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Steel to Build Taller and Longer

When we frame units in 16-gauge 1"-square tube steel (0.065" thick), we lose out on several advantages we might gain by using 18-gauge 1 1-2"-square tube steel (0.049" thick). The switch to a tube with a thinner wall but larger cross-section can decrease overall unit weight and the number of required supports while increasing weight allowances and the length of spans between supports.