The following code shows how to create row with span4 span4 span4.
<!DOCTYPE html>
<html>
<head>
<link
href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css"
rel="stylesheet">
<script
src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/js/bootstrap.min.js"></script>
</head><!--from ww w. j a v a2 s. com-->
<body>
<div class="container-fluid">
<div class="row-fluid">
<div class="span4">
<div style="border: 1px solid black; min-width: 400px; width: 400px">
span4</div>
</div>
<div class="span4">
<div style="border: 1px solid red; min-width: 400px; width: 400px">
span4</div>
</div>
<div class="span4">
<div style="border: 1px solid green; min-width: 400px; width: 400px">
span4</div>
</div>
</div>
</div>
</body>
</html>