The Ladder Rack Straight Sections support cable on straight runs. It is made of 1-1/2 inch x 3/8 inch (38 mm x 8 mm) 16 gauge tubular steel. The nominal installed length is 10 feet (3.05 m). Each section is 9 foot 11-1/2 inches (3.03 m) long with cross members welded at 9-inch (229-mm) intervals.