DIV.ram2 {
overflow: auto;
width:inherit; /* Ширина блока */
height: 150px; /* Высота блока */
}
<div class="ram2">
<table >
<thead>'
<tr>
<td border: 1px solid black;>1</td>
<td border: 1px solid black;>2</td>
</tr>
</thead>
<tbody><tr>
<td border: 1px solid black;>11</td>
<td border: 1px solid black;>21</td>
<td border: 1px solid black;>11</td>
<td border: 1px solid black;>21</td>
<td border: 1px solid black;>11</td>
<td border: 1px solid black;>21</td>
<td border: 1px solid black;>11</td>
<td border: 1px solid black;>21</td>
<td border: 1px solid black;>11</td>
<td border: 1px solid black;>21</td>
<td border: 1px solid black;>11</td>
<td border: 1px solid black;>21</td>
<td border: 1px solid black;>11</td>
<td border: 1px solid black;>21</td>
<td border: 1px solid black;>11</td>
<td border: 1px solid black;>21</td>
<td border: 1px solid black;>11</td>
<td border: 1px solid black;>21</td>
<td border: 1px solid black;>11</td>
<td border: 1px solid black;>21</td>
</tr>
</tbody></table>
