Included in the theme with some minor modifications is Simple Grid 2013 by Dallas Bass, Released under the MIT License.
Using grids is easy and is builtin into the theme. You can insert grids from the “Slydeways Inserts” menu in the WordPress editor. From the menu select Insert Grid and by selecting the grid style you want from the dropdown menu.
The Grid CSS is loaded in a separate style sheet. If you want to use a different grid or none you can remove or replace the call to load the css style sheet in the footer.
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