Page Aside Layout
You can activate page aside layout option to the main content by adding this class (be-aside) to the main wrapper (be-wrapper) element and before of the main-content element, and adding the aside (page-aside) inside of the (be-content) element, this way your main structure should be like this:
<html lang="en">
<body>
<div class="be-wrapper be-aside">
<nav class="navbar navbar-default navbar-fixed-top be-top-header">
<!-- Top bar -->
</nav>
<div class="be-left-sidebar">
<!-- Left sidebar -->
</div>
<div class="be-content">
<aside class="page-aside">
<!-- Aside content -->
</aside>
<div class="main-content container-fluid">
<!-- Main content -->
</div>
</div>
<div class="be-right-sidebar">
<!-- Right sidebar -->
</div>
</div>
</body>
</html>