Are there bookcase units designed to roll on casters?

Mobile pedestal shelving units use heavy-duty locking casters (typically 2 in. diameter rated for 250 lbs. total) to make floor-standing storage units repositionable. These are used in mailrooms, print rooms, and collaborative office areas. Casters should be locked when the unit is loaded to prevent movement. OfficeFurniture2go.com offers mobile shelving units — call 1-800-460-0858.