Medium duty cantilever racks provide a low cost storage system for storing lumber and other long, flat items with ease. Made using heavy gauge steel with gray enamel finish. Straight arms allow tool free height adjustments at 3 increments. Base can be used as bottom shelf for added storage. Includes 1 horizontal brace set (47W for 6 & 8H Units; 71W for 10H Units). Single Sided Units can be placed up against walls. Double Sided Units are great for center of aisles or rows. Starter Units include 2 uprights; Add-On Units include 1 upright. Add L Suffix for straight arms with 2H retaining lip.