The default grid system provided as part of Bootstrap is a 940px-wide, 12-column grid.
リノ デジタルカレンシー【6.17 J2 Sec.19】（Ksスター）※1800 スタート レフリー 高山 浩義 副審 伊藤 智也クラブを通じて「フランクフルトのブンデスリーガでプレーすることを楽しみにしています
<div class="row"> <div class="span4">...</div> <div class="span8">...</div> </div>
As shown here, a basic layout can be created with two "columns," each spanning a number of the 12 foundational columns we defined as part of our grid system.
<div class="row"> <div class="span4">...</div> <div class="span4 offset4">...</div> </div>
With the static (non-fluid) grid system in Bootstrap, nesting is easy. To nest your content, just add a new .row and set of .span* columns within an existing .span* column.