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IMPORTANT Don't forget to adjust the depth of the foundation to your frost line.  You can add or subtract the depth from the tower, not the base.

The entire foundation requires about 1 yard of standard concrete.  That is equal to forty (40) eighty (80) pound bags of Sakrete or equal product.  About $280.00 at current prices.  Net $196,00 after the 30% tax Credit.

Spacing for multiple units to avoid shading.  30' on the East to West line.  43' on the North to South Line.