What is the difference between a flat-file cabinet and a blueprint rack?

A blueprint rack (or clamp rack) stores drawings by hanging them on spring-tension clamps suspended from a horizontal bar — drawings hang vertically and can be flipped through like a book. Flat-file cabinets store drawings horizontally in drawers. Blueprint racks are better for very active reference drawings that are consulted multiple times daily; flat files are better for organized archival storage. Many firms use both: active drawings on a rack, completed projects in a flat file. OfficeFurniture2go.com — call 1-800-460-0858.