header
, nav
, article
, aside
, footer
tags and morecol-md-x
where x
is a value of 1
through 12
for the grid.container
s or wrapper
s.<section class='section'>
<article class='row'>
<div class='col-md-3'>3</div>
<div class='col-md-6'>6</div>
<div class='col-md-3'>3</div>
</article>
</section>
Columns must add up to 12!