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.
U is the standard unit of measure for designating the vertical usable space, or height of racks (metal frame designed to hold hardware devices) and cabinets (enclosures with one or more doors). This unit of measurement refers to the space between shelves on a rack. 1U is equal to 1.75 inches. For example, a rack designated as 20U, has 20 rack spaces for equipment and has 35 (20 x 1.75.) inches of vertical usable space. Rack and cabinet spaces and the equipment which fit into them are all measured in U.