This study developed the modified equivalent frame method. using column elements and equivalent slab-beam elements for two-way slab systems under lateral loads. A detailed comparative study between the F. E analysis (which is based on the three dimensional full width of slab) and 3D frame analysis using different types of effective moment of inertia of beam-slab section. https://parisnaturalfoodes.shop/product-category/dr-formulated-enzymes-org-digest/