author=old chevy truck link=topic=10147.msg166662#msg166662 date=1312950480]
The original question from richie asked if square tubing could be used to construct a roll cage.
In fact section 3.B.1, in the first sentence requires the use of ".... 1 5/8" O.D. round steel tubing..." for all roll cages class down to the F class. Starting with the G class and below the requirement is "...round steel tubing not less than 1-1/2 in. O.D..."
Bub rules state , 1 1/4" x .090 does not specify round or sqaure... highlights no aluminumn hardware as part of the belt system,but does state this Builders of any frame other than those constructed of steel shall submit frame structure information to the promoters that document the durability of the structure. When requested, provide test certifications on components and stress examination as required.?
Section 3.B.1 is addressing a car not a motorcycle. My old rulebook(2009) so it may have changed does mention in 7.H.4 "flat roll cage".
Best to shoot some pictures by the appropriate SCTA or sanctioning body of choice not the interwebby place.