Cantilever Rack Cantilever racks racking system is a kind of heavy duty racks that mostly used to store long and bulky goods, such as lumbers, pipes, steel tubes and more. A cantilever racking system consists of an upright column and base, arms with vertical and horizontal braces. It can store light duty, medium duty and heavy duty goods. It can be configured for Single side and Double sides racks. Specification of cantilever racking system? 1) Capacity: 10,000 lbs (Single Sided), 10,000 lbs per side (Double Sided) 2) Column size: 4" wide x 12" deep. 3) Single-sided base: http://www.di-aorack.com/cantilever-rack/