Posted 1 Year, 2 Months ago LindaGarrette Expert Boarder Posts: 154   I want to advertise a racking cabinet on ebay or similar and need someone to tell me....does each vertical pair of apertures constitute 1U of space? Anyone out there need a 14U cabinet??? The administrator has disabled public write access. Posted 1 Year, 2 Months ago irishpriest Expert Boarder Posts: 149   Don't recall for certain, but if my memory serves me well 1U=1.75'. The administrator has disabled public write access.