A little background: I've got major repairs needed to the cargo floor/tailpan/tailgate hinge/rear bodymounts area on my '87 K5, and I'm thinking about a bit of a subframe under the LMC replacement sheetmetal for some reinforcement. After reviewing the tailgate hinge writeup in Tech Articles, I was thinking 2x3 tube at the tailpan area (2" side vertical), and 2x3 tube in front where the cargo floor drops down (3" side vertical), connected by 1x2 tube in an "H" with the long legs going front-to-rear to the 2x3's, and the crosspiece at the mid-floor bodymounts. The truck is gonna be more of a utility truck than a 'wheeler - my priorities have drastically changed. A sketch will be coming shortly, once I clean it up, scan, and upload it. Sooo, here's my tube questions: - In general, what are the common wall thicknesses of 1x2 and 2x3 tubing? - What's the weight-per-foot like on the various sizes? I know there's info and/or links about this in someone's posts, and I used to have a bunch bookmarked (they went bye-bye some time ago with the forum software change ), but you try searching for "tubing", "tube", "rectangular", etc. - you get a million hits, and I just don't have the time & patience to sift through them all. - Is .250 wall thickness overkill on the 2x3's in the scenario above? Seems like it to me, but that's why I'm asking... - When I call a supplier for prices, what specifically do I ask for so I don't get the "This guy's clueless so let's double the price" treatment?