Expandable Blueprint Storage Cabinet Mobile Plan Center, Assorted Document Sizes, 20.5" x 28" to 46.5" x 50.75", RedStay organized and efficient in the office with the AdirOffice Expandable Mobile Plan Center for Blueprints. For quick access, hanging blueprint storage, just clamp your files into hanging paper clamps and drop them into the top bracket. Designed for blueprints, plan drawings, maps and other large format documents. Made of heavy gauge steel with a 360 lb weight capacity, this rack can hold up to 1,800 documents at once. With its durable construction