Robustness, structural integrity and prevention risk of progressive collapse (PC) are among main design objectives for structures. After the (PC) of many remarkable structures, the need for better designing techniques has motivated engineers to prevent similar incidents. The main objective of this study is to investigate different structural systems to detect more practical and cost effective systems to enhance the (PC) resisting capacity. The study is extended to numerically investigate the effectiveness of these systems by analyzing a ten storey steel office building using alternative pass method discussed by UFC09 code. The study shows that one of the preferred practices to reduce the potentiality for (PC) is the use of belt trusses at the top of the building. The use of belt truss system holds the initial failure of the damaged elements and redistributes the loads supported by the failed elements with the least increase in the structure's weight.