Why can't all the houses be set as standard floors?

The standard floor can't meet the building requirements.

Standard floors refer to floors with the same plane layout in multi-storey or high-rise buildings. But some houses are not only for living, but also for hotels. If the hotel has a standard floor, it can't meet the needs of guests. The hotel needs a lobby, but there is no lobby, which is not in line with the design concept of the hotel. So designing a standard floor depends on the actual situation and actual demand.

The situation that the standard story cannot be designed includes the top story, the story with shear wall, frame column, concealed column, variable cross-section and the key story with variable cross-section.