The rack arms on a cantilever rack are typically adjustable along one-inch units for flexible storage. Rack arms can be straight and level, allowing for storage of stable options, or they can also be tapered to prevent items from rolling or sliding off of the rack arm. A lip can also be added to the end of cantilever rack arms, in order to hold items like pipes and tubing in place. When using cantilever rack arms, you should never install arms on both sides of a single-sided upright. This is highly unsafe and will result in an unstable structure.
To increase the stability of a cantilever rack system, sway braces can be installed to help support the uprights of the rack. Braces are not used to hold loads but, rather, they connect the uprights of a structure and improve the stability of a rack holding heavy items.