Abstract: The use of reinforced concrete buildings has become a general scene in the contemporary world. The analysis, design and construction processes have been idealized through various building design codes and design philosophies. Buildings are designed to withstand all the loads that may occur with a certain degree of probability during its entire lifetime. Different categories of loads have been classified by codes in accordance with the purpose and location of the structure. Among all the loads, imposed load has the moving tendency and can translate from one span to the other forming different patterns of loading. In present study, a G+1 storey, 5 bay x 5 bay frame subjected to an imposed load of 5 kN/m2 located in seismic zone II, has been taken as a base frame and analysis is done using STAAD Pro software. The member forces of a building are compared between conventional loading (i.e. seismic and all span gravity loading) and pattern loading (i.e. conventional loading plus 5 patterns of imposed load) to determine the necessity of pattern loading. In beam members the values of bending moment are significantly higher for pattern loading as compared with conventional loading. This increase in moment is found more in beam sagging moment compared to hogging moment. The effect of pattern loading is felt more on the upper storey exterior beams compared to the lower storey beams. Pattern loading causes insignificant changes in the beam shear force and column axial force.