JARKE Steeltree Heavy-Industrial Grade Cantilever Racks let you easily store heavy lumber, tubing, and other industrial loads—up to 6000 lbs. per pair of arms without worry of sagging or collapse. Offers 2–3 times the capacity of our medium-duty racks. Rugged, steel bolted construction assures dependable service. Single and double tapered columns have patented internal stiffeners to provide additional support. Available in 8', 10', and 12' heights. 8' column made of 10-ga. steel, 10' and 12' use 10-ga. high-strength steel. Arms are fully adjustable on 3" centers. Units assemble as single rack or as a continuous assembly of two or more racks on 3-ft. or 6-ft. column centers. Made in USA.