Inquiry (采购产品): steel Tubing I am building a prototype vehicle and wish to change the chassis configeration. The veicle is powered by an engine that consumes compressed Air. I wish to eliminate the commercial round cylinders as they make the chassis heavey and cumbersom. I wish to incorporate two retangle square tubes approximately 3" by 6" by 15 feet as the frame rails made from steel that I can dual as the High pressure compressed Air (3,000 P.S.I.) reserve tanks. What steel do you recommend I try and what guage do you recommend to handle the rail strength as well as maintain 3 to 5,000 P.S.I.be able to function **** Hidden Message ***** L B Wilkes 14 Burkle Lake Lane Eldon, MO 65026 USA Company: L B plus 3, LLC Title: Prototype V.P. Phone: 573-268-6853 E-mail: lbplus3@sbcglobal.net **** Hidden Message ***** lbplus3@sbcglobal.net