.ux-data-table thead {
      position: absolute;
    }

.ux-data-table thead {
      position: fixed;
    }

.ux-data-table table {
  width: 100%;
}
.ux-data-table table,
.ux-data-table th,
.ux-data-table td {
  background-color: black;
  color: white;
  border: 1px solid black;
  width: 50px;
  min-width: 50px;
  max-width: 50px;
}
.ux-data-table thead {
  position: fixed;
}
.ux-data-table tbody {
  margin-top: 80px;
  display:block;
}

<div class='ux-data-table'>
  <div class='ux-data-table-inner'>
    <table>
      <thead>
        <tr>
<th>COLOCAÇÃO</th>
<th>Nº</th>
<th>NOME</th>
<th>CÓD. FAIXA ETÁRIA</th>
<th>COL. FAIXA ETÁRIA</th>
<th>TEMPO SWIM</th>
<th>T1</th>
<th>TEMPO BIKE</th>
<th>T2</th>
<th>TEMPO RUN</th>
<th>TEMPO TOTAL</th>
<th>EQUIPE</th>
        </tr>
      </thead>
      <tbody>
       <tr>
<td>1</td>
<td>12</td>
<td>MARCUS VINICIUS FERNANDES</td>
<td>M3034</td>
<td>–</td>
<td>00:11:32</td>
<td>00:00:29</td>
<td>00:45:36</td>
<td>00:00:29</td>
<td>00:22:01</td>
<td>01:20:07</td>
<td>MF ASSESSORIA ESPORTIVA</td>
</tr>
<tr>
<td>2</td>
<td>16</td>
<td>FELIPE JOSÉ MOLETTA</td>
<td>M3034</td>
<td>–</td>
<td>00:13:37</td>
<td>00:00:22</td>
<td>00:44:34</td>
<td>00:00:25</td>
<td>00:21:29</td>
<td>01:20:27</td>
<td>(nenhuma)</td>
</tr>
<tr>
<td>3</td>
<td>17</td>
<td>FERNANDO LUNARDELLI TOLDI</td>
<td>M3034</td>
<td>–</td>
<td>00:12:20</td>
<td>00:00:18</td>
<td>00:47:46</td>
<td>00:00:17</td>
<td>00:21:58</td>
<td>01:22:39</td>
<td>(nenhuma)</td>
</tr>
      </tbody>
    </table>
  </div>
</div>


<br/><br/><br/><br/><br/><br/><br/><br/>
<br/><br/><br/><br/>


<div class='ux-data-table'>
  <div class='ux-data-table-inner'>
    <table>
      <thead>
        <tr>
<th>COLOCAÇÃO</th>
<th>Nº</th>
<th>NOME</th>
<th>CÓD. FAIXA ETÁRIA</th>
<th>COL. FAIXA ETÁRIA</th>
<th>TEMPO SWIM</th>
<th>T1</th>
<th>TEMPO BIKE</th>
<th>T2</th>
<th>TEMPO RUN</th>
<th>TEMPO TOTAL</th>
<th>EQUIPE</th>
        </tr>
      </thead>
      <tbody>
       <tr>
<td>1</td>
<td>12</td>
<td>MARCUS VINICIUS FERNANDES</td>
<td>M3034</td>
<td>–</td>
<td>00:11:32</td>
<td>00:00:29</td>
<td>00:45:36</td>
<td>00:00:29</td>
<td>00:22:01</td>
<td>01:20:07</td>
<td>MF ASSESSORIA ESPORTIVA</td>
</tr>
<tr>
<td>2</td>
<td>16</td>
<td>FELIPE JOSÉ MOLETTA</td>
<td>M3034</td>
<td>–</td>
<td>00:13:37</td>
<td>00:00:22</td>
<td>00:44:34</td>
<td>00:00:25</td>
<td>00:21:29</td>
<td>01:20:27</td>
<td>(nenhuma)</td>
</tr>
<tr>
<td>3</td>
<td>17</td>
<td>FERNANDO LUNARDELLI TOLDI</td>
<td>M3034</td>
<td>–</td>
<td>00:12:20</td>
<td>00:00:18</td>
<td>00:47:46</td>
<td>00:00:17</td>
<td>00:21:58</td>
<td>01:22:39</td>
<td>(nenhuma)</td>
</tr>
      </tbody>
    </table>
  </div>
</div>