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Installation Procedure for H-20, HS -20 with Support Columns <br />Unloading Instructions: <br />❑ Upon delivery, inspect Fuji Clean tank, both outside and inside for possible damage incurred during <br />transport. If you find damage, or have a question, please contact your distributor immediately. <br />❑ Required Preconditions for this Installation Technique <br />✓ Seasonal high groundwater depth must be less than 3'3" (1000mm). <br />✓ Maximum riser height is 24 inches. <br />✓ Bearing power of soil must be 8.7 PSI or greater. <br />❑ Step 1: Excavation <br />❑ Step 2: Compact stone base <br />❑ Step 3: Set pre -cast concrete <br />or pour concrete base. <br />H-20 and HS -20 load needs <br />concrete base. <br />Bearing power of soil should be <br />8.7PS1 or more. <br />Check the concrete is level to 1/8" per 2 feet <br />(10mm per 2 meter or 1/200), <br />(fore and aft as well as side to side). <br />Pre -cast concrete base <br />23 <br />