Rethinking the basic plan types of architecture

The types of architectural plan determine the overall style of a building and the efficiency of its internal functions, making it one of the core issues in architectural research. Previous research on basic architectural plan types has mainly relied on personal experience and historical cases, which lack a unified logic and systematization. This study aims to re-deduce the basic types of architectural plan, exploring a basic plan library and a preliminary evaluation method based on a logical approach. The basic plan types are divided into regular polygon system and grid system, and a library containing 18 basic plan types is established based on the two systems, and more complex forms can be generated by combining the basic types. A preliminary evaluation method for the characteristics of basic plan types has been established using indicators including concentration, symmetry, and complexity. The universality of the 18 basic plan types is demonstrated through classic cases of historical and modern buildings. Compared with traditional studies, the basic plan type library proposed in this study is more logical and systematic, which can provide effective support for the design and analysis of architectural form, urban morphology, graphic works and product works.