<div class="service one-third column" style="float: left; width: 45%; height:450px; padding:15px; background-color:#f2f2f2">
div left
</div>
<div class="service one-third column" style="float: left; width: 45%; height:450px; padding:15px; background-color:#f2f2f2">
div right
</div>