Because of the length of some newer tape libraries and rackmount servers, we have migrated from 42 in. to 48 in. deep racks. You should plan on 48 in. access for the front of the racks and 36 in. rear access. This gives racks an 11 ft. footprint. Maybe others can chime in on average rack power, but we have one facility using subfloor cooling that averages around 6 kW per rack and another using hot aisle containment that can accommodate 20 kW per rack.
Ken
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DR/BC Planner
Last edited by KenB; 11-17-2011 at 08:45 PM.
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