This 1200 Grid System is built based on the 960 Grid System by Nathan Smith. The 960 Grid System made for the web development workflow by providing a standard width of 960 pixels divided by the 12 column grid, each grid 60 pixels wide with 10 pixels gutter on each side.
The 1200 pixel grid is a contemporary approach to the traditional 960 Grid System. Monitors (mostly wide-screen) today generally support at least 1280 x 1024 pixel resolution, which the 1200 pixel grid fits perfectly in it. The 1200 pixel grid consists of 15 columns, each 60px wide with 10px gutter just like its tradition.