Re: Cage tubing question
Plate thickness...This is from NASA rule book: 15.6.14 Each mounting plate shall be no greater than one hundred spuare inches and no greater than twelve inches or less than two inches on a side.Welded mounting plates shall be at least 0.080 inch thick. Each mounting plate should have an area of not less than nine square inches.
Also...15.6.14.A Mounting plates-Bolt-in cage..The attaching points of a bolt-in cage to the body must use reinforcing plates to sandwich the body. At least three bolts are required for each bolt-in plate and the plate must be at least 3/16 inch thick. All hardware must be SAE grade 5 or better with 5/16 diameter minimum. All nuts must be held securely by a locking system such as safety wire, lock washer, ny-lox, or jam-nuts.
I think these guidelines will pass Lemons tech.