The distance between the outside face of the front mounting post and the outside face of the back mounting post should be 26 to 32 in. (66 to 81 cm) to allow for rear-bracket installation. Our standards require 48 inches of clearance in the front of the cabinet (how can I insert a 48 inch deep piece of equipment without 48 inches of clear space???). We also require 24 inches of clear space. For four-post EIA racks, this measurement is the distance between the two front rails. As the definition states, a server rack is a multi-level furniture piece designed to accommodate telecommunication equipment, cross-countries, and termination points for transmission. How far back should I set the back rail from the front rail? Based on looking at rail from an old R610, I was thinking 28 or 29 inches? Rack will hold all kinds of hardware. Are you trying to use 2 - 2 post racks in a 4-post configuration? Not all 4 post racks are the same depth, and some are.
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