The structural performance of steel structures under fire is an important consideration while designing industrial and residential building systems. This research aims to explore performance of multi-span trapezoidal sheeting systems at elevated temperatures under fire conditions. The current literature focuses on single spans and simplified connection assemblies leaving a gap in understanding the behavior of multi-span trapezoidal sheeting system in fire conditions. The primary goal of this project is to study the behavior of trapezoidal sheeting systems under fire condition. Specifically addressing the sheet behavior in large enclosure building, the design method of sheeting system, and the level of lateral support it provides to primary girder. This study will contribute to the field of structural fire engineering providing a deeper understanding of trapezoidal sheeting systems under fire. The findings will have practical industrial applications and will help in the design of safe, efficient, and resilient sheeting systems. The research primarily leans on numerical modelling along with limited experimental work.