Eghbal Sekhavati - Department of Environmental Engineering, Ahvaz Branch, Islamic Azad University (IAU), Ahvaz, Iran.
Reza Jalilzadeh Yengejeh - Department of Environmental Engineering, Ahvaz Branch, Islamic Azad University (IAU), Ahvaz, Iran.

Introduction: Safety and health risk assessment in industries is associated with uncertainties due to the variables affecting it. Therefore, in this research, optimizing safety and health risk assessment was investigated in construction sites by combining a multi-criteria decision-making technique (TOPSIS) and a fuzzy system. In the present study, to answer this question, a new method was used to optimize health risk assessment in construction workshops. Materials and Methods: The case study was construction sites in Lar, a city in the south of Iran. Based on previous studies and expert opinions, ten criteria were determined to assess safety and health risks in the construction sites. Also, ۱۵ safety and health risks were identified resulting from ۱۲ types of activities in the construction sites. Triangular fuzzy numbers were used for linguistic variables in Fuzzy TOPSIS with R version ۱.۱ software. Results: Based on the results, the risk of the collapse of adjacent buildings related to the excavation process was the most important safety and health risk in the construction sites with a coefficient value of ۰.۵. Conclusion: This method can provide desired results with the least uncertainty in prioritizing safety and health risks.

Risk Assessment, Safety and Health, Fuzzy Topsis, Lar City.