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High strength prestressing steel strands are wrapped with spiral wire, and are locked into tension plates at each end of the mold. |
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The specially formulated high strength concrete is placed into the bottom half of the mold. |
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The mold is bolted closed, the strand is prestressed, and then the mold is spun at a high rate. The centrifugal force compresses the concrete against the inner wall of the mold. |
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The finished pole has a hollow center, and the most dense, least permeable, strongest concrete man can make. |
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