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This research article investigated the strengthening performance of Post-Tensioned Metal Strapping (PTMS) technique. Experimental program was divided into two phases. Concrete beam was tested up to flexural failure in phase I and then damaged concrete was removed prior repairing with high strength concrete. The strengthening work using PTMS was then applied to the repaired beam before testing in phase II. Based on the test result, it was found that the energy adsorption decreased to 11% due to the failure and yielding of reinforcement in Phrase 1. Ductility at ultimate and failure increased up to 18.4% and 29.3%, respectively. Therefore, the PTMS technique could be used to strengthen damaged concrete beams at service conditions.
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