title: Twitter bootstrap: Why .row or .row-fluid does not have height?
body: <p>I'm new to Twitter bootstrap framework, but been in web dev for a year. Just wondering why the .row or .row-fluid does not have height at all?</p>
  
  <p>I've been using padding: for the container to make the height so my background image is visible. And I've found I have to do this all the time!!! What is the purposed way to solve this issue? Most of my div elements have no content but different background image. Thanks.</p>