Elastic provides a complete system for complex layouts, explaining every combination in detail takes many lines, and sometimes there are several solutions to accomplish the same results.
This examples only scratch the surface of the capabilities of the framework, but will put you on the right track and open your mind to play with the elastic syntax and accomplish all your needs fast. Also remember you can nest this samples to accomplish even more combinations.
* divs of class "container" are optional(check documentation)
* every fixed column can have custom width(check documentation)