In today's world, the risk of explosions in urban and residential areas is increasing and the huge financial and financial losses resulting from these incidents have caused public attention to be made to deal with it. Many of the existing structures, especially buildings constructed in special places and with special titles and whose defense debate is important, are vulnerable to the loads caused by the explosion, and thus their resistance to such loads should be assessed, with protection measures, critical points, and critical points. Corrected. This paper compares the responses of external surface explosive charge and seismic responses in a 5-story steel structure. It should be noted that the building was designed by the third edition of the Earthquake Regulations (2800), which was redesigned by the fourth edition of the Code and then, using SAP2000 software, the modeling was performed and the threshold of structural tolerance and the behavior of members and elements under extraction load were extracted and Compared to earthquake. The outputs indicate that the structure of the structure in the earthquake and the explosion is similar and its major weakness is in divergent curtain braces and frames. Also, the threshold of structural resistance to the explosive charge applied based on the scale distance parameter is Z = 13.8 .