Inliners International Forums General Discussion Tech Tips Acceptable thickness for 2X3 rectangular tubing?

I'd never use tubing less than 1/8" for a hot rod frame. Even on all the old frames I rework and box, they're 1/8" from the factory, some are cracked, some are broken all to pieces, I usually end up adding more supports to the inside also to add some strength. and like CNC said it doesn't really add any weight to the main rails, only 36 lbs.