Configure at Admin Dashboard → Fracture Theme, then go to Layouts to set the grid widths and allocated positions.
Injected Gantry Gizmos
There are Gizmos that are injected into a site when enabled in the Administrator, and are stacked vertically.
These are the Google Analytics, Page Suffix, Smart Load Images, Typography Shortcodes, Page Class Suffix, RokStyle, Build Title-Spans, Disable Auto Paragraphs, Disable Texturize and IE7 Redirect.
MainBody/Sidebar Layouts
Configure at Admin Dashboard → → Fracture Theme, then go to Layouts tab and set the varying Mainbody/Sidebar layout possibilities.
Note: If no widgets are placed to the Sidebar positions, the Mainbody will become full width.