soluzione classica :

codice:
<table border="1" width="100%">
  <tr>
    <td width="33%" align="center">interstazione1</td>
    <td width="33%" align="center">intestazione2</td>
    <td width="34%" align="center">intestazione3</td>
  </tr>
  <tr>
    <td width="33%" align="center">dati</td>
    <td width="33%" align="center">dati</td>
    <td width="34%" align="center">dati</td>
  </tr>
  <tr>
    <td width="33%" align="center">dati</td>
    <td width="33%" align="center">dati</td>
    <td width="34%" align="center">dati</td>
  </tr>
  <tr>
    <td width="33%" align="center">dati</td>
    <td width="33%" align="center">dati</td>
    <td width="34%" align="center">dati</td>
  </tr>
  <tr>
    <td width="33%" align="center">dati</td>
    <td width="33%" align="center">dati</td>
    <td width="34%" align="center">dati</td>
  </tr>
</table>