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.
The type of rack you need will be determined by how many cans you need to hold. Full-size units stand around 6 feet high and are able to hold between 200 - 300 No. 5 cans. Half-size units stand 3-4 feet tall and typically hold fewer than 100 No. 5 cans. Not all can racks will hold all can sizes.