table header splitting

by Rahul Chauhan

HTML

<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<div class="t">
<table class="table table-bordered">
<thead>
	<tr>
		<td rowspan="2" style="vertical-align: middle;">
			first
		</td>
		<td rowspan="2" style="vertical-align: middle;">
			Second
		</td>
		<td rowspan="2" style="vertical-align: middle;">
			Third
		</td>
		<td rowspan="1" colspan="2">
			Fourth
		</td>
	</tr>
	<tr>
		<td>
			fifth
		</td>
			<td>
				sixth
		</td>
	</tr>
</thead>
<tbody>
</tbody>
</table>
</div>

CSS

div {
	margin: 20px;
}