Eia Eca-310-e Pdf Here

All rack-mount equipment heights are multiples of this unit (e.g., 2U, 4U). Holes are grouped in 1.75-inch cycles.

Vertical hole spacing is defined as a repeating pattern of holes within one Rack Unit of 1.75”. The whole spacing alternates at 1/ RackSolutions Rack specifications - IBM Eia Eca-310-e Pdf

Without this standard, hardware from different companies like IBM, Dell, Cisco, and HP would not fit into the same metal cabinets. RackSolutions 📏 What the Standard Dictates All rack-mount equipment heights are multiples of this