The Australian Concrete Structures Code (AS3600-2018) introduced a new clause referring to the requirement of integrity reinforcement, which was previously not required. Integrity reinforcement refers to the use of bottom steel reinforcement located over column supports, which will provide a secondary loading path in order to avoid the brittle nature of a punching shear failure. The requirement has caused ambiguity regarding the design and detailing of integrity reinforcement; the clause incorporated into AS3600-2018 only referred to steel reinforcements being used as integrity reinforcement and did not consider the use of post-tensioned (PT) tendons and their ability to provide a secondary loading path after a punching shear failure. Hence, this study aims to investigate the PT tendons as integrity reinforcement using finite element analysis, and a comparative study will be carried out to determine the minimum steel reinforcement requirement using other national codes such as ACI 318, CSA A23.3, and Eurocode 2.