Shelves are formed from 12 gauge steel with structural angle corners and shelf reinforcements on shelves longer than 36'. Shelves are available with 1-1/2' lip, or with flush edges. Raised offset handle includes cross brace hand guard for added safety. These welded units are shipped set up and ready for immediate use, with 2 swivel and 2 rigid casters. Cushion-load casters for use over rough or uneven surfaces. Shelf clearance 18' with lipped shelves, 19-1/2' with flush shelves. Durable powder coated gray finish.