<p>Well-known design codes employ different lateral load patterns for the Equivalent Lateral Force (ELF) procedure. however, the effect of designing with these different lateral load patterns on the structural collapse capacity has rarely been studied. Different lateral load patterns employed in design result in distinct distributions of stiffness and strength along the height of the structure and consequently in non-uniform distribution of damage in building stories. As a result, the damage may be very severe in some stories such that exceeds the collapse criteria, while the capacity of other stories is not fully used. Therefore, different lateral load patterns induce variations in the distributions of stiffness and strength along the building height, thereby affecting the structural collapse capacity. The influence of employing varying lateral load patterns on the collapse capacity of structures is evaluated in this study. For this purpose, steel moment-resisting frames (SMRFs) were designed using four distinct load patterns, such that all structures designed with different load patterns have the same total weight. Subsequently, by performing incremental dynamic analysis (IDA) and fragility analyses for designed models, the median collapse intensities were compared. The results clarify that the lateral load pattern can affect the collapse capacity of the structure by up to 20%.</p>