Boxed

Add class (page-container-boxed) to (body) tag to get boxed layout. Width of box can be changed to your own. like this:

<html lang="en">
  <body class="page-container-boxed">
    <div class="init-wrapper">
      <nav class="navbar navbar-default init-top-header">
        <!-- Top bar -->
      </nav>
      <div class="init-left-sidebar">
        <!-- Left sidebar -->
      </div>
      <div class="init-content">
        <!-- Main content -->
      </div>
      <div class="init-right-sidebar">
        <!-- Right sidebar -->
      </div>
    </div> 
  </body>
</html>