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Hmm...I think we use 1"x1.5" aluminum rectangular tubing. Not too sure on the dimensions. It's sturdy. Uhh...and it's sturdy.
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I'm a professional web developer. I'm good with PHP, Perl, Java/JSP, some RoR, XML, Javascript (AJAX as well), (x)HTML, CSS, etc.. Validated code is good; fully cross-browser code is better (you comply to your users and the software they use, not the other way around. Sorry!)
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