Many types of heavy duty industrial storage systems incorporate layout and design elements that are geared toward increasing a warehouse's storage density. Layout and design complexity over the past decades have incorporated many innovations in metal shelving unit and rack styles. Most roll form and structural rack installations now incorporate rack supported wire mesh decking. Wire decks are a highly desirable shelving unit Ironton 4-Tier Industrial Shelving Rack 77in.W x 24in.D Product Summary The Ironton® 4-Tier Industrial Shelving Rack is made of steel to provide heavy-duty storage space. 4-shelf rack features 77in.W x 24in.D shelves that can hold 2000 lbs. each. Mesh deck allows air circulation around contents.