The proper weight for a cat can vary widely, depending on the cat's build. My four normal-weight cats range from 6.5 pounds up to 14 pounds. Some large-breed cats such as Maine Coons can weigh 24 pounds and be normal, though most domestic cats would be obese at that weight. http://www.cvm.tamu.edu/clinicalnutritio...
A Rack Unit or Rack U is an EIA standard allowance unit for measuring rack mount equipment. One Rack Unit is equal to 1.75 in height. To calculate internal useable space of a rack enclosure, simply multiply the total amount of Rack Units by 1.75. For example, a44U rack enclosure would have 77 of internal usable space (44 x 1.75). Click here to choose racks by height.
It can also describe a unit that is 1U high and half the depth of a 4-post rack (such as a network switch, router, KVM switch, or server), such that two units can be mounted in 1U of space (one mounted at the front of the rack and one at the rear).