Eia Eca-310-e Pdf -

The standard is typically available through industry standards bodies like Accuris (formerly IHS Markit) or the Electronic Components Industry Association (ECIA).

The “-E” suffix indicates the revision level. This version is the most widely adopted standard for the mechanical interface of 19-inch (482.6 mm) racks. It specifies everything from the width of mounting rails to the spacing of screw holes and the vertical increments for equipment height. Eia Eca-310-e Pdf

The minimum internal width between the rails must be 17.72 inches (450 mm) . Eia Eca-310-e Pdf