What is the maximum number of flat file units that can be safely stacked?

Most manufacturers recommend stacking no more than 2-3 flat file units, with a maximum stack height of approximately 50-55 inches for stability and ergonomic access. Always use the manufacturer's stacking hardware and place the stack on a dedicated flat file base. At OfficeFurniture2go.com, we specify safe stacking configurations for every flat file order — call 1-800-460-0858.