Cantilever rack: 1.suitable for long, circle, plate or irregular shape ... double sides 3.Steel: Q235 Heavy Duty Loading Cantilever Rack is:(Fully bolted Structural I-Beam)1) Composite structure ... it can be divided into single side cantilever rack and double side cantilever rack according to the structure. Cantilever racks are great ... racks, each type of product can be segregated by commodity and size.