What thickness steel should I use (1/8"? 1/4"?...gage?) to repair the frame of my car where the factory manual says I should be jacking the car up? The frame is in bad shape (rust from the inside) and I don't want to punch through it. The piece will probably be 6" long by 6" wide and have one 90 degree longatudinal bend.

Thanks. [/b]
The same thickness the factory manual recommends for such a repair...