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

This thread's a bit old but,

You can't make an accurate comparison by looking at thickness alone. High Strength Low Alloy(HSLA) steels are becoming more and more common in the automobile industry due to weight. Most steels bought in structural shapes for general use are 'A36 Hot Rolled Steel'; the 36 means it has a minimum yield strength of ~36ksi. The HSLA stuff that's out there now has a min. yield of 80ksi or greater.