Frames are fabricated from A36 alloy steel angles using full welds at all joints to give added strength. A combination of 2" x 2" x 3/16" and 1-3/4" x 1-3/4" x 3/16" angles are used, as required, for strength throughout each frame. Connecting "X" braces are 1-1/2" wide by 1/4" thick A36 alloy steel. For greatest protection and longest life, all parts are hot-dip galvanized after fabrication.