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    structure until the concrete has reached the design strength required in Item 421, “Hydraulic Cement Concrete.” Backfill retaining walls with material meeting the requirements of Item 423, “Retaining Walls.”

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    System Description Monostrand Post-Tensioning System The strength, serviceability and design flexibility of concrete are greatly enhanced by the DYWIDAG Monostrand Post-Tensioning System.


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    Thus, when the concrete structure is later put into use under tensile load conditions, any tensile load applied in the direction of the prestressing will, up to the degree of applied prestress, serve merely to relieve the compressive stresses upon the concrete structure while not placing the structure …

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