The necessity of large head room are now the essential point of view for any architecture and for that, the only way to solve this as per structural point of view is to be provide flat slab. The elimination of beam could show the drastic effect in different component of the structure. In this work the literature survey has been carried out to find the work done on flat slab and having drop also. By the help of response spectrum method the lateral forces imposed on the structure. During earthquake is taken for analysis. The interaction with shear wall is also mentioned in this paper. The cases evolved during review of literature are mentioned at the end of the paper.