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The following design charts and tables, viewable as Acrobat PDF documents, provide a guideline for when wall reinforcement is required. Three cases showing different surcharge loads and soil types are provided for each.

You can download Acrobat Reader free of charge from www.adobe.com

Gravity Walls (walls without geogrid reinforcement) 132k
Explanation of how to use the geogrid reinforced design charts. 116k
Keystone Standard Units with setback (pins in back pin holes) 40k
Keystone Standard Units in vertical position (pins in front pin holes) 36k
Keystone Compac Units with setback (pins in back pin holes) 44k
Keystone Compac Units in vertical position (pins in front pin holes) 40k
Keystone Century Wall Design Charts 1.1mg
Keystone Country Manor Design Charts 300k
Tablas y Gráficas de Diseno en Español