Post Tension Repair

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Post-Tensioning is a method of reinforcing concrete, masonry, and other structural elements. Post-Tensioning is a method of prestressing. Prestressed concrete or masonry has internal stresses or forces induced into it during the construction phase for the purpose of counteracting the anticipated external loads that it will encounter during its lifecycle. Post-Tensioned reinforcing consists of very high strength steel strands or bars. A typical steel strand used for post-tensioning has a tensile strength of 270,000 pounds per square inch. In comparison, a typical non-prestressed piece of reinforcing (rebar) has a tensile strength of 60,000 psi . Strands typically have a diameter of ½ in., and are stressed to a force of 33,000 pounds using a hydraulic jack. When these strands fail the force or stress is dissipated throughout the structure and the results could be detrimental. Repair of this strands requires skilled personnel trained in the intricacy and potential energy associated with a live tendon. CPR is trained and certified to provide such repairs to both mono-strand or button-head systems.