SO Grid

This is a simple Bootstrap skeleton. You can fork it to get a ready to use Bootstrap fiddle.

by panchroma

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.1.0/bootstrap.min.js"></script>
<div class="container-fluid">
    
  <div class="row-fluid">
  <div class="span6">1</div>
  <div class="span6">2</div>
    </div> <!-- end row -->
      <div class="row-fluid">
  <div class="span6 lift">3</div>
  <div class="span6">4</div>
 </div><!-- end row -->
</div> <!-- end container -->

CSS

@import url('http://twitter.github.com/bootstrap/assets/css/bootstrap.css');

.row-fluid .span6{
    height:150px;
    background-color:olive;
}

.span6{
    border-top:20px solid white;
}

.row-fluid .span6.lift{
    position:relative;
    top:-30px;
    height:180px;
}