"For site areas with greater than a 4"" slope, the low-end of the area can be blocked-up using a series of solid concrete blocks or additional 4 x 4 lumber under the skids. These should be positioned and ""built-up"" as a level ""layer"" under the skids. Complete excavation of the site is also another option. "
"If you would like to return your Rubbermaid Frameworks product please do not return it to the store that you purchased it from. For assistance, please call Customer Service at 1-888-895-2110, Monday through Friday 8:30 a.m. - 5:00 p.m. Eastern. "