## 5 Conclusions  
This study investigated the shear performance of the void slabs reinforced with various configurations. The experimental program employed four-point support load testing to validate shear failure modes and assess the impact of different design codes on predicted shear capacity. * **Shear failure confirmation:** The planned void slab specimens, designed according to ACI 318-14 for shear, all exhibited shear failure during load testing. This failure mode was further corroborated through the analysis of load-displacement curves and crack patterns. * **Enhanced shear capacity:** All test specimens demonstrated a significant reserve of shear strength, exceeding the expected shear capacity calculated using ACI 318-14 by a minimum factor of 1.436. This observation suggests the potential for more efficient design approaches that capitalize on the actual shear resistance of these hollow slab configurations. * **Hollow core ratio and shear strength:** An inverse relationship was observed between the porosity of the unreinforced specimens and their maximum shear strength. Specimens with higher porosity generally exhibited lower peak shear resistance. This finding highlights the influence of void content on the overall shear performance of hollow slabs. * **Comparative analysis of design codes:** The expected shear strengths estimated using established design codes (ACI 318-14, UBC 2, and CEB-FIP 1990) were compared against the experimentally obtained maximum shear strengths. Among these codes, CEB-FIP 1990 demonstrated the closest agreement between predicted and actual shear capacity. This suggests that CEB-FIP 1990 may provide a more accurate representation of the shear behaviour for this specific type of hollow slab with shear reinforcement. In addition, future research efforts could be directed toward a more comprehensive understanding of these shear-reinforced hollow slabs. One avenue would be to explore the influence of different shear reinforcement configurations, including alternative layouts and materials. This could provide valuable insights for optimizing shear performance and potentially lead to more efficient designs. Additionally, developing and validating analytical models that capture the intricate interaction between the hollow core and the shear reinforcement would be crucial for achieving more precise predictions of shear capacity. Finally, evaluating the long-term behaviour of these slabs under sustained loads is essential for practical design considerations, as it would offer valuable information on their performance over time in real-world applications. This study provides valuable insights into the shear behaviour of void slabs with shear reinforcement. The observed enhancement in shear capacity compared to code predictions highlights the potential for more efficient design strategies. The influence of porosity and the comparative analysis of design codes offer additional considerations for future design and research endeavours. By continuing to investigate the behaviour of these composite structures, engineers can develop optimized solutions for the safe and efficient utilization of hollow slabs in various construction applications. [PERSON] was responsible for research planning, experimentation, and system identification; [PERSON] contributed to research writing, reference research, and analysis research; [PERSON], conducted experiments and assisted with organising and analysing data. Each author played a crucial role in the success of this study, and their contributions are greatly appreciated. All authors have read and agreed to the published version of the manuscript. This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2021R11A1A01049977). The datasets generated and/or analysed during the current study are not publicly available due to confidentiality agreements with the construction companies involved in the study.