Location: Indiana
Posts: 2,790
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by mustanghammer View Post
The best way to answer questions like these is to go to www.scca.com and go to the Solo section and down load the latest rule book. It is FREE.
Awesome, I will try that. Thanks for the info. It sounds like the square steel strut bar design should be okay then, and be stiffer than round as well. Granted the square steel tubing tends to be a little bit heavier, but since I am only using a 4 foot piece, that will only account to about a 1 pound difference between the two design options. Just wanted to make sure that there isn't some unspoken rule that you don't use square steel tubing for applications such as this one.
Glazedham42 is offline  
Old 12-19-07, 09:07 AM
  #5  
Banned. I got OWNED!!!
iTrader: (3)
 
Join Date: Nov 2001
Location: London, Ontario
Posts: 2,483
Likes: 0
Received 0 Likes on 0 Posts
No problem, This would be the same type of thing as a fuel cell mounting structure. These type of structures are up to the racer and not governed by the rules as far as materials.

Hoosier State? Are you in Indiana? Try these guys:

http://www.aedmotorsports.com/


Here are a few places you could see if they have a local supplier:

http://www.metalsupermarkets.com/
http://www.mcmaster.com


-billy
Re-Speed.com is offline  
Old 12-19-07, 09:35 AM
  #6  
Old Rotary Dog
10 Year Member
 
wrankin's Avatar
 
Join Date: Feb 2003
Location: Durham, NC
Posts: 1,461
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by bwaits View Post
No problem, This would be the same type of thing as a fuel cell mounting structure. These type of structures are up to the racer and not governed by the rules as far as materials.
Yes, but it does have to pass technical scrutiny for safety, so it needs to be securely mounted with the correct hardware (eg. mounting a drivers seat using wood screws and 2x4s as a base will not fly).

So when in doubt, check with your local safety steward.

-bill
wrankin is offline  
Old 12-19-07, 02:50 PM
  #7  
Lives on the Forum
10 Year Member
 
Black91n/a's Avatar
 
Join Date: Sep 2003
Location: BC, Canada
Posts: 5,707
Likes: 0
Received 1 Like on 1 Post
Pound for pound round is better.
Black91n/a is offline  
Old 12-19-07, 06:49 PM
  #8  
needs more track time
iTrader: (14)
 
gracer7-rx7's Avatar
 
Join Date: Mar 2006
Location: Bay Area CA
Posts: 7,833
Received 14 Likes on 13 Posts
Interesting. Check out the chassis of a Spec Racer Ford
http://cgi.ebay.com/ebaymotors/Spec-...QQcmdZViewItem
gracer7-rx7 is offline  
Old 12-20-07, 10:05 AM
  #9  
Old Rotary Dog
10 Year Member
 
wrankin's Avatar
 
Join Date: Feb 2003
Location: Durham, NC
Posts: 1,461
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by gracer7-rx7 View Post
Interesting. Check out the chassis of a Spec Racer Ford
Yup - square tubing. Round is (in general) stronger, but square is much easier to build with and weld (again, in general). For things like a space frame chassis, square is fine.

-bill
wrankin is offline  
Old 12-20-07, 10:27 AM
  #10  
Rotary Enthusiast
iTrader: (3)
 
mustanghammer's Avatar
 
Join Date: Nov 2006
Location: Parkville, Mo
Posts: 1,102
Likes: 0
Received 21 Likes on 17 Posts
Originally Posted by gracer7-rx7 View Post
Interesting. Check out the chassis of a Spec Racer Ford
http://cgi.ebay.com/ebaymotors/Spec-...QQcmdZViewItem
Or the chassis on almost any current GT1/Trans AM car. They are all square/rectangular tube below the belt line. Only the safety cage is round tube on these cars.
mustanghammer is offline  
Old 12-20-07, 10:57 AM
  #11  
Banned. I got OWNED!!!
iTrader: (3)
 
Join Date: Nov 2001
Location: London, Ontario
Posts: 2,483
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by mustanghammer View Post
Or the chassis on almost any current GT1/Trans AM car. They are all square/rectangular tube below the belt line. Only the safety cage is round tube on these cars.

along with every tube constructed chassis we have in the shop.


-billy
Re-Speed.com is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM
armans
Single Turbo RX-7's
1
09-06-15 09:02 PM


Thread Tools
Search this Thread
Quick Reply: Do most sanctioning bodies allow square steel tubing?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: