Designed and Built to Exceed Your Needs. The Open Frame Server Rack is designed to provide users with a customizable solution engineered to meet a diverse set of rack mounting needs. This EIA server rack uses universal square holes and is compatible with 19” equipment developed by the leading OEMs. The Open Frame Rack is perfect for both small offices and large data centers as it is available in sizes from 5U to 70U and depths of 20”, 24”, and 28” making this the ideal mount racking solution.